A sewage regulating tank facilitating quality-based and hierarchical regulation

Abstract

The present invention discloses a sewage regulating tank that is convenient for medium-separated and level-graded regulation. Its structure includes: a medium-separated and level-graded regulating tank, which is composed of at least two independent regulating sub-tanks connected in sequence, and the regulating sub-tanks are connected through a communicating pipe provided with an automatic control gate valve; a digital flowmeter is provided on the front-end water inlet pipe of the first regulating sub-tank at the very front end, and a water quality and liquid level monitoring device is provided at the rear end inside the first regulating sub-tank; electric stirrers are provided in each regulating sub-tank; submersible pumps are provided at the bottom of each regulating sub-tank, and each submersible pump is connected to the total water outlet pipe through a water outlet branch pipe; the digital flowmeter, the water quality and liquid level monitoring device, each electric stirrer, the automatic control gate valve, and each submersible pump are all electrically connected to a control device. This sewage regulating tank can conveniently achieve medium-separated and level-graded regulation of sewage according to the water volume, water quality, and liquid level height, reduce the ineffective consumption of the front-end carbon source, and provide guarantee for the main sewage treatment system at the rear end.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and particularly to a sewage regulating tank for front-end sewage treatment, which is convenient for regulating by water quality and level grading. Background Art

[0002] Whether it is urban sewage or industrial wastewater, its water quality and quantity will fluctuate greatly over time. The uneven influent flow rate and concentration will impact the subsequent sewage treatment system, causing the sewage treatment system to fail to operate under the optimal process conditions, and even leading to system paralysis. In order to improve the shock load resistance of the sewage treatment system, a sewage regulating tank, which is a front-end facility of the sewage treatment system with large fluctuations in water quality and quantity, is usually used to regulate the water quantity and quality of the influent and effluent. In actual sewage treatment systems, especially in rural sewage treatment systems and industrial wastewater treatment systems with large fluctuations in water quality and quantity, the regulating tank is usually designed to be relatively large. For example, in the "Code for Design of Building Water Supply and Drainage" (GB50015-2019), it is stipulated that for the regulating tank of domestic sewage, its volume shall not be greater than the average hourly flow rate of domestic sewage in 6 hours. On the one hand, it can ensure that the regulating tank has a certain regulating volume, and on the other hand, it can also prevent the regulating tank from being too large, which may cause sewage to decay and emit odors. However, in actual projects, due to problems such as the combined sewer system of rainwater and sewage, and the misconnection and wrong connection of pipe networks, the regulating tank with a 6-hour residence time usually cannot meet the actual needs. Therefore, the regulating tank is usually designed with a residence time of 12 hours or even longer to avoid the impact of instantaneous large flow rates and sudden pollution events during the rainy season. Although this has played a good role in shock resistance, during the daily operation process, due to the excessive volume of the regulating tank, the sewage cannot enter the main biochemical process section in time, resulting in problems such as anaerobic digestion of sewage in the regulating tank, consumption of more carbon sources, sludge deposition, and odor emission in the regulating tank. Furthermore, it leads to a low influent COD in the subsequent process section, affecting the denitrification effect, etc. Therefore, the setting of the regulating tank should not only meet the regulating function of large flow rates and high-concentration sewage under emergency situations to balance the water quantity and quality, but also avoid the ineffective consumption of carbon sources in the tank and reduce sludge deposition during the daily operation process. This poses relatively high requirements for the reasonable design of the regulating tank volume.

[0003] Regarding the research on the regulating tank, currently, many scholars are more concerned with aspects such as sludge deposition in the regulating tank, odor treatment of the regulating tank, or the construction and anti-seepage of the regulating tank. For example, He Kaiqiang studied the odor treatment technology of wastewater regulating tanks, and Sun Shuanhu et al. studied the anti-seepage of the regulating tank and the treatment measures for cracks in the tank wall and bottom plate. There is relatively little research on the configuration optimization of the regulating tank. Luo Huiyun et al. studied and designed a non-powered regulating tank, which can adjust the tank volume by reasonably designing the influent water distribution holes and effluent overflow weirs of the regulating tank, and can regulate a certain amount of water quality and quantity.

[0004] However, the existing sewage regulating ponds that can regulate a certain amount of water quality and quantity use micro-power (such as gravity flow or setting baffle overflows, etc.) for regulation, and their balancing effect on water quantity and quality is limited. They cannot regulate the incoming water with large fluctuations in water quantity and quality.

[0005] In view of this, the present invention is specifically proposed. Summary of the Invention

[0006] The object of the present invention is to provide a sewage regulating pond that is convenient for regulating by quality and level, which can reduce the ineffective consumption of the front-end carbon source while realizing the hierarchical and quality-based regulation of wastewater, and provide guarantee for the main sewage treatment system at the back end, thereby solving the above-mentioned technical problems existing in the prior art.

[0007] The object of the present invention is achieved by the following technical solutions:

[0008] An embodiment of the present invention provides a sewage regulating pond that is convenient for regulating by quality and level, including:

[0009] A quality-based and level-based regulating pond, which is composed of at least two separate regulating sub-ponds connected in sequence, and the connection pipes between the regulating sub-ponds are connected through self-control gate valves;

[0010] A digital flowmeter is provided on the front-end water inlet pipe of the first regulating sub-pond at the forefront, and a water quality monitoring sensor and a liquid level monitoring sensor are provided at the rear end inside the first regulating sub-pond;

[0011] An electric stirrer is provided in each regulating sub-pond;

[0012] A submersible pump is provided at the bottom of each regulating sub-pond, and each submersible pump is connected to the total water outlet pipe through a water outlet branch pipe;

[0013] The digital flowmeter, the water quality and liquid level monitoring device, each electric stirrer, the self-control gate valve and each submersible pump are all electrically connected to the control device.

[0014] Compared with the prior art, the sewage regulating pond that is convenient for regulating by quality and level provided by the present invention has the following beneficial effects:

[0015] By using at least two separate regulating sub-ponds connected in sequence as the quality-based and level-based regulating pond, controlling the connection pipes between the regulating sub-ponds through self-control gate valves, and cooperating with the digital flowmeter provided on the front-end water inlet pipe of the first regulating sub-pond, the water quality monitoring sensor and the liquid level monitoring sensor provided inside the rear end, the control device regulates the self-control gate valve, the electric stirrer and the submersible pump in each regulating sub-pond according to the monitored water inflow, water quality and liquid level in a preset corresponding manner, realizes the quality-based and level-based regulation of sewage, avoids the ineffective consumption of carbon source in the regulating pond, provides guarantee for the main sewage treatment system at the back end, and realizes energy conservation, carbon reduction and emission reduction. Brief Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic diagram of the composition of a sewage regulation tank facilitating quality-based and grade-based regulation provided by an embodiment of the present invention;

[0018] The main components in the accompanying drawings are: 1 - inlet pipe of the regulation tank; 2 - quality-based and grade-based regulation tank; 21 - first regulation sub-tank; 22 - second regulation sub-tank; 3 - electric stirrer; 31 - first stirrer; 32 - second stirrer; 4 - submersible sewage pump; 41 - first submersible sewage pump; 4.2 - second submersible sewage pump; 5 - digital flowmeter; 6 - water quality and liquid level monitoring device; 7 - automatic control gate valve; 8 - control device; 9 - overflow pipe; 10 - main sewage outlet pipe; 11 - maintenance manhole; 12 - remote monitoring system; 13 - connecting pipeline. Specific embodiments

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the specific content of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments, which do not constitute a limitation to the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0020] First, the terms that may be used in this article are described as follows:

[0021] The term "and / or" means that either one or both of the two can be realized. For example, X and / or Y means that it includes both the cases of "X" or "Y" and the three cases of "X and Y".

[0022] Descriptions with semantic meanings such as "include", "comprise", "contain", "have" or other similar terms should be interpreted as non-exclusive inclusion. For example: including a certain technical feature element (such as raw material, component, ingredient, carrier, dosage form, material, size, part, component, mechanism, device, step, process, method, reaction condition, processing condition, parameter, algorithm, signal, data, product or article, etc.) should be interpreted as not only including the clearly listed certain technical feature element, but also including other well-known technical feature elements in the art that are not clearly listed.

[0023] The term "consisting of" excludes any technical feature elements not expressly listed. If this term is used in a claim, it makes the claim closed, excluding technical feature elements other than those expressly listed, except for conventional impurities associated therewith. If this term only appears in a sub-clause of a claim, it only limits the elements expressly listed in that sub-clause, and the elements recited in other sub-clauses are not excluded from the overall claim.

[0024] Unless otherwise expressly specified or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0025] When concentrations, temperatures, pressures, dimensions or other parameters are expressed in the form of numerical ranges, the numerical ranges should be understood as specifically disclosing all ranges formed by the pairing of any upper limit values, lower limit values, and preferred values within the numerical ranges, regardless of whether they are expressly recited. For example, if the numerical range "2 - 8" is recited, then this numerical range should be interpreted as including ranges such as "2 - 7", "2 - 6", "5 - 7", "3 - 4 and 6 - 7", "3 - 5 and 7", "2 and 5 - 7", etc. Unless otherwise specified, the numerical ranges recited in this article include both their end values and all integers and fractions within the numerical ranges.

[0026] The orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplification of description, rather than expressly or implicitly indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to this article.

[0027] The sewage regulating tank that is convenient for separate quality and hierarchical regulation provided by the present invention will be described in detail below. The content not described in detail in the embodiments of the present invention belongs to the prior art well-known to those of ordinary skill in the art. For those conditions not specified in the embodiments of the present invention, they are carried out according to the conventional conditions in the art or the conditions recommended by the manufacturer. For the reagents or instruments not indicating the manufacturer in the embodiments of the present invention, they are all conventional products that can be obtained through commercial purchase.

[0028] AsFigure 1 As shown in Figure 1 , an embodiment of the present invention provides a sewage regulating tank that facilitates quality - based and stage - based regulation, including:

[0029] A quality - based and stage - based regulating tank, which is composed of at least two separate regulating sub - tanks connected in sequence. The communicating pipes provided with automatic control valves are connected between the regulating sub - tanks; preferably, the separate regulating sub - tanks can be multiple sub - tank bodies separated by partition walls within the same main tank body, or multiple independently arranged sub - tank bodies.

[0030] A digital flowmeter is provided on the front - end inlet pipe of the first regulating sub - tank at the very front. A water quality monitoring sensor and a liquid level monitoring sensor are arranged at the rear end inside the first regulating sub - tank; preferably, after being connected to an automatic control device, such a digital flowmeter can realize real - time online control and read out the measured flow value;

[0031] An electric stirrer is arranged in each regulating sub - tank;

[0032] A submersible sewage pump is arranged at the bottom of each regulating sub - tank. Each submersible sewage pump is connected to a total outlet pipe through an outlet sub - pipe;

[0033] The digital flowmeter, the water quality and liquid level monitoring device, each electric stirrer, the automatic control valve, and each submersible sewage pump are all electrically connected to a control device. The control device can control each electric stirrer, the automatic control valve, and each submersible sewage pump according to the flow value measured by the digital flowmeter and the monitoring values of the water quality and liquid level monitoring device, and realize quality - based and stage - based regulation of sewage.

[0034] In the above - mentioned sewage regulating tank, the communicating pipe is arranged at the lower part between two adjacent regulating sub - tanks;

[0035] An overflow pipe is connected between the upper parts of two adjacent regulating sub - tanks.

[0036] In the above - mentioned sewage regulating tank, the control device can control the opening or closing of the automatic control valve according to the water inflow volume of the first regulating sub - tank at the very front monitored by the digital flowmeter, and regulate the capacity of the quality - based and stage - based regulating tank. In this way, the overall expansion and reduction of the regulating tank can be realized, and further the regulation of the water quality and quantity of sewage can be achieved.

[0037] In the above sewage regulating tank, the control device can control the electric stirrers in each regulating sub-tank to stir according to the water inflow of the first regulating sub-tank at the forefront monitored by the digital flowmeter, and the water quality indicators and liquid level height in the first regulating sub-tank at the forefront monitored by the water quality monitoring sensor and the liquid level monitoring sensor. Monitoring the water quality indicators and liquid level height realizes the monitoring of the water quality and quantity in the regulating sub-tank, and further realizes the real-time monitoring of water quality indicators such as temperature, pH, dissolved oxygen, SS, COD, NH3-N, etc. that reflect the characteristics of the reaction sewage, and can also realize the real-time monitoring of the overall liquid level of the regulating tank. The electric stirrers are coordinated and feedback with the water quality and quantity monitoring to realize the mixing and stirring of the regulating tank.

[0038] In the above sewage regulating tank, the control device can control the submersible sewage pumps in each regulating sub-tank to operate alternately according to the water inflow of the first regulating sub-tank at the forefront monitored by the digital flowmeter, and the water quality indicators and liquid level height in the first regulating sub-tank at the forefront monitored by the water quality monitoring sensor and the liquid level monitoring sensor. The submersible sewage pumps are coordinated and feedback with the digital flowmeter and the water quality and quantity monitoring system to realize the alternate operation of two or more regulating tanks.

[0039] In the above sewage regulating tank, a maintenance manhole is provided at the top of each regulating sub-tank. It is convenient for the maintenance of each regulating sub-tank.

[0040] The above sewage regulating tank further includes: a remote monitoring system, which is communicatively connected to the control device through a wireless network and can perform remote monitoring and control.

[0041] In summary, the sewage regulating tank for facilitating separate quality and hierarchical regulation in the embodiment of the present invention uses at least two independent regulating sub-tanks connected in sequence as the separate quality and hierarchical regulation tanks, controls the connecting pipelines between the regulating sub-tanks through automatic control gate valves, and cooperates with the digital flowmeter arranged at the front end of the inlet pipe of the first regulating sub-tank, the water quality monitoring sensor and the liquid level monitoring sensor arranged inside the rear end. The control device regulates the automatic control gate valves, the electric stirrers and the submersible sewage pumps in each regulating sub-tank according to the monitored water inflow, water quality and liquid level, realizes the separate quality and hierarchical regulation of sewage, avoids the ineffective consumption of carbon sources in the regulating tank, provides guarantee for the subsequent main sewage treatment system, and realizes energy conservation, carbon reduction and emission reduction.

[0042] In order to more clearly show the technical solutions provided by the present invention and the technical effects produced, the following uses specific embodiments to describe in detail the sewage regulating tank for facilitating separate quality and hierarchical regulation provided by the embodiment of the present invention.

[0043] Embodiment

[0044] As Figure 1As shown in the figure, the embodiment of the present invention provides a sewage regulating tank that is convenient for quality-separated and hierarchical regulation, which can achieve intelligent and automated water quality and quantity balance regulation according to the water quantity and quality conditions of the incoming water, reduce the ineffective consumption of the front-end carbon source, increase the influent COD of the subsequent biochemical process, and achieve energy conservation, carbon reduction and emission reduction.

[0045] The sewage regulating tank includes: a water inlet pipe 1, a quality-separated and hierarchical regulating tank 2, an electric stirrer 3, a submersible pump 4, a digital flowmeter 5, a water quality and liquid level monitoring device 6, an automatic control gate valve 7, a connecting pipe 11, a control device 8, an overflow pipe 9 and a sewage outlet main pipe 10; among them,

[0046] The quality-separated and hierarchical regulating tank 2 is composed of at least two independent regulating sub-tanks connected in sequence. The quality-separated and hierarchical regulating tank 2 in this embodiment is composed of a first regulating sub-tank 21 and a second regulating sub-tank 22. The two regulating sub-tanks are arranged in a total tank body, and a retaining wall is provided between them for physical separation. The first regulating sub-tank 21 and the second regulating sub-tank 22 are connected through a connecting pipe arranged at the lower part of the retaining wall. An automatic control gate valve 7 is arranged on the connecting pipe 11, and this automatic control gate valve 7 is electrically connected to the control device 8, and can be automatically opened or closed under the control of the control device 8 to realize the opening and closing control of the connecting pipe 11;

[0047] Each of the first regulating sub-tank 21 and the second regulating sub-tank 22 is provided with a submersible pump. The first submersible pump 41 is arranged in the first regulating sub-tank 21, and the second submersible pump 42 is arranged in the second regulating sub-tank 22. Both the first submersible pump 41 and the second submersible pump 42 are connected to the sewage outlet main pipe through the water outlet branch pipes to realize the sewage outlet of each regulating sub-tank. Both the first submersible pump 41 and the second submersible pump 42 are electrically connected to the control device 8.

[0048] The water inlet pipe 1 is connected to the front end of the first regulating tank 21. A digital flowmeter 5 is arranged on the water inlet pipe 1, and this digital flowmeter 5 is electrically connected to the control device 8, and can monitor and measure the incoming water flow in real time. When the incoming water flow is normal or the water quality index is normal, the automatic control gate valve 71 is in the closed state, and the first submersible pump 41 pumps the sewage into the sewage outlet main pipe 10 and enters the subsequent sewage treatment system for treatment.

[0049] A water quality and liquid level monitoring device 6 is arranged at the rear end in the first regulating sub-pool 21. The water quality and liquid level monitoring device 6 is electrically connected to the control device 8. Preferably, the water quality and liquid level monitoring device 6 consists of a water quality and liquid level monitoring sensor and an intelligent control panel that are electrically connected to each other. If the water quality and liquid level monitoring sensor of the water quality and liquid level monitoring device 6 senses that the influent flow rate exceeds the average design flow rate or the water quality index exceeds a certain limit of the designed influent index, the data is fed back through the coordination of the control device 8 to control the automatic opening of the automatic control gate valve 7. The sewage enters the second regulating sub-pool through the connecting pipeline 11, and the overall regulating pool is expanded. The first submersible pump 41 and the second submersible pump 42 operate alternately through the control device 8 to achieve the balanced regulation of the water volume and water quality of the sewage.

[0050] An electric stirrer 3 is arranged in each regulating sub-pool. For example, the first electric stirrer 31 is arranged in the first regulating sub-pool 21, and the second electric stirrer 32 is arranged in the second regulating sub-pool 22. Each electric stirrer is electrically connected to the control device 8. Through the control device 8, intermittent stirring is carried out in each regulating sub-pool to prevent sludge deposition and balance the water quality. The operating conditions of the regulating pool can be automatically controlled through the control device 8. It can also be remotely monitored and controlled through the remote monitoring system 12 communicating with the control device 8 via a wireless network. Each regulating sub-pool is provided with a maintenance manhole 11, which is convenient for manual maintenance and repair.

[0051] The specific operation mode of the sewage regulating pool of the present invention is as follows:

[0052] 1) Normal operating conditions: When the influent flow rate is normal or the water quality index is normal, the control device controls the automatic control gate valve and the electric stirrer to be in the closed state through the data feedback of the digital flowmeter at the influent pipe and the water quality and liquid level monitoring device. The sewage is transported to the subsequent treatment system for treatment through the submersible pump, the effluent branch pipe and the sewage effluent main pipe. When the influent flow rate is normal and the water quality index exceeds the normal value, the first electric stirrer is turned on to stir and homogenize the sewage in the first regulating sub-pool.

[0053] 2) Sudden large water volume and high concentration conditions: When the influent flow rate exceeds the normal value and the liquid level of the first regulating sub-pool reaches the set safety height, and the water quality index is normal, the automatic control gate valve is automatically opened through the control device. The sewage enters the second regulating sub-pool through the connecting pipeline, playing a role in balancing the water volume. At this time, the first and second submersible pumps are turned on in an alternating operation mode; when both the influent flow rate and the water quality index exceed the normal value and the liquid level of the first regulating sub-pool reaches the set safety height, the automatic control gate valve is controlled to be automatically opened through the control device. The sewage enters the second regulating sub-pool through the connecting pipeline, playing a role in balancing the water volume. The first electric stirrer and the second electric stirrer are turned on for water quality balancing regulation, and the first and second submersible pumps are turned on in an alternating operation mode.

[0054] Through the design of the configuration of the sewage regulating tank of the present invention and in cooperation with the water volume and water quality control device, the hierarchical and quality-based regulation of wastewater is realized, and it has at least the following beneficial effects:

[0055] 1) It can realize the balanced regulation of the water volume and water quality of sewage, and ensure the stable operation of the main sewage treatment system at the back end.

[0056] 2) Since the automatic opening and closing of the automatic control valve can be realized according to the water volume and water quality conditions of the incoming water, the ineffective consumption of the front-end carbon source can be reduced, the influent COD of the biochemical process at the back end can be increased, and energy conservation, carbon reduction and emission reduction can be realized.

[0057] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims. The information disclosed in the background art part of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or an indication in any form that this information constitutes the prior art known to those skilled in the art.

Claims

1. A sewage regulating tank facilitating separate-quality and hierarchical regulation, characterized in that Including: A quality-separated and level-regulated pond, which consists of at least two separate regulated sub-ponds connected in sequence, and the regulated sub-ponds are connected by a communication pipeline provided with an automatic control gate valve; A digital flowmeter is provided on the front-end water inlet pipe of the first regulated sub-pond at the very front, and a water quality and liquid level monitoring device is provided at the rear end inside the first regulated sub-pond; An electric agitator is provided in each regulated sub-pond; A submersible sewage pump is provided at the bottom of each regulated sub-pond, and each submersible sewage pump is connected to the total water outlet pipe through a water outlet branch pipe; The digital flowmeter, the water quality and liquid level monitoring device, each electric agitator, the automatic control gate valve and each submersible sewage pump are all electrically connected to the control device; The control device can control the opening or closing of the automatic control gate valve according to the water inflow of the first regulated sub-pond at the very front monitored by the digital flowmeter, and regulate the capacity of the quality-separated and level-regulated pond; An inspection manhole is provided at the top of each regulated sub-pond; It also includes: a remote monitoring system, which is communicatively connected to the control device through a wireless network and can perform remote monitoring and control.

2. The sewage regulating tank facilitating quality-based and hierarchical regulation according to claim 1, wherein The communication pipeline is arranged at the lower part of two adjacent regulated sub-ponds; Two adjacent regulated sub-ponds are connected by an overflow pipeline at the upper part.

3. The sewage regulating tank facilitating medium and grade separation regulation according to claim 1 or 2, characterized in that The control device can control the opening and closing of the electric agitators in each regulated sub-pond according to the water inflow of the first regulated sub-pond at the very front monitored by the digital flowmeter, and the water quality index and liquid level height inside the first regulated sub-pond monitored by the water quality and liquid level monitoring device.

4. The sewage regulating tank facilitating separate quality and hierarchical regulation according to claim 1 or 2, characterized in that, The control device can control the alternating operation of the submersible sewage pumps in each regulated sub-pond according to the water inflow of the first regulated sub-pond at the very front monitored by the digital flowmeter, and the water quality index and liquid level height inside the first regulated sub-pond monitored by the water quality and liquid level monitoring device.

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