A sludge storage tank

Abstract

The present invention discloses a sludge storage tank, comprising a sludge storage tank, a sedimentation device, an aeration device and an overflow pipe, wherein the sedimentation device is installed in the sludge storage tank, the sedimentation device is connected with the sludge storage tank, the aeration device is installed at the bottom of the sludge storage tank, and the overflow pipe is installed at the upper end of the sedimentation device. The sludge storage tank system provided by the present invention is a sludge storage tank system that always retains the sludge in the aeration device outside the sedimentation device through the sedimentation device. Due to the presence of the aeration device, the remaining sludge is always in a highly aerobic state. Due to the severe lack of carbon sources and the highly aerobic environment, the secondary phosphorus release of the remaining sludge discharged from the outside will be greatly delayed, thereby realizing the function of delayed phosphorus release of the sludge storage tank delayed phosphorus release device.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a sludge storage tank. Background Art

[0002] After the biochemical excess sludge and physicochemical sludge of the sewage treatment plant are discharged into the sludge storage tank, if they cannot be dehydrated in time, it is easy to produce secondary phosphorus release under anaerobic conditions, affecting the stable discharge of total phosphorus in the effluent of the sewage treatment plant, increasing the use of phosphorus removal agents in the sewage treatment plant, and increasing the operating costs of the sewage treatment plant.

[0003] This phenomenon is particularly serious in small and medium-sized decentralized sewage treatment sites. When regular dehydration or external transportation is adopted, the secondary phosphorus release of residual sludge is more serious, which can easily lead to the decentralized sewage treatment site's total phosphorus discharge failing to meet the standard all year round.

[0004] Therefore, how to solve the problem of secondary phosphorus release from excess sludge in sewage treatment plants is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a sludge storage tank, in which the residual sludge discharged from the outside is separated from water by a sedimentation device, and the sludge is always retained in the external aeration area of ​​the sludge storage tank, so that the secondary phosphorus release of the residual sludge discharged from the outside is greatly delayed, thereby realizing the function of delayed phosphorus release of the delayed phosphorus release device.

[0006] In order to solve the above technical problems, the present invention provides a sludge storage tank, including a sludge storage tank, a sedimentation device, an aeration device and an overflow pipe, the sedimentation device is installed in the sludge storage tank, the sedimentation device is connected to the sludge storage tank, the aeration device is installed at the bottom of the sludge storage tank and is used to blow in air, and the overflow pipe is installed at the upper end of the sedimentation device.

[0007] Preferably, the sludge storage tank further comprises a sludge lifting device disposed in the sedimentation device and used for discharging the sludge in the sedimentation device into the sludge storage tank.

[0008] Preferably, the mud lifting device comprises a suction pipe and a fan connected to the suction pipe, one end of the suction pipe extends to the bottom of the sedimentation device, and the other end of the suction pipe is connected to the mud storage tank through the fan.

[0009] Preferably, the aeration device is installed at the bottom of the mud storage tank through a fixing frame, and the other end of the aeration device is connected to the fan through a connecting pipe.

[0010] Preferably, the aeration device is an air supply pipe with air holes.

[0011] Preferably, a mud inlet pipe is provided above the mud storage tank, the mud inlet pipe is higher than the liquid level of the liquid inlet of the sedimentation device, and the overflow pipe is lower than the liquid level of the mud inlet pipe.

[0012] Preferably, the overflow pipe is higher than the liquid level of the liquid inlet of the precipitation device.

[0013] Preferably, a filter screen is provided at the discharge port of the overflow pipe.

[0014] The sludge storage tank provided by the present invention mainly includes a sludge storage tank, a sedimentation device, an aeration device and an overflow pipe. The sedimentation device is installed in the sludge storage tank, the sedimentation device is connected to the sludge storage tank, the aeration device is installed at the bottom of the sludge storage tank, and the overflow pipe is installed at the upper end of the sedimentation device. The sludge storage tank system provided by the present invention is a sludge storage tank system that always retains the sludge in the aeration device outside the sedimentation device through the sedimentation device. Due to the presence of the aeration device, the remaining sludge is always in a highly aerobic state. Due to the severe lack of carbon sources and the highly aerobic environment, the secondary phosphorus release of the remaining sludge discharged from the outside will be greatly delayed, thereby realizing the function of delayed phosphorus release of the sludge storage tank delayed phosphorus release device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the overall structure of a specific implementation method provided by the present invention;

[0017] Figure 2 for Figure 1 a top plan view of the structure shown;

[0018] Figure 3 for Figure 1 Bottom plan view of the structure shown.

[0019] in, Figure 1-Figure 3 middle:

[0020] Mud storage tank—1, sedimentation device—2, aeration device—3, overflow pipe—4, mud lifting device—5, mud inlet pipe—6. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Please refer to Figures 1 to 3 , Figure 1 A schematic diagram of the overall structure of a specific implementation method provided by the present invention; Figure 2 for Figure 1 a top plan view of the structure shown; Figure 3 for Figure 1 Bottom plan view of the structure shown.

[0023] In a specific embodiment provided by the present invention, the sludge storage tank mainly includes a sludge storage tank 1, a sedimentation device 2, an aeration device 3 and an overflow pipe 4, the sedimentation device 2 is installed in the sludge storage tank 1, the sedimentation device 2 is connected to the sludge storage tank 1, the aeration device 3 is installed at the bottom of the sludge storage tank 1, and the overflow pipe 4 is installed at the upper end of the sedimentation device 2.

[0024] The sedimentation device 2 is installed in the sludge storage tank 1 , the sedimentation device 2 is connected to the sludge storage tank 1 , the aeration device 3 is installed at the bottom of the sludge storage tank 1 , and the overflow pipe 4 is installed at the upper end of the sedimentation device 2 .

[0025] Specifically, in the actual operation process, the residual sludge enters the sludge storage tank 1 through the sludge inlet pipe 6, and the residual sludge in the sludge storage tank 1 enters the sedimentation device 2 under the action of the liquid level difference to achieve mud-water separation, and the separated supernatant is discharged from the sludge storage tank through the supernatant overflow pipe 4. At the same time, the separated sludge sinks to the bottom of the sedimentation device 2 under the action of gravity, and is lifted by the sludge lifting device 5 from the bottom to the aeration device 3 outside the sedimentation device 2, and this cycle is repeated. After the residual sludge discharged from the outside is separated from the mud and water by the sedimentation device 2, the sludge is always retained in the aeration device 3 outside the sedimentation device 2 in the sludge storage tank 1. Due to the presence of the aeration device 3, the residual sludge is always in a highly aerobic state. Due to the severe lack of carbon source and the highly aerobic environment, the secondary phosphorus release of the residual sludge discharged from the outside will be greatly delayed, thereby realizing the function of delayed phosphorus release of the sludge storage tank delayed phosphorus release device; in addition, under the condition of high aerobicity and no external carbon source supplement, sludge reduction can also be achieved. The sludge storage tank system provided by the present invention uses a sedimentation device to always retain the sludge in the sludge storage tank by an aeration device outside the sedimentation device. Due to the existence of the aeration device, the remaining sludge is always in a highly aerobic state. Due to the severe lack of carbon source and the highly aerobic environment, the secondary phosphorus release of the remaining sludge discharged from the outside will be greatly delayed, thereby realizing the function of delayed phosphorus release of the sludge storage tank delayed phosphorus release device.

[0026] In order to optimize the advantage of the sludge storage tank in the above embodiment that the sludge storage tank can slow down the secondary phosphorus release of the excess sludge, the sludge storage tank also includes a sludge lifting device 5 arranged in the sedimentation device 2 for discharging the sludge in the sedimentation device 2 into the sludge storage tank 1; the sludge lifting device 5 includes a suction pipe and a fan connected to the suction pipe, one end of the suction pipe extends to the bottom of the sedimentation device 2, and the other end of the suction pipe is connected to the sludge storage tank 1 through the fan, and the fan blows air into the sedimentation device 2 to form a negative pressure in the suction pipe, so that the airflow drives the sludge in the sedimentation device 2 to rise and be discharged into the sludge storage tank 1. Since the present invention slows down the secondary phosphorus release of the excess sludge by continuously circulating the sludge, a sludge lifting device 5 is arranged in the sedimentation device 2, so that the sludge deposited in the sedimentation device 2 can be lifted, and then discharged to the sludge storage tank 1, and circulated together with the next round of excess sludge, and each time the sludge passes through the aeration device 3 outside the sedimentation device 2, the sludge is in a high oxygen state, resulting in a significant delay in the secondary phosphorus release of the excess sludge discharged from the outside. Of course, the mud discharge driving device of the mud lifting device 5 can also be a water pump, through which the sludge in the sedimentation device 2 is sucked and discharged into the mud storage tank 1.

[0027] Furthermore, the aeration device 3 is installed at the bottom of the sludge storage tank 1 through a fixing frame, and the other end of the aeration device 3 is connected to the fan through a connecting pipe; the aeration device 3 is an air supply pipe with air holes. The blower makes the air supply pipe work by blowing in air, and the air supply pipe is provided with air holes. The air blown in by the blower can be released into the sludge through the air holes, so that the microorganisms in the sludge continue to realize the biological metabolism function and further improve the effluent water quality. Under the premise of ensuring the separation of mud and water, the effluent water quality is improved, and it has strong functionality. Of course, the aeration device 3 can also be other types of air supply equipment.

[0028] Furthermore, the overflow pipe 4 is higher than the liquid level of the liquid inlet of the sedimentation device 2. The sludge is pumped to the outside of the sedimentation device 2 including the sludge storage tank area where the aeration device 3 is located by a water pump or a blower, and the supernatant separated from the top of the sedimentation device 2 is discharged from the sludge storage tank 1 through the overflow pipe. In addition, a filter screen for filtering impurities is provided on the overflow pipe 4. When the water blower pumps the water separated from the mud and water, the filter screen can remove a small amount of impurities carried in the water, so that the discharged water is more in line with the discharge standard.

[0029] In summary, the sludge storage tank provided in this embodiment mainly includes a sludge storage tank, a sedimentation device, an aeration device and an overflow pipe. The sedimentation device is installed in the sludge storage tank, the sedimentation device is connected to the sludge storage tank, the aeration device is installed at the bottom of the sludge storage tank, and the overflow pipe is installed at the upper end of the sedimentation device. The sludge storage tank system provided by the present invention always retains the sludge in the sludge storage tank through the sedimentation device. The aeration device outside the sedimentation device, due to the presence of the aeration device, the remaining sludge is always in a highly aerobic state. Due to the severe lack of carbon sources and the highly aerobic environment, the secondary phosphorus release of the remaining sludge discharged from the outside will be greatly delayed, thereby realizing the function of delayed phosphorus release of the sludge storage tank delayed phosphorus release device.

[0030] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sludge storage tank, characterized in that: The invention comprises a sludge storage tank (1), a sedimentation device (2), an aeration device (3) and an overflow pipe (4), wherein the sedimentation device (2) is installed in the sludge storage tank (1), the sedimentation device (2) is connected to the sludge storage tank (1), the aeration device (3) is installed at the bottom of the sludge storage tank (1) and is used to blow air into the sludge storage tank (1), and the overflow pipe (4) is installed at the upper end of the sedimentation device (2); It also includes a sludge lifting device (5) disposed in the sedimentation device (2) and used for discharging sludge in the sedimentation device (2) into the sludge storage tank (1); A mud inlet pipe (6) is arranged above the mud storage tank (1), and the mud inlet pipe (6) is higher than the liquid level of the liquid inlet of the sedimentation device (2); The overflow pipe (4) is higher than the liquid level of the liquid inlet of the sedimentation device (2), and the overflow pipe (4) is lower than the liquid level of the mud inlet pipe (6); The mud lifting device (5) comprises a suction pipe and a fan connected to the suction pipe, one end of the suction pipe extends to the bottom of the sedimentation device (2), and the other end of the suction pipe is connected to the mud storage tank (1) through the fan; The aeration device is installed at the bottom of the mud storage tank (1) via a fixing frame, and the other end of the aeration device (3) is connected to the fan via a connecting pipe.

2. The sludge storage tank according to claim 1, characterized in that: The aeration device (3) is an air supply pipe with air holes.

3. The sludge storage tank according to claim 1, characterized in that: A filter screen is provided at the discharge port of the overflow pipe (4).

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