Multifunctional primary sedimentation tank

Abstract

The invention discloses a multifunctional primary sedimentation tank which comprises a water distribution channel, a water outlet channel, a crossing pipe for connecting the water distribution channel and the water outlet channel, and an overrunning gate, the plurality of primary sedimentation tanks are arranged between the water distribution channels; the water inlet pipe is arranged between the plurality of primary sedimentation tanks and the water distribution channel and controls water inlet through a water inlet gate; the sludge water inlet pipe is arranged between the plurality of primary sedimentation tanks and the sludge pipe, the sludge water inlet of the sludge water inlet pipe is controlled through a sludge discharge valve B and a sludge valve, and the sludge water outlet of the sludge water inlet pipe is controlled through a sludge inlet valve; the first water outlet pipe and the second water outlet pipe are respectively arranged between the plurality of primary sedimentation tanks and the water outlet channel and between the plurality of primary sedimentation tanks and the supernatant discharge pipe, and are respectively used for controlling water outlet through a first water outlet valve and a second water outlet valve; and the sludge discharge pipe is arranged between the plurality of primary sedimentation tanks and the sludge treatment system and controls the sludge flow through a sludge discharge valve A.

Description

Technical Field

[0001] The present invention relates to the field of environmental protection, in particular to a water treatment technology, in particular to a multifunctional primary sedimentation tank. Background Art

[0002] Primary sedimentation tanks are generally used as pretreatment structures for sewage treatment, mainly to reduce the concentration of suspended solids in sewage and simultaneously remove some organic matter. Therefore, the carbon source of the effluent from the primary sedimentation tank often cannot meet the needs of subsequent biological denitrification and phosphorus removal. However, the cancellation of the primary sedimentation tank will increase the aeration volume and energy consumption of the biological pool. Idle primary sedimentation tanks also cause waste of investment and land.

[0003] With the advancement of "carbon peak" and "carbon neutrality" policies, wastewater treatment systems also require technical measures to save energy and reduce consumption. The question of how to fully utilize the capacity of traditional primary sedimentation tanks through renovation, while simultaneously achieving multiple functions such as high load, spanning, sludge hydrolysis, and sludge concentration, thereby reducing operating costs, saving energy and reducing consumption, and avoiding wasteful land use is of great practical significance in this field. Summary of the Invention

[0004] The present invention aims to provide a multifunctional primary sedimentation tank, which can effectively solve the problems existing in the prior art.

[0005] According to one aspect of the present invention, a multifunctional primary sedimentation tank is provided, characterized in that it includes: a water distribution channel, a water outlet channel, a crossing pipe connecting the water distribution channel and the water outlet channel, and an overrunning gate; several primary sedimentation tanks, arranged between the water distribution channel and the water outlet channel; an inlet pipe, arranged between the several primary sedimentation tanks and the water distribution channel, and controlling the water inlet by the inlet gate; a sludge inlet pipe, arranged between the several primary sedimentation tanks and the sludge pipe, controlling the sludge inlet of the sludge inlet pipe by the sludge discharge valve B and the sludge valve, and controlling the sludge outflow of the sludge inlet pipe by the sludge inlet valve; a first outlet pipe arranged between the several primary sedimentation tanks and the water outlet channel, controlling the water outlet by the outlet valve A; a second outlet pipe arranged between the several primary sedimentation tanks and the supernatant discharge pipe, controlling the water outlet by the outlet valve B; a sludge discharge pipe, arranged between the several primary sedimentation tanks and the sludge treatment system, and switching the mode by the sludge discharge valve A.

[0006] Preferably, the plurality of primary sedimentation tanks include a first primary sedimentation tank, a second primary sedimentation tank, a third primary sedimentation tank, and a fourth primary sedimentation tank. The water inlet gate includes a first water inlet gate, a second water inlet gate, a third water inlet gate, and a fourth water inlet gate. The sludge inlet valve includes a first sludge inlet valve, a second sludge inlet valve, a third sludge inlet valve, and a fourth sludge inlet valve. The sludge discharge valve A includes a first sludge discharge valve A, a second sludge discharge valve A, a third sludge discharge valve A, and a fourth sludge discharge valve A. The sludge discharge valve B includes a first sludge discharge valve B, a second sludge discharge valve B, a third sludge discharge valve B, and a fourth sludge discharge valve B; the water outlet valve A includes a first water outlet valve A, a second water outlet valve A, a third water outlet valve A, and a fourth water outlet valve A; the water outlet valve B includes a first water outlet valve B, a second water outlet valve B, a third water outlet valve B, and a fourth water outlet valve B. The sludge valve includes a first sludge valve and a second sludge valve, the first sludge valve is connected to the residual sludge pipe, and the second sludge valve is connected to other sludge pipes.

[0007] According to another aspect of the present invention, a method for treating sewage using the above-mentioned primary sedimentation tank is provided, which includes opening the first water inlet gate, the second water inlet gate, the third water inlet gate, and the fourth water inlet gate, and closing the first mud inlet valve, the second mud inlet valve, the third mud inlet valve, the fourth mud inlet valve, the override gate, and the first sludge valve and the second sludge valve, so that all the sewage enters the first primary sedimentation tank, the second primary sedimentation tank, the third primary sedimentation tank, and the fourth primary sedimentation tank for treatment; opening the first mud discharge valve A, the second mud discharge valve A, the third mud discharge valve A, and the fourth mud discharge valve A, and closing the first mud discharge valve B, the second mud discharge valve B, the third mud discharge valve B, and the fourth mud discharge valve B, and connecting the discharged mud to the sludge treatment system; opening the first water outlet valve A, the second water outlet valve A, the third water outlet valve A, and the fourth water outlet valve A, and closing the first water outlet valve B, the second water outlet valve B, the third water outlet valve B, and the fourth water outlet valve B, and directly discharging the discharged water into a subsequent treatment process.

[0008] According to another aspect of the present invention, a method for treating sewage using the above-mentioned primary sedimentation tank is provided, wherein the first water inlet gate, the second water inlet gate, and the third water inlet gate are opened, and the fourth water inlet gate and the overtaking gate are closed, so that all the sewage enters the first primary sedimentation tank, the second primary sedimentation tank, and the third primary sedimentation tank for treatment; the first mud discharge valve B, the second mud discharge valve B, and the third mud discharge valve B are opened, and the first mud discharge valve A, the second mud discharge valve A, and the third mud discharge valve A are closed, and the mud is connected to the sludge water inlet pipe; the fourth mud inlet valve is opened, and the first mud inlet valve, the second mud inlet valve, and the third mud inlet valve are closed. The mud valve and the first sludge valve and the second sludge valve, the sludge inlet pipe is connected to the fourth primary sedimentation tank; the fourth mud discharge valve A is opened, the fourth mud discharge valve B is closed, and the sludge is connected to the sludge treatment system; it is determined whether the supernatant of the fourth primary sedimentation tank is connected to the designated carbon source addition point. If so, the fourth outlet valve B is opened, the fourth outlet valve A is closed, and the supernatant pump is started to send the supernatant to the designated carbon source addition point; otherwise, the fourth outlet valve A is opened, the fourth outlet valve B is closed, and the supernatant is directly connected to the outlet channel, and is discharged into the subsequent treatment process together with the outlet water of the first primary sedimentation tank, the second primary sedimentation tank, and the third primary sedimentation tank.

[0009] According to another aspect of the present invention, a method for treating sewage using the above-mentioned primary sedimentation tank is provided, wherein the first water inlet gate, the second water inlet gate, and the third water inlet gate are opened, and the fourth water inlet gate and the overtaking gate are closed, so that all the sewage enters the first primary sedimentation tank, the second primary sedimentation tank, and the third primary sedimentation tank for treatment; the first mud discharge valve B, the second mud discharge valve B, and the third mud discharge valve B are opened, the first mud discharge valve A, the second mud discharge valve A, and the third mud discharge valve A are closed, and the first sludge valve and the second sludge valve are opened, so that the primary sludge, other sludge, and residual sludge are connected to the sludge water inlet pipe; the fourth mud inlet valve is opened, and the first mud discharge valve is closed. The first mud inlet valve, the second mud inlet valve, and the third mud inlet valve enable the sludge inlet pipe to be connected to the fourth primary sedimentation tank; the fourth mud discharge valve A is opened, the fourth mud discharge valve B is closed, and the discharged mud is connected to the sludge treatment system; it is determined whether the supernatant of the fourth primary sedimentation tank is connected to the designated carbon source addition point. If so, the fourth outlet valve B is opened, the fourth outlet valve A is closed, and the supernatant pump is started to send the supernatant to the designated carbon source addition point; otherwise, the fourth outlet valve A is opened, the fourth outlet valve B is closed, and the supernatant is directly connected to the outlet channel, and is discharged into the subsequent treatment process together with the outlet water of the first primary sedimentation tank, the second primary sedimentation tank, and the third primary sedimentation tank.

[0010] According to the technical solution provided by the present invention, a multifunctional primary sedimentation tank is provided. By modifying the traditional primary sedimentation tank and setting up pipelines, valves, instruments, and electronic control systems, the volume of the primary sedimentation tank can be fully utilized, and multiple functions such as high load, spanning, sludge hydrolysis, and sludge concentration can be simultaneously achieved, thereby reducing operating costs, saving energy and reducing consumption, and avoiding waste of land.

[0011] The present invention is a transformation based on a traditional primary sedimentation tank, with a simple overall system and low investment and operating costs. It can retain all the functions of the original primary sedimentation tank and can partially or completely bypass the primary sedimentation tank. The operating mode of the idle primary sedimentation tank can be changed to sludge hydrolysis, sludge concentration and other modes according to water quality conditions. The hydrolysis and acidification mode can make full use of the carbon source in the primary sludge, reduce the addition of external new carbon sources, save operating costs, and reduce carbon emissions. The sludge concentration mode can further reduce the water content of various types of sludge in the entire plant, reduce the amount of chemicals added to the sludge treatment system, reduce operating costs, and reduce carbon emissions. A supernatant discharge system can be set to send the supernatant containing a large amount of VFA or phosphate after hydrolysis and concentration to a carbon source addition point or a phosphorus removal system. Equipped with electronically controlled equipment such as electronically controlled gates, water pumps, flow meters and sludge concentration meters, the system can achieve precise metering and fully automatic operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0013] Explanation of the figure markings: For ease of description and understanding, in the figures of this specification, for systems or devices with multiple similar components (such as multiple mud discharge valves), they are marked in the form of "basic identifier + superscript number" (for example, "mud discharge valve B1", "mud discharge valve B2", "mud discharge valve B3"). The superscript numbers "1", "2", "3", etc. here correspond to the ordinal numbers such as "first", "second", and "third" described in the main text of the specification and the claims. For example, the "mud discharge valve A1" in the figure refers to the "first mud discharge valve A" in the main text of the specification and the claims, and the "mud discharge valve A2" refers to the "second mud discharge valve A", and so on. Those skilled in the art should understand that such superscript numbers are only used to indicate the order and the correspondence with the main text of the specification, and do not imply any special limitations on structure, function or position, unless otherwise expressly stated.

[0014] Figure 1 is a schematic diagram of a system layout according to an embodiment of the present invention;

[0015] Figure 2 This is a logic diagram of the operating conditions of a traditional primary sedimentation tank provided according to an embodiment of the present invention;

[0016] Figure 3 This is a logic diagram of the operating conditions of the sludge hydrolysis mode provided in an embodiment of the present invention;

[0017] Figure 4 This is a logic diagram of the operating conditions of the sludge concentration mode provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] system

[0020] like Figure 1 The present invention is shown to provide a multifunctional primary sedimentation tank, which includes a water inlet system, a mud inlet system, a primary sedimentation tank, a water outlet system, a mud discharge system, a spanning system and a supernatant discharge system.

[0021] The water inlet system includes the main inlet pipe, distribution channels, inlet gates 1, 2, 3, and 4, and supporting piping. It is responsible for connecting upstream sewage to each primary sedimentation tank. The sludge inlet system includes sludge valve 1, sludge flowmeter 1, and sludge concentration meter 1 for residual sludge, and sludge valve 2, sludge flowmeter 2, and sludge concentration meter 2 for other sludge, as well as supporting piping. It is responsible for connecting the various sludge pipes within the plant area and connecting them to each primary sedimentation tank. There are four primary sedimentation tanks, which are similar to traditional primary sedimentation tanks and include scrapers, mud and slag discharge equipment, and other equipment. The outlet system includes the outlet pipes, outlet channels, and the main outlet pipeline for each primary sedimentation tank. It is responsible for collecting and aggregating the effluent from each primary sedimentation tank and discharging it to the downstream treatment system. The sludge discharge system, including the sludge discharge pipes, sludge pumps 1-4, sludge valves A1-4 and B1-4, sludge flowmeters 1-4, and supporting piping for each primary sedimentation tank, is responsible for connecting the primary sludge to the sludge inlet pipe or sludge treatment system. The crossing system, equipped with a crossing gate, crossing flowmeter, and crossing pipe in the water distribution channel, includes the supernatant discharge pipes, supernatant pumps 1-4, and supernatant flowmeters 1-4. Outlet valves A1-4 and B1-4 are installed on the outlet pipes of each primary sedimentation tank, allowing the effluent to be connected to the outlet channel or supernatant discharge pipe.

[0022] like Figure 1As shown, this embodiment provides a multifunctional primary sedimentation tank, including: a water distribution channel, a water outlet channel, a crossing pipe connecting the water distribution channel and the water outlet channel, and a bypass gate; several primary sedimentation tanks, arranged between the water distribution channel and the water outlet channel; an inlet pipe, arranged between the several primary sedimentation tanks and the water distribution channel, and controlling the water inlet through the inlet gate; a sludge inlet pipe, arranged between the several primary sedimentation tanks and the sludge pipe, controlling the sludge inlet of the sludge inlet pipe through the sludge discharge valve B and the sludge valve, and controlling the sludge outflow of the sludge inlet pipe through the sludge inlet valve; a first outlet pipe arranged between the several primary sedimentation tanks and the water outlet channel, controlling the water outlet through the outlet valve A; a second outlet pipe arranged between the several primary sedimentation tanks and the supernatant discharge pipe, controlling the water outlet through the outlet valve B; a sludge discharge pipe, arranged between the several primary sedimentation tanks and the sludge treatment system, regulating the flow through the sludge discharge pump and the flow meter, and switching to other primary sedimentation tanks or sludge systems through the sludge discharge valves A and B. The primary sedimentation tanks include the first primary sedimentation tank, the second primary sedimentation tank, the third primary sedimentation tank, and the fourth primary sedimentation tank. The water inlet gates include the first water inlet gate, the second water inlet gate, the third water inlet gate, and the fourth water inlet gate. The sludge inlet valves include the first sludge inlet valve, the second sludge inlet valve, the third sludge inlet valve, and the fourth sludge inlet valve. The sludge discharge valves A include the first sludge discharge valve A, the second sludge discharge valve A, the third sludge discharge valve A, and the fourth sludge discharge valve A. The sludge discharge valves B include the first sludge discharge valve B, the second sludge discharge valve B, the third sludge discharge valve B, and the fourth sludge discharge valve B. The water outlet valves A include the first water outlet valve A, the second water outlet valve A, the third water outlet valve A, and the fourth water outlet valve A. The water outlet valves B include the first water outlet valve B, the second water outlet valve B, the third water outlet valve B, and the fourth water outlet valve B. The sludge valves include the first sludge valve and the second sludge valve. The first sludge valve is connected to the residual sludge pipe, and the second sludge valve is connected to other sludge pipes.

[0023] In the above embodiments, the first mud discharge valve A is shown as mud discharge valve A1, the third mud discharge valve A is shown as mud discharge valve A3, and the same applies to other examples.

[0024] Working conditions

[0025] Working condition 1: See Figure 2 , traditional primary sedimentation tank operation mode.

[0026] Open: water inlet gates 1, 2, 3, 4, water outlet valves A1, A2, A3, A4, mud discharge valves A1, A2, A3, A4.

[0027] Close: mud inlet valves 1, 2, 3, 4, overrun gate, sludge valves 1, 2, outlet valves B1, B2, B3, B4, mud discharge valves B1, B2, B3, B4.

[0028] All wastewater is treated in four primary sedimentation tanks, with the effluent directly discharged into subsequent treatment processes and the primary sludge directly discharged into the sludge treatment system. Traditional primary sedimentation tank systems also feature crossover pipes, which can be partially or fully crossed depending on the specific situation.

[0029] like Figure 2 As shown, according to another embodiment of the present invention, a method for treating sewage using the above-mentioned primary sedimentation tank is provided, including: opening the first water inlet gate, the second water inlet gate, the third water inlet gate, and the fourth water inlet gate, closing the first mud inlet valve, the second mud inlet valve, the third mud inlet valve, the fourth mud inlet valve, the override gate and the first sludge valve and the second sludge valve, and allowing all sewage to enter the first primary sedimentation tank, the second primary sedimentation tank, the third primary sedimentation tank, and the fourth primary sedimentation tank for treatment; opening the first mud discharge valve A, the second mud discharge valve A, the third mud discharge valve A, and the fourth mud discharge valve A, and closing the first mud discharge valve B, the second mud discharge valve B, the third mud discharge valve B, and the fourth mud discharge valve B, and connecting the discharged mud to the sludge treatment system; opening the first water outlet valve A, the second water outlet valve A, the third water outlet valve A, and the fourth water outlet valve A, and closing the first water outlet valve B, the second water outlet valve B, the third water outlet valve B, and the fourth water outlet valve B, and discharging the discharged water directly into a subsequent treatment process. In the above embodiment, the fourth water outlet valve A is shown as the water outlet valve A4, the third water outlet valve B is shown as the water outlet valve B3, and the same applies to other examples.

[0030] Working condition 2: See Figure 3 , sludge hydrolysis mode.

[0031] When the carbon source of the sewage biological system is insufficient, the number of primary sedimentation tanks in operation can be reduced, the loss of organic matter in the original sewage can be reduced, and the idle primary sedimentation tanks can be converted into sludge hydrolysis tanks to fully utilize the carbon source in the primary sludge. There is no need for additional structures, the amount of purchased carbon sources can be saved, and operating costs can be reduced.

[0032] Open: water inlet gates 1, 2, 3, water outlet valves A1, A2, A3, mud discharge valves B1, B2, B3, A4, mud inlet valve 4;

[0033] Close: water inlet gate 4, overrun gate, mud inlet valves 1, 2, 3, sludge valves 1, 2, water outlet valves B1, B2, B3, mud discharge valves A1, A2, A3, B4.

[0034] Wastewater enters primary sedimentation tanks 1, 2, and 3 for treatment, with the effluent discharged directly into subsequent treatment processes. Primary sludge is then fed into primary sedimentation tank 4 via a sludge inlet pipe, which then functions as a sludge hydrolysis tank. The sludge from the hydrolysis tank is discharged directly into the sludge treatment system. The supernatant from the hydrolysis tank is rich in VFAs and can be discharged directly into subsequent treatment processes along with the primary sedimentation tank effluent, or pumped to a designated carbon source dosing point.

[0035] like Figure 3 As shown, according to another embodiment of the present invention, a method for treating sewage using the above-mentioned primary sedimentation tank is provided, comprising: opening the first water inlet gate, the second water inlet gate, and the third water inlet gate, closing the fourth water inlet gate and the overtaking gate, and allowing all sewage to enter the first primary sedimentation tank, the second primary sedimentation tank, and the third primary sedimentation tank for treatment; opening the first mud discharge valve B, the second mud discharge valve B, and the third mud discharge valve B, closing the first mud discharge valve A, the second mud discharge valve A, and the third mud discharge valve A, and connecting the discharged mud to the sludge water inlet pipe; opening the fourth mud discharge valve, closing the first mud discharge valve, the second mud discharge valve, and the third mud discharge valve A, and connecting the discharged mud to the sludge water inlet pipe. The third sludge inlet valve and the first sludge valve and the second sludge valve, the sludge inlet pipe is connected to the fourth primary sedimentation tank; the fourth sludge discharge valve A is opened, the fourth sludge discharge valve B is closed, and the sludge is connected to the sludge treatment system; it is determined whether the supernatant of the fourth primary sedimentation tank is connected to the designated carbon source addition point, if so, the fourth outlet valve B is opened, the fourth outlet valve A is closed, and the supernatant pump is opened to send the supernatant to the designated carbon source addition point; otherwise, the fourth outlet valve A is opened, the fourth outlet valve B is closed, and the supernatant is directly connected to the outlet channel, and is discharged into the subsequent treatment process together with the outlet water of the first primary sedimentation tank, the second primary sedimentation tank, and the third primary sedimentation tank. In the above embodiment, the fourth outlet valve B is shown as outlet valve B4 in the figure, and the first sludge valve is shown as sludge valve 1 in the figure, and the same applies to other examples.

[0036] Working condition 3: See Figure 4 , sludge concentration mode.

[0037] Sewage treatment systems often have high moisture content in various sludge types, including excess sludge, chemical sludge, and digested sludge. Consequently, large sludge volumes are generated, leading to large-scale sludge treatment and high operating costs. In these cases, idle primary sedimentation tanks can be converted to sludge concentration mode to fully utilize the effective volume, reduce sludge moisture content, minimize sludge volume, and save operating costs.

[0038] Open: water inlet gates 1, 2, 3, water outlet valves A1, A2, A3, A4, mud discharge valves B1, B2, B3, A4, sludge valves 1, 2, mud inlet valve 4;

[0039] Close: water inlet gate 4, overrun gate, mud inlet valves 1, 2, 3, water outlet valves B1, B2, B3, B4, mud discharge valves A1, A2, A3, B4.

[0040] Sewage enters primary sedimentation tanks 1, 2, and 3 for treatment, with the effluent discharged directly into subsequent treatment processes. Primary sludge, excess sludge, and other sludge are then fed into primary sedimentation tank 4 via a sludge inlet pipe. This primary sedimentation tank then functions as a sludge thickener. Sludge from the thickeners is discharged directly into the sludge treatment system, while the supernatant is discharged directly into subsequent treatment processes along with the primary sedimentation tank effluent. If the supernatant from the thickeners contains high levels of phosphates or other substances requiring treatment, it can be pumped to designated phosphorus removal or other treatment units as needed, with the opening and closing of outlet valves A4 and B4 adjusted accordingly.

[0041] like Figure 4 As shown, according to another embodiment of the present invention, a method for treating sewage using the above-mentioned primary sedimentation tank is provided, comprising: opening the first water inlet gate, the second water inlet gate, and the third water inlet gate, closing the fourth water inlet gate and the overtaking gate, and allowing all sewage to enter the first primary sedimentation tank, the second primary sedimentation tank, and the third primary sedimentation tank for treatment; opening the first mud discharge valve B, the second mud discharge valve B, and the third mud discharge valve B, closing the first mud discharge valve A, the second mud discharge valve A, and the third mud discharge valve A, opening the first sludge valve and the second sludge valve, so that primary sludge, other sludge, and residual sludge are connected to the sludge water inlet pipe; opening the fourth mud inlet valve, closing Close the first mud inlet valve, the second mud inlet valve, and the third mud inlet valve so that the sludge inlet pipe is connected to the fourth primary sedimentation tank; open the fourth mud discharge valve A, close the fourth mud discharge valve B, and connect the discharged mud to the sludge treatment system; determine whether the supernatant of the fourth primary sedimentation tank is connected to the designated carbon source addition point. If so, open the fourth outlet valve B, close the fourth outlet valve A, and start the supernatant pump to send the supernatant to the designated carbon source addition point; otherwise, open the fourth outlet valve A, close the fourth outlet valve B, and the supernatant is directly connected to the outlet channel, and is discharged into the subsequent treatment process together with the outlet water of the first primary sedimentation tank, the second primary sedimentation tank, and the third primary sedimentation tank. In the above embodiment, the fourth outlet valve B is shown as outlet valve B4 in the figure, and the first mud inlet valve is shown as mud inlet valve 1 in the figure, and the same applies to other examples.

[0042] work Case 4, other modes.

[0043] Based on the aforementioned basic operating modes, multiple combinations can be implemented based on the water plant's specific circumstances. The present invention utilizes a multifunctional primary sedimentation tank, combined with the ability to switch between different operating modes, to achieve efficient sludge treatment and resource utilization. Precise control of each system not only improves sludge treatment efficiency but also achieves energy conservation and emission reduction, reducing operating costs. The system's intelligent and automated management ensures efficient operation of the water treatment plant.

[0044] According to the technical solution described in the present invention, space-time dual-dimensional regulation can be achieved, the physical structure (valve group distribution) is combined with the real-time control algorithm, breaking through the traditional single control dimension, and realizing the synergistic efficiency of "spatial screening + timing optimization". Through the deep integration of structural innovation and control, the field of sewage treatment has achieved a leap from "extensive operation" to "precise energy efficiency management", which has significant technological advancement and engineering application value.

[0045] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A multifunctional primary sedimentation tank, characterized in that: include: A water distribution channel, a water outlet channel, a crossover pipe connecting the water distribution channel and the water outlet channel, and an overrunning gate; a plurality of primary sedimentation tanks, arranged between the water distribution channel and the water outlet channel; A water inlet pipe is provided between the primary settling tanks and the water distribution channel, and controls water inlet through a water inlet gate; A sludge inlet pipe is provided between the primary settling tanks and the sludge pipe, and the sludge inlet of the sludge inlet pipe is controlled by the sludge discharge valve B and the sludge valve, and the sludge outflow of the sludge inlet pipe is controlled by the sludge inlet valve; A first outlet pipe is provided between the plurality of primary settling tanks and the outlet channel, and the outlet is controlled by an outlet valve A; A second water outlet pipe is provided between the plurality of primary settling tanks and the supernatant discharge pipe, and the water outlet is controlled by a water outlet valve B; The sludge discharge pipe is arranged between the several primary sedimentation tanks and the sludge treatment system, and the mode is switched by the sludge discharge valve A.

2. The primary sedimentation tank according to claim 1, characterized in that Several primary sedimentation tanks include the first primary sedimentation tank, the second primary sedimentation tank, the third primary sedimentation tank, and the fourth primary sedimentation tank.

3. The primary sedimentation tank according to claim 2, characterized in that: The water inlet gates include a first water inlet gate, a second water inlet gate, a third water inlet gate, and a fourth water inlet gate.

4. The primary sedimentation tank according to claim 3, characterized in that The mud inlet valve includes a first mud inlet valve, a second mud inlet valve, a third mud inlet valve, and a fourth mud inlet valve.

5. The primary sedimentation tank according to claim 4, characterized in that: The mud discharge valve A includes a first mud discharge valve A, a second mud discharge valve A, a third mud discharge valve A, and a fourth mud discharge valve A.

6. The primary sedimentation tank according to claim 5, characterized in that: The mud discharge valve B includes a first mud discharge valve B, a second mud discharge valve B, a third mud discharge valve B, and a fourth mud discharge valve B.

7. The primary sedimentation tank according to claim 6, characterized in that: The water outlet valve A includes the first water outlet valve A, the second water outlet valve A, the third water outlet valve A, and the fourth water outlet valve A; the water outlet valve B includes the first water outlet valve B, the second water outlet valve B, the third water outlet valve B, and the fourth water outlet valve B. The sludge valve includes the first sludge valve and the second sludge valve. The first sludge valve is connected to the residual sludge pipe, and the second sludge valve is connected to other sludge pipes.

8. A method for treating sewage using the primary sedimentation tank according to claim 7, characterized in that: Open the first water inlet gate, the second water inlet gate, the third water inlet gate, and the fourth water inlet gate, and close the first sludge inlet valve, the second sludge inlet valve, the third sludge inlet valve, the fourth sludge inlet valve, the override gate, and the first sludge valve and the second sludge valve, so that all sewage enters the first primary sedimentation tank, the second primary sedimentation tank, the third primary sedimentation tank, and the fourth primary sedimentation tank for treatment; Open the first mud discharge valve A, the second mud discharge valve A, the third mud discharge valve A, and the fourth mud discharge valve A, and close the first mud discharge valve B, the second mud discharge valve B, the third mud discharge valve B, and the fourth mud discharge valve B, and connect the discharged mud to the sludge treatment system; Open the first water outlet valve A, the second water outlet valve A, the third water outlet valve A, and the fourth water outlet valve A, and close the first water outlet valve B, the second water outlet valve B, the third water outlet valve B, and the fourth water outlet valve B, and discharge the outlet water directly into the subsequent treatment process.

9. A method for treating sewage using the primary sedimentation tank according to claim 7, characterized in that: Open the first water inlet gate, the second water inlet gate, and the third water inlet gate, close the fourth water inlet gate and the overrun gate, and allow all sewage to enter the first primary sedimentation tank, the second primary sedimentation tank, and the third primary sedimentation tank for treatment; Open the first mud discharge valve B, the second mud discharge valve B, and the third mud discharge valve B, close the first mud discharge valve A, the second mud discharge valve A, and the third mud discharge valve A, and connect the mud discharge to the sludge water inlet pipe; Open the fourth mud inlet valve, close the first mud inlet valve, the second mud inlet valve, the third mud inlet valve, the first sludge valve, and the second sludge valve, and connect the sludge inlet pipe to the fourth primary settling tank; Open the fourth mud discharge valve A, close the fourth mud discharge valve B, and connect the discharged mud to the sludge treatment system; Determine whether the supernatant of the fourth primary sedimentation tank is connected to the designated carbon source addition point. If so, open the fourth outlet valve B, close the fourth outlet valve A, and start the supernatant pump to send the supernatant to the designated carbon source addition point; otherwise, open the fourth outlet valve A, close the fourth outlet valve B, and directly connect the supernatant to the outlet channel to merge with the outlet water of the first primary sedimentation tank, the second primary sedimentation tank, and the third primary sedimentation tank and be discharged into the subsequent treatment process.

10. A method for treating sewage using the primary sedimentation tank according to claim 7, characterized in that: Open the first water inlet gate, the second water inlet gate, and the third water inlet gate, close the fourth water inlet gate and the overrun gate, and allow all sewage to enter the first primary sedimentation tank, the second primary sedimentation tank, and the third primary sedimentation tank for treatment; Open the first sludge discharge valve B, the second sludge discharge valve B, and the third sludge discharge valve B, close the first sludge discharge valve A, the second sludge discharge valve A, and the third sludge discharge valve A, and open the first sludge valve and the second sludge valve to allow primary sludge, other sludge, and residual sludge to be connected to the sludge water inlet pipe; Open the fourth mud inlet valve, close the first mud inlet valve, the second mud inlet valve, and the third mud inlet valve, and connect the sludge inlet pipe to the fourth primary settling tank; Open the fourth mud discharge valve A, close the fourth mud discharge valve B, and connect the discharged mud to the sludge treatment system; Determine whether the supernatant of the fourth primary sedimentation tank is connected to the designated carbon source addition point. If so, open the fourth outlet valve B, close the fourth outlet valve A, and start the supernatant pump to send the supernatant to the designated carbon source addition point; otherwise, open the fourth outlet valve A, close the fourth outlet valve B, and directly connect the supernatant to the outlet channel, and merge with the outlet water of the first primary sedimentation tank, the second primary sedimentation tank, and the third primary sedimentation tank to be discharged into the subsequent treatment process.

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