Sewage biochemical treatment equipment

Abstract

The utility model relates to the technical field of biological sewage treatment, in particular to biochemical sewage treatment equipment, which comprises a reaction tank, an aeration component, a liquid pumping component and a sedimentation tank. According to the utility model, sewage added into the reaction tank is primarily filtered through the sieve plate, the pretreated sewage is mixed with activated sludge in the reaction tank for biochemical reaction, and meanwhile, sufficient air is provided through the liftable aeration assembly to ensure the activity of microorganisms; a liquid inlet pipe of the liquid pumping assembly floats on the surface of the sewage under the buoyancy support of a floating ball so as to pump supernatant liquid of the sewage and guide the supernatant liquid into a sedimentation tank for natural sedimentation, and the supernatant liquid after sedimentation is discharged through a discharge port, so that the aeration head can be conveniently lifted from the sewage to be overhauled; the lower-layer sludge returns to the reaction tank through the recovery pipe to participate in the reaction, so that the utilization rate of the activated sludge and the biochemical reaction efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage biological treatment, and specifically relates to sewage biochemical treatment equipment. Background Art

[0002] The existing biochemical treatment of sewage usually involves introducing the sewage after preliminary filtration into a reaction tank with activated sludge added for biochemical reaction. The organic matter in the sewage is mainly converted into simple inorganic matter by the decomposition action of microorganisms in the activated sludge, so that the sewage is purified, and then the purified sewage is subsequently disinfected to meet the prescribed emission standards.

[0003] In the prior art, sewage biochemical treatment equipment is usually equipped with an aeration system to inject air or oxygen into the sewage to provide the oxygen required for microbial growth and promote the degradation of organic matter in the sewage. However, conventional aeration pipes are usually laid at the bottom of the reaction tank, which is not convenient for inspection and maintenance. At the same time, when extracting the upper clear liquid of the sewage, part of the activated sludge will inevitably be extracted together, resulting in a decrease in the effect of the sewage biochemical reaction.

[0004] Therefore, a sewage biochemical treatment equipment is proposed, which adopts a lifting aeration system, can lift the aeration pipe from the sewage for maintenance, and is also provided with an activated sludge recovery system, which improves the utilization rate of activated sludge and the effect of sewage biochemical reaction. Utility Model Content

[0005] In order to overcome the problem that the existing sewage biochemical treatment equipment is not convenient for maintenance of the aeration system and the loss of activated sludge is large, resulting in reduced biochemical reaction effect.

[0006] The technical solution of the utility model is: a sewage biochemical treatment equipment, comprising a reaction tank, a feed pipe fixedly connected to the upper edge of the left end of the reaction tank, an inspection staircase fixedly connected to the rear end of the reaction tank, a support platform fixedly connected to the upper edge of the right end of the reaction tank, a sedimentation tank fixedly connected to the lower end of the support platform, a discharge pipe fixedly connected to the right end of the sedimentation tank and a recovery pipe fixedly connected to the lower end of the sedimentation tank, the feed pipe is used to transport sewage, an aeration component for providing oxygen is arranged at the upper end of the inspection staircase, a liquid extraction component for extracting supernatant liquid is arranged at the upper end of the support platform, the recovery pipe is used to recover activated sludge, and the other end of the recovery pipe is fixedly connected to the lower edge of the right end of the reaction tank; the internal spaces of the sedimentation tank, the recovery pipe and the reaction tank are connected, and a valve is installed on the recovery pipe.

[0007] Preferably, the device performs preliminary filtration on the sewage added to the reaction tank by means of an inclined sieve plate, and the intercepted solid waste will fall into the waste pool through the slag outlet for unified cleaning, and the pretreated sewage will be mixed with the activated sludge in the reaction tank for biochemical reaction, and a liftable aeration component is provided. While providing sufficient air to ensure the activity of microorganisms, it is convenient to drive the aeration head to rise from the sewage for maintenance through an electric cylinder, and a liquid pumping component is provided. The liquid inlet pipe floats on the sewage surface under the buoyancy support of the float, and the upper clear liquid is extracted in a targeted manner and discharged into the sedimentation tank for natural sedimentation. The upper sewage after sedimentation will be discharged through the outlet, and the lower sludge will return to the reaction tank through the recovery pipe to participate in the reaction, thereby improving the utilization rate of the activated sludge and the efficiency of the biochemical reaction.

[0008] Preferably, the aeration assembly includes an air compressor, an air supply hose, an air collecting bin, an aeration head and an electric cylinder; the upper end of the maintenance staircase is fixedly connected to the air compressor; the air outlet end of the air compressor is fixedly connected to the air collecting bin; the other end of the air supply hose is through-connected to the air collecting bin; the air collecting bin is an internally hollow annular structure; the lower end of the air collecting bin is through-connected to a plurality of aeration heads evenly distributed in a circle about the center of the air collecting bin; the air supply hose, the air collecting bin, the aeration head and the internal space of the reaction tank are connected; by providing the aeration assembly, the air inlet end of the air compressor absorbs fresh air from the outside, which is compressed by the air compressor and transported to the air collecting bin along the air supply hose, and finally the compressed air is released as tiny bubbles through the electric cylinder, and the oxygen is effectively and evenly mixed into the sewage inside the reaction tank through the impact and stirring of the bubbles, which helps to improve the growth rate of microorganisms in the activated sludge and the degradation efficiency of organic matter.

[0009] Preferably, a support block is fixedly connected to the front edge of the upper end of the reaction tank; the support block is an L-shaped structure; an electric cylinder is fixedly connected to the upper end of the support block; the output shaft of the electric cylinder passes through the support block and is fixedly connected to the upper end of the gas collecting bin; through the provision of the electric cylinder, the gas collecting bin can be driven to rise and fall synchronously by the extension and retraction of the output shaft of the electric cylinder, and the design of the gas transmission hose as a hose material helps the gas transmission hose to move synchronously with the rise and fall of the gas collecting bin. Compared with conventional bottom-laid aeration pipes, this aeration assembly is easier to inspect and maintain, and quick inspection can be achieved by only starting the electric cylinder to lift the gas collecting bin from the bottom of the reaction tank.

[0010] Preferably, the liquid pumping assembly includes a vertical pipeline pump, a liquid inlet hose, a fixed ring, a float and a liquid outlet pipe; the upper end of the support platform is fixedly connected to the vertical pipeline pump; the liquid inlet hose is fixedly connected to the liquid inlet end of the vertical pipeline pump; the other end of the liquid inlet hose is movably arranged inside the reaction tank; the outer wall of the liquid inlet hose is fixedly connected to the fixed ring; the lower end of the fixed ring is fixedly connected to a plurality of floats uniformly distributed in a circle about the center of the fixed ring; the liquid outlet end of the vertical pipeline pump is fixedly connected to the liquid outlet pipe; the other end of the liquid outlet pipe is located inside the sedimentation tank; when the liquid inlet hose is placed in the sewage in the reaction tank, the liquid inlet hose will float on the upper layer of the sewage under the buoyancy support of the float, and at the same time, through the setting of the fixed ring, the liquid inlet of the liquid inlet hose can be kept in a stable downward state, which helps to specifically remove the upper clear liquid of the sewage for subsequent treatment, and avoid excessive removal of activated sludge at the bottom of the sewage, thereby causing a decrease in the biochemical reaction capacity in the reaction tank.

[0011] Preferably, an inclined sieve plate is fixed to the inner wall of the reaction tank; the sieve plate is located below the discharge port of the feed pipe; through the setting of the sieve plate, the sewage is pre-treated, which helps to remove larger solid matter in the sewage, such as cloth, branches, etc., thereby improving the biochemical treatment efficiency and reducing maintenance costs.

[0012] Preferably, a slag outlet is provided at the left end of the reaction tank; the lower end surface inside the slag outlet is in contact with the upper edge of the left end of the sieve plate; a baffle is rotatably installed on the inner wall of the slag outlet; a motor is fixedly connected to the left edge of the rear end of the reaction tank; the output shaft of the motor passes through the reaction tank and is fixedly connected to the rear end of the baffle; a waste pool is fixedly connected to the left end of the reaction tank; the waste pool is a rectangular structure with an open upper end; the upper end of the waste pool is flush with the lower end surface inside the slag outlet; through the setting of the baffle, the baffle is in a closed state when sewage is fed, so that sewage flows into the interior of the reaction tank through the sieve plate, and a larger volume of solid waste will be intercepted at the upper end of the sieve plate and accumulated near the slag outlet under the action of its own gravity. When the sewage feeding is completed, the motor is started, and the output shaft of the motor will drive the baffle to rotate, open the slag outlet, so that the solid waste passes through the slag outlet and flows into the waste pool for unified cleaning, which helps to achieve rapid cleaning of solid waste and reduce cleaning costs.

[0013] Preferably, the sedimentation tank is a bucket-type structure with an open upper end; through the design of the bucket-type structure of the sedimentation tank, the flow of sewage is accelerated by gravity, which helps to promote the solid particles in the sewage to settle to the bottom and form a sludge layer.

[0014] Beneficial effects of the utility model:

[0015] 1. Through the setting of the electric cylinder, the output shaft of the electric cylinder can be extended and retracted to drive the gas collection bin to rise and fall synchronously. The design of the gas delivery hose as a hose material helps the gas delivery hose to move synchronously with the rise and fall of the gas collection bin. Compared with the conventional bottom-laying aeration pipeline, this aeration component is easier to inspect and maintain. It only needs to start the electric cylinder to lift the gas collection bin from the bottom of the reaction tank to achieve rapid inspection and maintenance;

[0016] 2. When the liquid inlet hose is placed in the sewage in the reaction tank, it will float on the upper layer of the sewage under the buoyancy support of the float. At the same time, the setting of the fixed ring can keep the liquid inlet of the liquid inlet hose stable with the liquid inlet facing downward, which is helpful to take out the upper clear liquid of the sewage for subsequent treatment. At the same time, the sedimentation tank is set to help the solid particles in the clear liquid to naturally settle into sludge again, and return to the reaction tank through the recovery pipe, thereby improving the utilization rate of the activated sludge;

[0017] 3. Through the setting of the baffle, the baffle is in a closed state when sewage is fed, so that the sewage flows into the interior of the reaction tank through the sieve plate. Larger volumes of solid waste will be intercepted at the upper end of the sieve plate and accumulated near the slag outlet under the action of its own gravity. When the sewage feeding is completed, the motor is started, and the output shaft of the motor will drive the baffle to rotate, opening the slag outlet, so that the solid waste passes through the slag outlet and flows into the waste pool for unified cleaning, which helps to achieve rapid cleaning of solid waste and reduce cleaning costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 What is shown is a first three-dimensional structural schematic diagram of a sewage biochemical treatment device of the utility model;

[0019] Figure 2 What is shown is a second three-dimensional structural schematic diagram of a sewage biochemical treatment device of the utility model;

[0020] Figure 3 What is shown is a three-dimensional structural schematic diagram of an aeration component of a sewage biochemical treatment device of the utility model;

[0021] Figure 4 The three-dimensional structure schematic diagram of a liquid extraction component of a sewage biochemical treatment device of the utility model is shown;

[0022] Figure 5 What is shown is a partial cross-sectional three-dimensional structural schematic diagram of a sewage biochemical treatment device of the present utility model.

[0023] The markings in the attached drawings are: 1. reaction tank; 2. feed pipe; 3. maintenance stairs; 401. air compressor; 402. gas hose; 403. gas collecting bin; 404. aeration head; 405. electric cylinder; 5. support platform; 601. vertical pipeline pump; 602. liquid inlet hose; 603. fixing ring; 604. float; 605. liquid outlet pipe; 7. sedimentation tank; 8. discharge pipe; 9. recovery pipe; 10. valve; 11. support block; 12. sieve plate; 13. slag outlet; 14. baffle; 15. motor; 16. waste tank. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Example 1

[0026] See also Figure 1 The sewage biochemical treatment equipment described in the utility model includes a reaction tank 1. A feed pipe 2 for conveying sewage is fixedly connected to the upper edge of the left end of the reaction tank 1, and a maintenance staircase 3 is fixedly connected to the rear end of the reaction tank 1. An aeration component for providing oxygen is arranged at the upper end of the maintenance staircase 3, a support platform 5 is fixedly connected to the upper edge of the right end of the reaction tank 1, a liquid collection component for extracting supernatant liquid is arranged at the upper end of the support platform 5, and a sedimentation tank 7 for sedimentation is fixedly connected to the lower end of the support platform 5. A discharge pipe 8 is fixedly connected to the right end of the sedimentation tank 7, and a recovery pipe 9 for recovering activated sludge is fixedly connected to the lower end of the sedimentation tank 7, and the other end of the recovery pipe 9 is fixedly connected to the lower edge of the right end of the reaction tank 1. A valve 10 is installed on the recovery pipe 9.

[0027] The internal spaces of the sedimentation tank 7 , the recovery pipe 9 and the reaction tank 1 are connected.

[0028] See also Figure 2 , Figure 5 In this embodiment, the inner wall of the reaction tank 1 is fixedly connected with an inclined sieve plate 12, which is located below the discharge port of the feed pipe 2. A slag discharge port 13 is provided through the left end of the reaction tank 1, and the lower end surface of the slag discharge port 13 is in contact with the upper edge of the left end of the sieve plate 12. A baffle plate 14 is rotatably mounted on the inner wall of the slag discharge port 13. A motor 15 is fixedly connected to the left edge of the rear end of the reaction tank 1. The output shaft of the motor 15 passes through the reaction tank 1 and is fixed to the rear end of the baffle plate 14. A waste tank 16 is fixedly connected to the left end of the reaction tank 1. The waste tank 16 is a rectangular parallelepiped structure with an open upper end. The upper end of the waste tank 16 is flush with the lower end surface of the slag discharge port 13. The sedimentation tank 7 is a bucket-type structure with an open upper end.

[0029] See also Figure 4In this embodiment, the liquid extraction assembly includes a vertical pipeline pump 601, a liquid inlet hose 602, a fixed ring 603, a float 604 and a liquid outlet pipe 605. The upper end of the support platform 5 is fixedly connected to the vertical pipeline pump 601, and the liquid inlet hose 602 is fixedly connected to the liquid inlet end of the vertical pipeline pump 601. The other end of the liquid inlet hose 602 is movably arranged inside the reaction tank 1, and the outer wall of the liquid inlet hose 602 is fixedly connected to the fixed ring 603, and the lower end of the fixed ring 603 is fixedly connected to a plurality of floats 604 uniformly distributed in a circle about the center of the fixed ring 603. The liquid outlet end of the vertical pipeline pump 601 is fixedly connected to the liquid outlet pipe 605, and the other end of the liquid outlet pipe 605 is located inside the sedimentation tank 7.

[0030] In this embodiment: when in use, sewage is first added to the interior of the reaction tank 1 through the feed pipe 2. Large solid waste such as branches and plastics mixed in the sewage will be intercepted by the sieve plate 12, so that the sewage after pre-filtration treatment flows into the interior of the reaction tank 1 and mixes with the activated sludge containing a large number of microorganisms at the bottom of the reaction tank 1 to perform biochemical reactions. At the same time, the aeration component is turned on to continuously inject air or oxygen into the sewage to provide oxygen required for microbial growth and promote the degradation of organic matter in the sewage. When the sewage is added and the reaction begins, the motor 15 is started, and the output shaft of the motor 15 drives the baffle 14 to rotate, and the slag outlet 13 is opened, so that the solid waste passes through the slag outlet 13 and flows into the waste pool 16 for unified cleaning.

[0031] After the sewage has undergone a period of biochemical reaction, the vertical pipeline pump 601 is started. Under the buoyancy support of the float 604, the vertical pipeline pump 601 floating on the sewage surface will extract the upper layer of clear liquid and discharge it into the sedimentation tank 7 through the liquid outlet pipe 605. After entering the sedimentation tank 7, this part of the clear liquid will undergo natural sedimentation, and the solid particles in the sewage will settle to the bottom and re-form sludge. At this time, the clearer sewage in the upper layer of the sedimentation tank 7 is extracted through the discharge pipe 8 for subsequent disinfection treatment, and the activated sludge in the lower layer will re-enter the interior of the reaction tank 1 through the recovery pipe 9 by opening the valve 10 to participate in the biochemical reaction.

[0032] Example 2

[0033] See also Figure 3On the basis of Example 1, the present application provides a technical solution: the aeration assembly includes an air compressor 401, a gas hose 402, a gas collecting bin 403, an aeration head 404 and an electric cylinder 405. The upper end of the inspection staircase 3 is fixedly connected with the air compressor 401, the gas outlet end of the air compressor 401 is fixedly connected with the gas collecting bin 403, and the other end of the gas hose 402 is fixedly connected with the gas collecting bin 403 in a through-type manner. The gas collecting bin 403 is an internally hollow annular structure, and the lower end of the gas collecting bin 403 is fixedly connected with a plurality of aeration heads 404 that are evenly distributed circumferentially about the center of the gas collecting bin 403 in a through-type manner. The gas hose 402, the gas collecting bin 403, the aeration head 404 and the internal space of the reaction tank 1 are connected, and the front edge of the upper end of the reaction tank 1 is fixedly connected with a support block 11, and the support block 11 is an L-shaped structure, and the upper end of the support block 11 is fixedly connected with an electric cylinder 405. The output shaft of the electric cylinder 405 passes through the support block 11 and is fixed to the upper end of the air collecting bin 403 .

[0034] In this embodiment: when the aeration component needs to be inspected and maintained, the electric cylinder 405 is started, and the output shaft of the electric cylinder 405 begins to shrink, driving the air collecting bin 403 fixed at the lower end to start rising until the aeration head 404 is completely out of the sewage surface, and the maintenance personnel can climb the inspection stairs 3 to inspect and maintain the aeration component.

[0035] Working principle: When in use, first add sewage into the interior of the reaction tank 1 through the feed pipe 2. Large solid garbage such as branches and plastics mixed in the sewage will be intercepted by the sieve plate 12, so that the sewage after pre-filtration treatment flows into the interior of the reaction tank 1 and mixes with the activated sludge containing a large number of microorganisms at the bottom of the reaction tank 1 to carry out biochemical reactions. At the same time, the aeration component is turned on to continuously inject air or oxygen into the sewage to provide oxygen required for the growth of microorganisms and promote the degradation of organic matter in the sewage. When the sewage is added and the reaction begins, the motor 15 is started, and the output shaft of the motor 15 drives the baffle 14 to rotate, and the slag outlet 13 is opened, so that the solid garbage passes through the slag outlet 13 and flows into the waste tank 16 for unified cleaning;

[0036] After the sewage has undergone a period of biochemical reaction, the vertical pipeline pump 601 is started. Under the buoyancy support of the float 604, the vertical pipeline pump 601 floating on the sewage surface will extract the upper layer of clear liquid and discharge it into the sedimentation tank 7 through the liquid outlet pipe 605. After entering the sedimentation tank 7, this part of the clear liquid will undergo natural sedimentation, and the solid particles in the sewage will settle to the bottom and re-form sludge. At this time, the clearer sewage in the upper layer of the sedimentation tank 7 will be extracted through the discharge pipe 8 for subsequent disinfection treatment, and the activated sludge in the lower layer will re-enter the interior of the reaction tank 1 through the recovery pipe 9 by opening the valve 10 to participate in the biochemical reaction;

[0037] When the aeration assembly needs to be inspected and maintained, the electric cylinder 405 is started, and the output shaft of the electric cylinder 405 begins to shrink, driving the air collecting bin 403 fixed at the lower end to begin to rise until the aeration head 404 is completely out of the sewage surface. The maintenance personnel can then climb the inspection stairs 3 to inspect and maintain the aeration assembly.

[0038] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A sewage biochemical treatment device, comprising a reaction tank (1), characterized in that: The invention also comprises a feed pipe (2) fixedly connected to the upper edge of the left end of the reaction tank (1), a maintenance staircase (3) fixedly connected to the rear end of the reaction tank (1), a support platform (5) fixedly connected to the upper edge of the right end of the reaction tank (1), a sedimentation tank (7) fixedly connected to the lower end of the support platform (5), a discharge pipe (8) fixedly connected to the right end of the sedimentation tank (7), and a recovery pipe (9) fixedly connected to the lower end of the sedimentation tank (7). The feed pipe (2) is used to transport The upper end of the inspection staircase (3) is provided with an aeration assembly for providing oxygen, the upper end of the support platform (5) is provided with a liquid extraction assembly for extracting supernatant liquid, the recovery pipe (9) is used to recover activated sludge, and the other end of the recovery pipe (9) is fixedly connected to the lower edge of the right end of the reaction tank (1); the internal spaces of the sedimentation tank (7), the recovery pipe (9) and the reaction tank (1) are connected, and a valve (10) is installed on the recovery pipe (9).

2. A sewage biochemical treatment equipment according to claim 1, characterized in that: The aeration assembly comprises an air compressor (401), an air supply hose (402), an air collecting bin (403), an aeration head (404) and an electric cylinder (405); the air compressor (401) is connected to the upper end of the maintenance staircase (3); the air outlet end of the air compressor (401) is connected to the air supply hose (402); the other end of the air supply hose (402) is fixedly connected to the air collecting bin (403) in a through-type manner; the air collecting bin (403) is a circular ring structure with a hollow interior; the lower end of the air collecting bin (403) is fixedly connected to a plurality of aeration heads (404) uniformly distributed in a circle about the center of the air collecting bin (403); the air supply hose (402), the air collecting bin (403), the aeration head (404) and the internal space of the reaction tank (1) are connected.

3. A sewage biochemical treatment equipment according to claim 2, characterized in that: A support block (11) is fixedly connected to the front edge of the upper end of the reaction pool (1), and the support block (11) is an L-shaped structure. An electric cylinder (405) is fixedly connected to the upper end of the support block (11), and the output shaft of the electric cylinder (405) passes through the support block (11) and is fixedly connected to the upper end of the gas collecting bin (403).

4. The sewage biochemical treatment equipment according to claim 1, characterized in that: The liquid extraction assembly comprises a vertical pipeline pump (601), a liquid inlet hose (602), a fixing ring (603), a floating ball (604) and a liquid outlet pipe (605); the upper end of the support platform (5) is fixedly connected to the vertical pipeline pump (601); the liquid inlet hose (602) is fixedly connected to the liquid inlet end of the vertical pipeline pump (601); the other end of the liquid inlet hose (602) is movably arranged inside the reaction tank (1); the outer wall of the liquid inlet hose (602) is fixedly connected to the fixing ring (603); the lower end of the fixing ring (603) is fixedly connected to a plurality of floating balls (604) uniformly distributed in a circle about the center of the fixing ring (603); the liquid outlet pipe (605) is fixedly connected to the liquid outlet end of the vertical pipeline pump (601); the other end of the liquid outlet pipe (605) is located inside the sedimentation tank (7).

5. The sewage biochemical treatment equipment according to claim 1, characterized in that: The inner wall of the reaction tank (1) is fixedly connected with a sieve plate (12) placed obliquely; the sieve plate (12) is located below the discharge port of the feed pipe (2).

6. A sewage biochemical treatment equipment according to claim 5, characterized in that: The left end of the reaction pool (1) is provided with a slag outlet (13); the lower end surface of the slag outlet (13) is in contact with the upper edge of the left end of the sieve plate (12); a baffle (14) is rotatably mounted on the inner wall of the slag outlet (13); a motor (15) is fixedly connected to the left edge of the rear end of the reaction pool (1); the output shaft of the motor (15) passes through the reaction pool (1) and is fixedly connected to the rear end of the baffle (14); a waste pool (16) is fixedly connected to the left end of the reaction pool (1); the waste pool (16) is a rectangular parallelepiped structure with an open upper end; the upper end of the waste pool (16) is flush with the lower end surface of the slag outlet (13).

7. The sewage biochemical treatment equipment according to claim 1, characterized in that: The sedimentation tank (7) is a bucket-shaped structure with an open upper end.

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