An internal circulation anaerobic reaction device for sewage treatment

Abstract

The utility model discloses an internal circulation anaerobic reaction device for sewage treatment, including sludge pump, suction pipe, jet pipe, air pump and nozzle. The internal circulation anaerobic reaction device for sewage treatment, the bottom surface of suction pipe is evenly provided with suction hole, and the lower part inboard circumference of anaerobic reaction bin is provided with the jet pipe that sets up upwards, and the bottom fixedly connected with of jet pipe has the liquid inlet bin, and the inside fixedly connected with of jet pipe has the nozzle that sets up upwards, and the nozzle is fixedly connected with the gas pipe, and the gas pipe is fixedly connected with through jet pipe and anaerobic reaction bin, and constructs the forced internal circulation system, can the high concentration active sludge that anaerobic reaction bin bottom settled is continuously extracted and evenly delivered to the water body in bin body upper part, thoroughly improved the anaerobic bin sludge concentration of uneven, sewage and active sludge contact insufficient problem in the prior art, greatly promotes the contact area of both, speeds up anaerobic reaction rate, reduces the sludge waste caused by sludge settlement simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, specifically an internal circulation anaerobic reactor for wastewater treatment. Background Technology

[0002] Anaerobic biological wastewater treatment is a common wastewater treatment method. Anaerobic organisms transform various complex organic substances in wastewater into biodegradable substances, thereby achieving the effect of decontamination. Anaerobic biological wastewater treatment needs to be carried out under anaerobic conditions.

[0003] However, existing anaerobic reactors for wastewater treatment are equipped with a stirring mechanism to mix wastewater with activated sludge (activated sludge is a general term for microbial communities and the organic and inorganic substances they depend on), increasing the contact area between activated sludge and wastewater, thus enabling activated sludge to accelerate wastewater treatment efficiency.

[0004] A search revealed that patent documents with publication numbers CN 222118986 U and CN 224030783 U both disclose anaerobic wastewater treatment technologies. However, because the density of activated sludge is greater than that of wastewater, it is very easy for it to settle to the bottom of the anaerobic chamber when left to stand for a long time or when the stirring intensity is insufficient. This results in extremely low concentrations of activated sludge in the wastewater above the anaerobic chamber, significantly reducing the mixing and contact between the two. This not only reduces wastewater treatment efficiency but also wastes activated sludge and increases treatment costs. Utility Model Content

[0005] The purpose of this invention is to provide an internal circulation anaerobic reactor for wastewater treatment to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An internal circulation anaerobic reactor for wastewater treatment includes an anaerobic reaction chamber. A suction pipe is located on the inner bottom side of the anaerobic reaction chamber, with suction holes evenly distributed on the bottom surface of the suction pipe. An upward-facing jet pipe is located on the inner lower circumference of the anaerobic reaction chamber. An inlet chamber is fixedly connected to the bottom of the jet pipe. An upward-facing nozzle is fixedly connected inside the jet pipe, and an air supply pipe is fixedly connected to the nozzle. The air supply pipe passes through the jet pipe and is fixedly connected to the anaerobic reaction chamber. A sludge pump and an air pump are fixedly installed on the top surface of the anaerobic reaction chamber. The air inlet of the air pump is connected to the interior of the anaerobic reaction chamber, and the air supply pipe is fixedly connected to the air outlet of the air pump via a multi-port connector. An inlet pipe is fixedly connected to the inlet chamber, passing through the side wall of the anaerobic reaction chamber and fixedly connected. The inlet pipe is fixedly connected to the outlet of the sludge pump via a multi-port connector, and the inlet of the sludge pump is connected to the suction pipe.

[0007] As a further embodiment of this utility model: a hollow shaft is rotatably connected through the middle of the anaerobic reaction chamber, and suction pipes are symmetrically and fixedly connected to the bottom two sides of the hollow shaft and are interconnected. A connecting pipe is rotatably connected to the top of the hollow shaft through a rotating pipe joint, and the connecting pipe is fixedly connected to the inlet end of the sludge pump.

[0008] As a further embodiment of this utility model: a stirring rod is fixedly connected to the outer side of the hollow shaft, a first gear is fixedly connected to the top of the hollow shaft, a second gear is provided outside the first gear and meshes with it, the second gear is fixedly connected to the output end of the motor, and the motor is fixedly connected to the top surface of the anaerobic reaction chamber.

[0009] As a further improvement of this utility model: a scraper is fixedly connected to one side of the inhalation tube, and the scraper slides in contact with the bottom of the anaerobic reaction chamber.

[0010] As a further improvement of this utility model: a three-way valve is installed on the connecting pipe, a filling pipe is fixedly connected to the three-way valve, and a discharge valve is provided at the bottom of the anaerobic reaction chamber.

[0011] As a further improvement of this utility model: a pressure relief valve is fixedly installed on the top of the anaerobic reaction chamber, and a liquid level observation window is provided on the outer wall of the anaerobic reaction chamber.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model constructs a forced internal circulation system by cooperating with a sludge pump, suction pipe, jet pipe, air pump and nozzle. It can continuously extract and evenly transport the high-concentration activated sludge settled at the bottom of the anaerobic reaction chamber to the water body above the chamber. This completely improves the problems of uneven sludge concentration and insufficient contact between sewage and activated sludge in the existing technology, greatly increases the contact area between the two, accelerates the anaerobic reaction rate, and reduces sludge waste caused by sludge settling.

[0013] 2. This utility model, through the cooperation of a motor, gear transmission mechanism, and hollow shaft, synchronously drives the stirring rod, suction pipe, and scraper to rotate. Compared with the single stirring mechanism of the prior art, it not only achieves full-area stirring of the water in the chamber through the stirring rod, further enhancing the mixing effect of sewage and sludge; but also achieves full-range suction of sludge at the bottom of the chamber through the rotating suction pipe, eliminating suction dead zones; at the same time, the scraper scrapes and cleans the bottom of the chamber, completely preventing sludge from hardening and accumulating at the bottom of the chamber, ensuring the long-term stable operation of the internal circulation system, and avoiding the reduction of treatment efficiency due to sludge accumulation.

[0014] 3. This utility model, through the linkage of the three-way valve, the injection pipe and the internal circulation system, can uniformly eject the sewage to be treated through multiple sets of circumferentially arranged jet pipes at multiple points. Compared with the single-point centralized injection method of the prior art, it avoids the problems of uneven water mixing and excessive local organic load caused by single-point water inlet. It enables the sewage to be treated to mix quickly and evenly with the activated sludge in the chamber, ensures the stability of the anaerobic reaction conditions, and improves the adaptability of the device to the inlet water load. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an internal circulation anaerobic reactor for wastewater treatment.

[0016] Figure 2 This is a front view of an internal circulation anaerobic reactor for wastewater treatment.

[0017] Figure 3 This is a partial structural diagram of an internal circulation anaerobic reactor for wastewater treatment.

[0018] In the diagram: 1. Anaerobic reaction chamber; 2. Suction pipe; 3. Suction port; 4. Jet pipe; 5. Liquid inlet chamber; 6. Nozzle; 7. Gas supply pipe; 8. Sludge pump; 9. Air pump; 10. Liquid inlet pipe; 11. Hollow shaft; 12. Connecting pipe; 13. Stirring rod; 14. Scraper; 15. Three-way valve; 16. Filling pipe; 17. Discharge valve; 18. Pressure relief valve; 19. Liquid level observation window; 20. First gear; 21. Second gear; 22. Motor. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1-3In this embodiment of the present invention, an internal circulation anaerobic reactor for wastewater treatment includes an anaerobic reaction chamber 1. A suction pipe 2 is provided on the inner bottom side of the anaerobic reaction chamber 1. Suction holes 3 are evenly distributed on the bottom surface of the suction pipe 2. An upwardly oriented jet pipe 4 is provided on the lower inner circumference of the anaerobic reaction chamber 1. An inlet chamber 5 is fixedly connected to the bottom of the jet pipe 4. An upwardly oriented nozzle 6 is fixedly connected inside the jet pipe 4. An air supply pipe 7 is fixedly connected to the nozzle 6, and the air supply pipe 7 penetrates the jet pipe 4 and the anaerobic reaction chamber 1. The anaerobic reaction chamber 1 is fixedly connected. A sludge pump 8 and an air pump 9 are fixedly installed on the top surface of the anaerobic reaction chamber 1. The air inlet end of the air pump 9 is connected to the inside of the anaerobic reaction chamber 1. The air supply pipe 7 is fixedly connected to the air outlet end of the air pump 9 through a multi-port pipe joint. An inlet pipe 10 is fixedly connected to the liquid inlet chamber 5. The inlet pipe 10 penetrates the side wall of the anaerobic reaction chamber 1 and is fixedly connected. The inlet pipe 10 is fixedly connected to the liquid outlet end of the sludge pump 8 through a multi-port pipe joint. The liquid inlet end of the sludge pump 8 is connected to the suction pipe 2.

[0021] The sludge pump 8 draws in the activated sludge mixture from the bottom of the anaerobic reaction chamber 1 through the suction pipe 2, and delivers it to the inlet chamber 5 through the inlet pipe 10, then upwards into the jet pipe 4. The air pump 9 simultaneously extracts the air from the anaerobic reaction chamber 1 and delivers it to the nozzle 6 through the air supply pipe 7, causing the sewage in the jet pipe 4 to be ejected upwards along with the air, facilitating full contact and mixing with the air in the upper part of the anaerobic reaction chamber 1.

[0022] A hollow shaft 11 is rotatably connected to the middle of the anaerobic reaction chamber 1. Suction pipes 2 are symmetrically fixedly connected to the bottom two sides of the hollow shaft 11 and are interconnected. The top of the hollow shaft 11 is rotatably connected to a connecting pipe 12 through a rotating pipe joint. The connecting pipe 12 is fixedly connected to the inlet end of the sludge pump 8.

[0023] The activated sludge wastewater sucked into the suction pipe 2 is lifted by the hollow shaft 11 and finally enters the sludge pump 8 through the connecting pipe 12.

[0024] A stirring rod 13 is fixedly connected to the outer side of the hollow shaft 11, and a first gear 20 is fixedly connected to the top of the hollow shaft 11. A second gear 21 meshes with the first gear 20. The second gear 21 is fixedly connected to the output end of the motor 22. The motor 22 is fixedly connected to the top surface of the anaerobic reaction chamber 1.

[0025] A scraper 14 is fixedly connected to one side of the suction pipe 2, and the scraper 14 slides in contact with the bottom of the anaerobic reaction chamber 1.

[0026] The motor 22 drives the second gear 21 to rotate, which in turn drives the hollow shaft 11 to rotate via the first gear 20. This, in turn, drives the stirring rod 13 to rotate, stirring the liquid inside the anaerobic reaction chamber 1 and increasing the mixing effect. Simultaneously, it drives the suction pipe 2 to rotate, which in turn drives the scraper 14 to thoroughly agitate the activated sludge at the bottom of the anaerobic reaction chamber 1. A three-way valve 15 is installed on the connecting pipe 12, and a filling pipe 16 is fixedly connected to the three-way valve 15. A discharge valve 17 is provided at the bottom of the anaerobic reaction chamber 1.

[0027] By switching the three-way valve 15, the filling pipe 16 can be connected to the sludge pump 8 via the connecting pipe 12, allowing the added wastewater to be treated to be ejected from multiple points through the jet pipe 4, avoiding the problem of centralized filling. After the anaerobic reaction is completed, the discharge valve 17 can be opened to discharge the treated wastewater.

[0028] A pressure relief valve 18 is fixedly installed on the top of the anaerobic reaction chamber 1, and a liquid level observation window 19 is provided on the outer wall of the anaerobic reaction chamber 1.

[0029] The pressure relief valve 18 can release the gas produced by the anaerobic reaction when the pressure inside the anaerobic reaction chamber 1 is too high. At the same time, the liquid level inside the anaerobic reaction chamber 1 can be easily observed through the liquid level observation window 19 during filling.

[0030] The sludge pump 8, air pump 9, and motor 22 are all externally connected to power supplies and switches.

[0031] The working principle of this utility model is as follows: When the device is running, the sludge pump 8, which is fixedly installed on the top surface of the anaerobic reaction chamber 1, starts and continuously sucks in the high-concentration activated sludge and sewage mixture that has settled at the bottom of the anaerobic reaction chamber 1 due to its density being greater than that of sewage, through the suction pipe 2 connected to its own inlet end and the suction holes 3 evenly opened on the bottom surface of the suction pipe 2. The sludge pump 8 then delivers the sucked mixture through the outlet end and through the multi-port pipe joint to the inlet pipe 10, which is fixedly connected to the inlet chamber 5. After entering the inlet chamber 5 through the inlet pipe 10, the mixture flows upward into the jet pipe 4 arranged on the inner circumference of the lower part of the anaerobic reaction chamber 1. The synchronously started air pump 9 has its air inlet end connected to the inside of the anaerobic reaction chamber 1. It draws gas from the upper part of the anaerobic reaction chamber 1 and delivers it to the air supply pipe 7, which is fixedly connected to the nozzle 6, through the multi-port pipe joint at the air outlet end. Finally, the gas is ejected at high speed through the nozzle 6 arranged upward inside the jet pipe 4. The high-speed ejected gas is fully mixed with the sludge-sewage mixture flowing upward in the jet pipe 4 to form a gas-liquid mixture flow, which is then rapidly ejected upward along the jet pipe 4. This evenly transports the high-concentration activated sludge at the bottom to the water body in the upper part of the anaerobic reaction chamber 1, solving the problem of uneven sludge concentration and insufficient contact between the upper and lower parts of the chamber caused by activated sludge settling. It significantly increases the contact area between activated sludge and sewage, enhances the efficiency of anaerobic reaction, and completes the core sludge-sewage internal circulation process of the device.

[0032] After the motor 22, which is fixed on the top surface of the anaerobic reaction chamber 1, is started, it drives the second gear 21, which is fixedly connected to its output end, to rotate. Through gear meshing, the first gear 20, which meshes with the second gear 21, is driven to rotate, which in turn drives the hollow shaft 11, which is fixedly connected to the first gear 20, to rotate stably in the middle of the anaerobic reaction chamber 1. When the hollow shaft 11 rotates, it synchronously drives the stirring rod 13, which is fixedly connected to its outer side, to rotate synchronously in the water in the chamber, so as to carry out full-area stirring of the sewage and activated sludge in the anaerobic reaction chamber 1, further enhance the water mixing effect, and avoid the problem of uneven reaction in some areas of the chamber. Simultaneously, when the hollow shaft 11 rotates, it drives the suction pipes 2, which are symmetrically fixed and interconnected on both sides of its bottom, to rotate synchronously. On the one hand, the suction pipes 2, through the suction holes 3, comprehensively extract the settled sludge from all positions at the bottom of the anaerobic reaction chamber 1 during rotation, eliminating suction dead zones and ensuring the suction coverage of the internal circulation. On the other hand, when the suction pipes 2 rotate, they drive the scraper 14, which is fixedly connected to one side, to rotate synchronously. The scraper 14 slides against the bottom of the anaerobic reaction chamber 1, which can continuously scrape and turn over the activated sludge deposited at the bottom of the chamber, completely avoiding sludge hardening and accumulation at the bottom of the chamber. This ensures the suction efficiency of the internal circulation system and avoids the problems of sludge waste and reduced sewage treatment efficiency caused by long-term sludge accumulation.

[0033] During the wastewater filling stage, the three-way valve 15 installed on the connecting pipe 12 can be switched to connect the filling pipe 16, which is fixedly connected to the three-way valve 15, to the inlet end of the sludge pump 8 through the connecting pipe 12. The wastewater to be treated can enter the system through the filling pipe 16, and after passing through the sludge pump 8, the inlet pipe 10, and the inlet chamber 5, it is evenly ejected from multiple points through multiple sets of circumferentially arranged jet pipes 4, thus completing the uniform filling of wastewater and avoiding the problems of uneven water mixing and excessive local organic load caused by traditional single-point centralized filling. After the anaerobic reaction is completed, the discharge valve 17 located at the bottom of the anaerobic reaction chamber 1 can be opened to discharge the treated wastewater. During the operation of the device, the operator can observe the liquid level in the chamber in real time through the liquid level observation window 19 located on the outer wall of the anaerobic reaction chamber 1, and control the wastewater injection volume and operating liquid level. When the pressure inside the anaerobic reaction chamber 1 becomes too high due to continuous anaerobic gas production, the pressure relief valve 18 installed at the top of the anaerobic reaction chamber 1 can be automatically opened to release pressure, ensuring the safety and stability of the device operation and maintaining the stable pressure environment required for the anaerobic reaction inside the chamber.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 wastewater treatment internal circulation anaerobic reactor, comprising an anaerobic reaction chamber (1), characterized in that: The anaerobic reaction chamber (1) has an intake pipe (2) on its inner bottom side. Intake holes (3) are evenly distributed on the bottom surface of the intake pipe (2). An upward-facing jet pipe (4) is located on the inner lower circumference of the anaerobic reaction chamber (1). A liquid inlet chamber (5) is fixedly connected to the bottom of the jet pipe (4). An upward-facing nozzle (6) is fixedly connected inside the jet pipe (4). A gas delivery pipe (7) is fixedly connected to the nozzle (6). The gas delivery pipe (7) passes through the jet pipe (4) and is fixedly connected to the anaerobic reaction chamber (1). A sludge pump (8) and an air pump (9) are fixedly installed on the top surface of the anaerobic reaction chamber (1). The air inlet of the air pump (9) is connected to the interior of the anaerobic reaction chamber (1). The air supply pipe (7) is fixedly connected to the air outlet of the air pump (9) through a multi-port pipe joint. An inlet pipe (10) is fixedly connected to the liquid inlet chamber (5). The inlet pipe (10) penetrates the side wall of the anaerobic reaction chamber (1) and is fixedly connected. The inlet pipe (10) is fixedly connected to the outlet of the sludge pump (8) through a multi-port pipe joint. The inlet of the sludge pump (8) is connected to the suction pipe (2).

2. The wastewater treatment internal circulation anaerobic reactor according to claim 1, characterized in that: A hollow shaft (11) is rotatably connected to the middle of the anaerobic reaction chamber (1). Suction pipes (2) are symmetrically fixedly connected to the bottom two sides of the hollow shaft (11) and are interconnected. A connecting pipe (12) is rotatably connected to the top of the hollow shaft (11) through a rotating pipe joint. The connecting pipe (12) is fixedly connected to the liquid inlet end of the sludge pump (8).

3. The wastewater treatment internal circulation anaerobic reactor according to claim 2, characterized in that: A stirring rod (13) is fixedly connected to the outside of the hollow shaft (11), and a first gear (20) is fixedly connected to the top of the hollow shaft (11). A second gear (21) meshes with the first gear (20), and the second gear (21) is fixedly connected to the output end of the motor (22). The motor (22) is fixedly connected to the top surface of the anaerobic reaction chamber (1).

4. The wastewater treatment internal circulation anaerobic reactor according to claim 3, characterized in that: A scraper (14) is fixedly connected to one side of the inhalation tube (2), and the scraper (14) slides in contact with the bottom of the anaerobic reaction chamber (1).

5. The wastewater treatment internal circulation anaerobic reactor according to claim 2, characterized in that: A three-way valve (15) is installed on the connecting pipe (12), and a filling pipe (16) is fixedly connected to the three-way valve (15). A discharge valve (17) is provided at the bottom of the anaerobic reaction chamber (1).

6. The wastewater treatment internal circulation anaerobic reactor according to claim 1, characterized in that: The top of the anaerobic reaction chamber (1) is fixedly equipped with a pressure relief valve (18), and the outer wall of the anaerobic reaction chamber (1) is provided with a liquid level observation window (19).

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