High-efficiency biological fermentation sewage treatment device

Abstract

The utility model provides a high-efficiency biological fermentation sewage treatment device which comprises a treatment pond, a membrane bioreactor is arranged in the treatment pond, a pretreatment box is arranged on one side of the membrane bioreactor, and the bottom of the pretreatment box is fixed to the bottom of the treatment pond through a plurality of supporting legs. Two filter screen plates are symmetrically fixed in the pretreatment box, the two filter screen plates are arranged in a V shape, a plurality of water inlet pipes are arranged at the top of the pretreatment box at intervals, the water inlet pipes are located over the filter screen plates, and a plurality of water outlet pipes are arranged at the bottom of the pretreatment box at intervals; according to the utility model, the problems that part of solid impurities are remained in most of sewage before the sewage enters the membrane bioreactor, and if the sewage is not filtered, a filter membrane in the membrane bioreactor is easy to block are solved.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to a high-efficiency biological fermentation sewage treatment device. Background Art

[0002] Sewage treatment is a process of purifying sewage to meet the discharge standard or the water quality requirements for reuse. Sewage treatment is widely used in various fields of life and is also increasingly entering the daily life of ordinary people. The main sources of sewage are generally divided into production sewage treatment and domestic sewage treatment. Production sewage includes industrial sewage, agricultural sewage, etc., while domestic sewage is the sewage generated in daily life.

[0003] In sewage treatment, the membrane bioreactor process (MBR) is adopted. The effluent quality of the MBR process is good, which can ensure better removal of SS and TP. And since microorganisms are completely intercepted in the bioreactor, it is beneficial to the interception and growth of microorganisms with slow proliferation such as nitrifying bacteria, and the nitrification efficiency of the system is improved.

[0004] However, before the existing sewage enters the membrane bioreactor, most of it remains some solid impurities inside. If not filtered, it is very easy to cause the filter membrane inside the membrane bioreactor to be blocked, and it takes a lot of time for the staff to dredge it.

[0005] Therefore, it is necessary to provide a new high-efficiency biological fermentation sewage treatment device to solve the above technical problems. Summary of the Utility Model

[0006] To solve the above technical problems, the utility model provides a high-efficiency biological fermentation sewage treatment device, which solves the problem that before the existing sewage enters the membrane bioreactor, most of it remains some solid impurities inside. If not filtered, it is very easy to cause the filter membrane inside the membrane bioreactor to be blocked.

[0007] The high-efficiency biological fermentation sewage treatment device provided by the utility model includes a treatment tank. A membrane bioreactor is arranged inside the treatment tank. A pretreatment tank is arranged on one side of the membrane bioreactor. The bottom of the pretreatment tank is fixed on the bottom of the treatment tank through a plurality of support legs;

[0008] Two filter mesh plates are symmetrically fixed inside the pretreatment tank. The two filter mesh plates are arranged in a V shape. A plurality of water inlet pipes are arranged at intervals on the top of the pretreatment tank. The water inlet pipes are located directly above the filter mesh plates. A plurality of water outlet pipes are arranged at intervals on the bottom of the pretreatment tank. The water outlet pipes are communicated with the water inlet end of the membrane bioreactor;

[0009] There is a discharge box fixed between the two filter plates. A conveying auger is movably arranged at the bottom of the discharge box, and a mounting shaft is movably arranged at the top of the discharge box. Sealing plates are fixed on both sides of the mounting shaft.

[0010] Scrapers are arranged above the two filter plates. One side of each scraper is fixed with a push rod, and the end of the push rod away from the scraper extends outside the pretreatment tank.

[0011] In a preferred embodiment, one end of the mounting shaft extends out of the discharge box and is equipped with a first sprocket. A worm gear is installed on the mounting shaft.

[0012] Two limit seats are fixedly arranged at intervals on one side of the discharge box. A worm is movably arranged between the two limit seats, and the worm meshes with the worm gear.

[0013] The central shaft of the conveying auger penetrates through the pretreatment tank and is equipped with a second sprocket. The first sprocket and the second sprocket are connected by a chain.

[0014] The bottom of the discharge box is communicated with a discharge pipe, and the bottom of the discharge pipe extends outside the discharge box.

[0015] In a preferred embodiment, the worm gear, the worm, the first sprocket and the second sprocket all adopt enclosed drive.

[0016] In a preferred embodiment, a waterproof motor is installed on one side of the pretreatment tank, and the output end of the waterproof motor is connected to the worm through a coupling.

[0017] The beneficial effects of the present utility model:

[0018] 1. When the sewage treatment device is in use, the sewage to be treated can be first introduced into the pretreatment tank through the water inlet pipe. At this time, the filter plates can filter out large impurities in the sewage. The sewage after filtration can enter the membrane bioreactor through the water outlet pipe for the next step of sewage treatment. By further filtering large impurities in the sewage, the service life of the membrane bioreactor can be increased, and its maintenance frequency is greatly reduced.

[0019] 2. When it is necessary to clean the surface of the filter plates, at this time, the staff can drive the scraper to push the solid impurities on the surface of the filter plates to the bottom of the filter plates by moving the push rod, and then start the motor to make the sealing plates rotate, accelerating the speed of the impurities entering the discharge box. At the same time, the conveying auger rotates to discharge the impurities entering the discharge box from the discharge pipe for the staff to collect. Description of the Drawings

[0020] Figure 1Stereoscopic view of the main structure of the high-efficiency biological fermentation sewage treatment device provided by the present utility model;

[0021] Figure 2 is Figure 1 The enlarged structural schematic diagram of A shown;

[0022] Figure 3 Plan view of the main structure of the high-efficiency biological fermentation sewage treatment device provided by the present utility model Figure 1 ;

[0023] Figure 4 Plan view of the main structure of the high-efficiency biological fermentation sewage treatment device provided by the present utility model Figure 2 ;

[0024] Figure 5 Structural schematic diagram of the pretreatment tank provided by the present utility model.

[0025] Reference numerals in the figure: 1, treatment tank; 2, membrane bioreactor; 3, pretreatment tank; 4, support leg; 5, filter mesh plate; 6, water inlet pipe; 7, water outlet pipe; 8, discharge box; 9, conveying auger; 10, mounting shaft; 11, worm gear; 12, first sprocket; 13, limit seat; 14, worm; 15, second sprocket; 16, discharge pipe; 17, scraper; 18, push rod; 19, water inlet end; 20, closing plate; 21, waterproof motor. Specific embodiments

[0026] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , wherein Figure 1 Stereoscopic view of the main structure of the high-efficiency biological fermentation sewage treatment device provided by the present utility model; Figure 2 is Figure 1 The enlarged structural schematic diagram of A shown; Figure 3 Plan view of the main structure of the high-efficiency biological fermentation sewage treatment device provided by the present utility model Figure 1 ; Figure 4 Plan view of the main structure of the high-efficiency biological fermentation sewage treatment device provided by the present utility model Figure 2 ; Figure 5 Structural schematic diagram of the pretreatment tank provided by the present utility model.

[0028] In the specific implementation process, as Figures 1 - 5As shown in the figure, it includes a treatment tank 1. Inside the treatment tank 1, a membrane bioreactor 2 is arranged. On one side of the membrane bioreactor 2, a pretreatment tank 3 is arranged. The bottom of the pretreatment tank 3 is fixed to the bottom of the treatment tank 1 through a number of support legs 4. Inside the pretreatment tank 3, two filter mesh plates 5 are symmetrically fixed. The two filter mesh plates 5 are arranged in a V shape. A number of water inlet pipes 6 are arranged at an interval with the top of the pretreatment tank 3. The water inlet pipes 6 are located directly above the filter mesh plates 5. A number of water outlet pipes 7 are arranged at an interval at the bottom of the pretreatment tank 3. The water outlet pipes 7 are connected to the water inlet end 19 of the membrane bioreactor 2. When this sewage treatment device is in use, the sewage to be treated can be first introduced into the pretreatment tank 3 through the water inlet pipes 6. At this time, the filter mesh plates 5 can filter out the large impurities in the sewage. The sewage after filtration can enter the membrane bioreactor 2 from the water outlet pipes 7 for the next step of sewage treatment. By further filtering the large impurities in the sewage, the service life of the membrane bioreactor 2 can be increased, and its maintenance frequency is greatly reduced.

[0029] An outlet box 8 is fixed between the two filter mesh plates 5. A conveying auger 9 is movably arranged at the bottom of the outlet box 8. An installation shaft 10 is movably arranged at the top of the outlet box 8. On both sides of the installation shaft 10, closing plates 20 are fixed. During the normal filtration process, the closing plates 20 are in a horizontal posture.

[0030] One end of the installation shaft 10 extends out of the outlet box 8 and is equipped with a first sprocket 12. A worm gear 11 is installed on the installation shaft 10. Two limit seats 13 are fixed at an interval on one side of the outlet box 8. A worm 14 is movably arranged between the two limit seats 13. The worm 14 meshes with the worm gear 11. The central shaft of the conveying auger 9 passes through the pretreatment tank 3 and is equipped with a second sprocket 15. The first sprocket 12 and the second sprocket 15 are connected by a chain. A waterproof motor 21 is installed on one side of the pretreatment tank 3. The output end of the waterproof motor 21 is connected to the worm 14 through a coupling. The bottom of the outlet box 8 is communicated with a discharge pipe 16. The bottom of the discharge pipe 16 extends out of the outside of the outlet box 8. Above the two filter mesh plates 5, a scraper 17 is arranged. One side of the scraper 17 is fixed with a push rod 18. The end of the push rod 18 away from the scraper 17 extends out of the pretreatment tank 3. When it is necessary to clean the surface of the filter mesh plates 5, at this time, the staff can drive the scraper 17 to push the solid impurities on the surface of the filter mesh plates 5 to the bottom of the filter mesh plates 5 by moving the push rod 18, and then start the motor 21 to drive the worm 14 to rotate. Under the transmission of the worm 14, the worm gear 11, the first sprocket 12 and the second sprocket 15, the installation shaft 10 drives the closing plates 20 to rotate, accelerating the speed of the impurities entering the outlet box 8. At the same time, the conveying auger 9 rotates to discharge the impurities entering the outlet box 8 from the discharge pipe 16 for the staff to collect.

[0031] The worm gear 11, the worm 14, the first sprocket 12 and the second sprocket 15 all adopt closed transmission, increasing their service life and greatly reducing their maintenance frequency.

[0032] Working principle of the utility model: When this sewage treatment device is in use, the sewage to be treated can be first introduced into the interior of the pretreatment tank 3 through the water inlet pipe 6. At this time, the filter screen plate 5 can filter out large impurities in the sewage. After the filtration, the sewage can enter the membrane bioreactor 2 through the water outlet pipe 7 for the next step of sewage treatment. By further filtering large impurities in the sewage, the service life of the membrane bioreactor 2 can be increased, and its maintenance frequency can be greatly reduced.

[0033] When it is necessary to clean the surface of the filter screen plate 5, at this time, the staff can drive the scraper 17 through the movable push rod 18 to push the solid impurities on the surface of the filter screen plate 5 to the bottom of the filter screen plate 5. Then start the motor 21 to drive the worm 14 to rotate. Under the transmission of the worm 14, the worm gear 11, the first sprocket 12 and the second sprocket 15, the mounting shaft 10 drives the closing plate 20 to rotate, accelerating the speed of impurities entering the discharge box 8. At the same time, the conveying auger 9 rotates to discharge the impurities entering the discharge box 8 from the discharge pipe 16 for the staff to collect.

[0034] The circuits and controls involved in the utility model are all prior arts and will not be elaborated here.

[0035] The above are only the embodiments of the utility model, and do not limit the patent scope of the utility model accordingly. Any equivalent structure or equivalent process transformation made by using the description and drawings of the utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the utility model.

Claims

1. A high-efficiency biological fermentation wastewater treatment device, comprising a treatment tank (1), characterized in that: A membrane bioreactor (2) is arranged inside the treatment tank (1), a pretreatment box (3) is arranged on one side of the membrane bioreactor (2), and the bottom of the pretreatment box (3) is fixed to the bottom of the treatment tank (1) through a plurality of supporting legs (4); Two filter screens (5) are symmetrically fixed inside the pretreatment box (3), and the two filter screens (5) are arranged in a V shape. A plurality of water inlet pipes (6) are arranged at intervals on the top of the pretreatment box (3), and the water inlet pipes (6) are located directly above the filter screens (5). A plurality of water outlet pipes (7) are arranged at intervals on the bottom of the pretreatment box (3), and the water outlet pipes (7) are connected to the water inlet end (19) of the membrane bioreactor (2); A discharge box (8) is fixed between the two filter screen plates (5), a conveying auger (9) is movably provided at the bottom of the discharge box (8), a mounting shaft (10) is movably provided at the top of the discharge box (8), and closing plates (20) are fixed on both sides of the mounting shaft (10); A scraper (17) is provided above the two filter screen plates (5), a push rod (18) is fixed to one side of the scraper (17), and one end of the push rod (18) away from the scraper (17) extends to the outside of the pretreatment box (3).

2. The high-efficiency biological fermentation wastewater treatment device according to claim 1 is characterized in that: One end of the installation shaft (10) extends out of the discharge box (8) and is installed with a first sprocket (12), and a worm gear (11) is installed on the installation shaft (10); Two limiting seats (13) are fixed at intervals on one side of the discharge box (8), a worm (14) is movably arranged between the two limiting seats (13), and the worm (14) is meshed with the worm wheel (11); The central axis of the conveying auger (9) passes through the pre-treatment box (3) and is installed with a second sprocket (15), and the first sprocket (12) and the second sprocket (15) are connected by a chain; The bottom of the discharge box (8) is connected to a discharge pipe (16), and the bottom of the discharge pipe (16) extends out of the discharge box (8).

3. The high-efficiency biological fermentation wastewater treatment device according to claim 2 is characterized in that: The worm wheel (11), the worm (14), the first sprocket (12) and the second sprocket (15) all adopt closed transmission.

4. The high-efficiency biological fermentation wastewater treatment device according to claim 3 is characterized in that: A waterproof motor (21) is installed on one side of the pretreatment box (3), and the output end of the waterproof motor (21) is connected to the worm (14) via a coupling.

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