Intelligent liftable aeration system for Carrousel oxidation ditch

Abstract

The utility model discloses an intelligent liftable aeration system for a Carrousel oxidation ditch, and belongs to the technical field of sewage treatment. The system comprises an anaerobic zone, an anoxic zone and an aerobic zone which are sequentially connected along the flow direction of sewage, wherein a water inlet pipeline is arranged in the anaerobic zone; a water outlet and an aeration assembly are arranged in the aerobic zone, the aeration assembly comprises an air blower arranged beside the aerobic zone, an air conveying port of the air blower is connected with an air conveying pipe, the air conveying pipe is located above the pool surface and provided with a plurality of air outlets, the air outlets are all connected with detachable air conveying branch pipes, and air outlets of the air conveying branch pipes are connected with lifting type aeration rows; and the lifting type aeration rows are uniformly arranged at the pool bottom area of the aerobic area. According to the utility model, the control on the oxygen supply amount of each lifting type aeration row is realized, the oxygen demand of aerobic bacteria is met, the amount of dissolved oxygen flowing back to an anoxic zone is reduced, the DO in the reflux liquid and the inhibition influence on the denitrification process are reduced, and the hysteresis and corresponding adverse influence caused by the traditional adjustment on the air supply amount by the DO concentration are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an intelligent liftable aeration system for a Carrousel oxidation ditch. Background Art

[0002] Carrousel oxidation ditch is a commonly used sewage treatment process, which is a variation of the activated sludge process. Its advantages include good effluent quality, stable operation, and convenient management, and it has been widely used at home and abroad.

[0003] In the prior art, the Carrousel oxidation ditch often uses a surface aeration system based on an inverted umbrella-type aerator. In aeration control technology, most sewage treatment plants only use dissolved oxygen as the main reference indicator for controlling the aeration volume. However, in actual operation, this method has obvious lag. When the water quality and quantity indicators change greatly, the aeration volume is often not adjusted in time. The amount of aeration directly affects the efficiency of the biological treatment process in the aerobic tank. Too low aeration will lead to low NH3-N removal efficiency, while too high aeration may inhibit processes such as denitrification, thereby affecting the effluent quality and wasting energy. Summary of the invention

[0004] The utility model provides a carrousel oxidation ditch intelligent liftable aeration system, which can intelligently control the aeration volume of the aeration system and can carry out maintenance work of underwater aerators with water.

[0005] To achieve the above-mentioned purpose, the utility model is designed with a Carrousel oxidation ditch intelligent liftable aeration system, comprising an anaerobic zone, an anoxic zone and an aerobic zone connected in sequence along the flow direction of sewage, wherein the anaerobic zone is provided with a water inlet pipe; the aerobic zone is provided with a water outlet and an aeration component, wherein the aeration component comprises a blower arranged beside the aerobic zone, wherein the air outlet of the blower is connected with an air supply pipe, wherein the air supply pipe is fixed above the pool surface on the inner side of the pool wall of the aerobic zone and is provided with a plurality of air outlets, wherein the air outlets are all connected with detachable air supply branch pipes, wherein the air outlets of the air supply branch pipes are connected with liftable aeration rows, and the liftable aeration rows are evenly arranged in the pool bottom area of ​​the aerobic zone.

[0006] Preferably, the lifting aeration row includes an aeration tube support tube, and the two sides of the aeration tube support tube are connected with tubular aerators at even intervals. Fixing frames are installed on the pool walls at both ends of the lifting aeration row, and a detachable bracket is installed on the fixing frame. The detachable bracket is arranged above the water surface. One end of the aeration tube support tube is connected to the air outlet of the air supply branch pipe, and the other end is sealed and fixed to the bottom of the column. The column is fixed to the fixing frame by a detachable bracket, and the air supply branch pipe is fixed to the fixing frame by a detachable bracket. Support frames are installed at both ends of the bottom of the aeration tube support tube. Aeration micropores are evenly distributed on the tubular aerator, and the tubular aerator is made of EPDM material, and the lifting frame, mounting frame and support frame are made of stainless steel.

[0007] Preferably, the distance between the tubular aerator and the bottom of the aerobic zone pool is 15 to 30 cm.

[0008] Preferably, the water inlet pipe is provided with a water inlet flow meter, a COD concentration monitoring instrument and an NH3-N concentration monitoring instrument.

[0009] Preferably, a sludge return port is provided in the anaerobic zone. The sludge returned from the sludge return port refers to the sludge returned to the aeration tank from the sludge concentrated by the secondary sedimentation tank in the aeration tank mixed liquid. The purpose of returning the sludge is to maintain a certain suspended solid concentration in the aeration tank, that is, to maintain a certain microbial concentration.

[0010] Preferably, an oxygen-deficient DO detector is provided in the oxygen-deficient zone.

[0011] Preferably, an aerobic DO detector and a sludge concentration meter are provided in the aerobic zone.

[0012] Preferably, a gas flow meter is provided on the air supply pipe.

[0013] Preferably, an air volume regulating valve is provided between the air supply pipe and the air supply branch pipe.

[0014] Preferably, the Carrousel oxidation ditch intelligent liftable aeration system also includes an intelligent central control, a signal output end of the intelligent central control is connected to a signal receiving end of a blower and an air volume regulating valve, and a signal receiving end of the intelligent central control is connected to a water inlet flow meter, a COD concentration monitoring instrument, an NH3-N concentration monitoring instrument, an anaerobic DO detector, an aerobic DO detector, a sludge concentration meter, and a signal output end of a gas flow meter.

[0015] Beneficial effects of the utility model:

[0016] 1. The utility model collects and analyzes the output signals of the water inlet flow meter, COD concentration monitoring instrument, NH3-N concentration monitoring instrument, anoxic DO detector, aerobic DO detector, sludge concentration meter, and gas flow meter through the intelligent central control, and controls the blower and the air volume regulating valve in real time according to the analysis data, thereby realizing the control of the oxygen supply of each lifting aeration exhaust. While meeting the oxygen demand of aerobic bacteria, the amount of dissolved oxygen returned to the anoxic zone is reduced, the DO in the reflux liquid and the inhibitory effect on the denitrification process are reduced, and the hysteresis and corresponding adverse effects caused by the traditional DO concentration adjustment of the air supply are reduced.

[0017] 2. The utility model adopts bottom aeration, and the tiny bubbles generated by the aeration micropores on the tubular aerator enable the air and sludge mixed liquid to achieve gas-liquid mass transfer. Compared with traditional surface aeration, the oxygen mass transfer efficiency is greatly improved, which can significantly reduce the energy consumption of sewage treatment.

[0018] 3. The utility model can carry water to perform maintenance work on the tubular aerator by arranging a fixing frame, which can reduce the shutdown time of the sewage treatment plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a process flow chart of the utility model;

[0020] Figure 2 This is a structural diagram of the utility model lifting aeration row;

[0021] Reference numerals:

[0022] 1 anaerobic zone, 11 water inlet pipe, 111 water inlet flow meter, 112 COD concentration monitoring instrument, 113 NH3-N concentration monitoring instrument, 12 sludge return port,

[0023] 2 hypoxia area, 21 hypoxia DO detector,

[0024] 3 aerobic zone, 31 water outlet, 32 aerobic DO detector, 33 sludge concentration meter,

[0025] 4 aeration components, 41 blower, 42 air pipe, 43 air branch pipe, 44 lifting aeration row, 441 aeration pipe support pipe, 442 tubular aerator, 443 fixing frame, 444 mounting frame, 445 support frame, 446 column, 45 air volume regulating valve,

[0026] 5. Intelligent central control. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0032] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] like Figures 1-2 The Carrousel oxidation ditch intelligent liftable aeration system shown includes an anaerobic zone 1, an anoxic zone 2 and an aerobic zone 3 connected in sequence along the sewage flow direction;

[0035] The anaerobic zone 1 is provided with a water inlet pipe 11, on which a water inlet flow meter 111, a COD concentration monitoring instrument 112 and an NH3-N concentration monitoring instrument 113 are provided. The anaerobic zone 1 is provided with a sludge return port 12.

[0036] An oxygen-deficient DO detector 21 is provided in the oxygen-deficient area 2 .

[0037] The aerobic zone 3 is provided with a water outlet 31, an aerobic DO detector 32, a sludge concentration meter 33 and an aeration assembly 4. The aeration assembly 4 includes a blower 41 arranged beside the aerobic zone 3. The air outlet of the blower 41 is connected to an air supply pipe 42. The air supply pipe 42 is located above the pool surface and is provided with multiple air outlets. The air outlets are all connected to detachable air supply branches 43. An air volume regulating valve 45 is provided between the air supply pipe 42 and the air supply branch pipe 43. The air outlet of the air supply branch pipe 43 is connected to a lifting aeration row 44. The lifting aeration row 44 is evenly arranged in the pool bottom area of ​​the aerobic zone 3. A gas flow meter 421 is provided on the air supply pipe 42.

[0038] The lifting aeration row 44 includes an aeration tube support tube 441, and the two sides of the aeration tube support tube 441 are evenly spaced and connected with tubular aerators 442. A fixing frame 443 is installed on the pool wall at both ends of the lifting aeration row 44, and a detachable bracket 444 is installed on the fixing frame 443. The detachable bracket 444 is arranged above the water surface. One end of the aeration tube support tube 441 is connected to the air outlet of the air supply branch pipe 43, and the other end is sealed and fixed to the bottom of the column 446. The column 446 is fixed to the fixing frame 443 through the detachable bracket 444, and the air supply branch pipe 43 is fixed to the fixing frame 443 through the detachable bracket 444. The two ends of the bottom of the aeration tube support tube 441 are installed with support frames 445. The distance between the tubular aerator 442 and the bottom of the aerobic zone 3 pool is 15 to 30CM.

[0039] The Carrousel oxidation ditch intelligent liftable aeration system also includes an intelligent central control 5, a signal output end of the intelligent central control 5 is connected to a signal receiving end of the blower 41 and the air volume regulating valve 45, and a signal receiving end of the intelligent central control 5 is connected to a water inlet flow meter 111, a COD concentration monitoring instrument 112, an NH3-N concentration monitoring instrument 113, an anaerobic DO detector 21, an aerobic DO detector 32, a sludge concentration meter 33 and a signal output end of a gas flow meter 421.

[0040] The following describes the process flow of the utility model when it works:

[0041] The sewage to be treated flows into the anaerobic zone 1 along the water inlet pipe 11, and the intelligent central control 5 collects the data of the sewage to be treated collected by the water inlet flow meter 111, the COD concentration monitoring instrument 112 and the NH3-N concentration monitoring instrument 113;

[0042] The sewage to be treated enters the anoxic zone 2 along the anaerobic zone 1, and the intelligent central control 5 collects the data detected by the anoxic DO detector 21, which is used to detect the dissolved oxygen content in the anoxic zone 2 pool;

[0043] The sewage to be treated enters the aerobic zone 3 along the anoxic zone 2 and partially flows back to the anaerobic zone 1. The intelligent central control 5 collects the data collected by the aerobic DO detector 32 and the sludge concentration meter 33. The intelligent central control 5 can calculate the air supply required for the aerobic zone 3 by analyzing the data collected by the water inlet flow meter 111, the COD concentration monitoring instrument 112 and the NH3-N concentration monitoring instrument 113, the anoxic DO detector 21, the aerobic DO detector 32, and the sludge concentration meter 33, and controls the aeration component 4 in real time to aerate the aerobic zone 3;

[0044] When the tubular aerator 442 in the aeration assembly 4 needs maintenance, the air branch pipe 43 at the air outlet end of the air pipe 42 can be removed, and the detachable bracket 444 on the fixed frame 443 can be removed. The detachable bracket 444 is arranged above the water surface, so that water operations can be carried out, and the tubular aerator 442, the air branch pipe 43 and the column 446 can be lifted out of the water with a lifting device for cleaning and maintenance.

[0045] Example 2

[0046] The other structures of Example 2 are substantially the same as those of Example 1, except that the intelligent central control 5 is reduced and manual control is adopted, thereby further reducing the manufacturing cost, as follows:

[0047] The intelligent liftable aeration system of Carrousel oxidation ditch includes anaerobic zone 1, anoxic zone 2 and aerobic zone 3 which are sequentially connected along the sewage flow direction;

[0048] The anaerobic zone 1 is provided with a water inlet pipe 11, on which a water inlet flow meter 111, a COD concentration monitoring instrument 112 and an NH3-N concentration monitoring instrument 113 are provided. The anaerobic zone 1 is provided with a sludge return port 12.

[0049] An oxygen-deficient DO detector 21 is provided in the oxygen-deficient area 2 .

[0050] The aerobic zone 3 is provided with a water outlet 31, an aerobic DO detector 32, a sludge concentration meter 33 and an aeration assembly 4. The aeration assembly 4 includes a blower 41 arranged beside the aerobic zone 3. The air outlet of the blower 41 is connected to an air supply pipe 42. The air supply pipe 42 is located above the pool surface and is provided with multiple air outlets. The air outlets are all connected to detachable air supply branches 43. An air volume regulating valve 45 is provided between the air supply pipe 42 and the air supply branch pipe 43. The air outlet of the air supply branch pipe 43 is connected to a lifting aeration row 44. The lifting aeration row 44 is evenly arranged in the pool bottom area of ​​the aerobic zone 3. A gas flow meter 421 is provided on the air supply pipe 42.

[0051] The lifting aeration row 44 includes an aeration tube support tube 441, and the two sides of the aeration tube support tube 441 are evenly spaced and connected with tubular aerators 442. A fixing frame 443 is installed on the pool wall at both ends of the lifting aeration row 44, and a detachable bracket 444 is installed on the fixing frame 443. The detachable bracket 444 is arranged above the water surface. One end of the aeration tube support tube 441 is connected to the air outlet of the air supply branch pipe 43, and the other end is sealed and fixed to the bottom of the column 446. The column 446 is fixed to the fixing frame 443 through the detachable bracket 444, and the air supply branch pipe 43 is fixed to the fixing frame 443 through the detachable bracket 444. The two ends of the bottom of the aeration tube support tube 441 are installed with support frames 445. The distance between the tubular aerator 442 and the bottom of the aerobic zone 3 pool is 15 to 30CM.

[0052] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A Carrousel oxidation ditch intelligent liftable aeration system, comprising an anaerobic zone (1), an anoxic zone (2) and an aerobic zone (3) connected in sequence along the flow direction of sewage, characterized in that: The anaerobic zone (1) is provided with a water inlet pipe (11); the aerobic zone (3) is provided with a water outlet (31) and an aeration assembly (4); the aeration assembly (4) comprises a blower (41) arranged beside the aerobic zone (3); the air outlet of the blower (41) is connected to an air supply pipe (42); the air supply pipe (42) is fixed above the pool surface on the inner side of the pool wall of the aerobic zone (3) and is provided with a plurality of air outlets; the air outlets are all connected to detachable air supply branch pipes (43); the air outlets of the air supply branch pipes (43) are connected to lifting aeration rows (44); the lifting aeration rows (44) are evenly arranged in the pool bottom area of ​​the aerobic zone (3).

2. The intelligent liftable aeration system for Carrousel oxidation ditch according to claim 1 is characterized in that: The lifting aeration row (44) comprises an aeration pipe support pipe (441), and both sides of the aeration pipe support pipe (441) are connected with tubular aerators (442) at even intervals. Fixing frames (443) are installed on the pool walls at both ends of the lifting aeration row (44), and a detachable bracket (444) is installed on the fixing frame (443). The detachable bracket (444) is arranged above the water surface. One end of the aeration pipe support pipe (441) is connected to the air outlet of the air supply branch pipe (43), and the other end is sealed and fixed to the bottom of a column (446). The column (446) and the fixing frame (443) are fixed by the detachable bracket (444), and the air supply branch pipe (43) and the fixing frame (443) are fixed by the detachable bracket (444). Support frames (445) are installed at both ends of the bottom of the aeration pipe support pipe (441).

3. The intelligent liftable aeration system for Carrousel oxidation ditch according to claim 2 is characterized in that: The distance between the tubular aerator (442) and the bottom of the aerobic zone (3) is 15 to 30 cm.

4. The intelligent liftable aeration system for Carrousel oxidation ditch according to claim 1 is characterized in that: The water inlet pipeline (11) is provided with a water inlet flow meter (111), a COD concentration monitoring instrument (112) and an NH3-N concentration monitoring instrument (113).

5. The intelligent liftable aeration system for Carrousel oxidation ditch according to claim 1 is characterized in that: A sludge return port (12) is provided in the anaerobic zone (1).

6. The intelligent liftable aeration system for Carrousel oxidation ditch according to claim 1 is characterized in that: An oxygen-deficient DO detector (21) is provided in the oxygen-deficient area (2).

7. The intelligent liftable aeration system for Carrousel oxidation ditch according to claim 1 is characterized in that: An aerobic DO detector (32) and a sludge concentration meter (33) are provided in the aerobic zone (3).

8. The intelligent liftable aeration system for Carrousel oxidation ditch according to claim 1 is characterized in that: The air delivery pipe (42) is provided with a gas flow meter (421).

9. The intelligent liftable aeration system for Carrousel oxidation ditch according to claim 1 is characterized in that: An air volume regulating valve (45) is provided between the air supply pipe (42) and the air supply branch pipe (43).

10. The Carrousel oxidation ditch intelligent liftable aeration system according to any one of claims 1 to 9, characterized in that: The Carrousel oxidation ditch intelligent liftable aeration system further comprises an intelligent central control (5), wherein a signal output end of the intelligent central control (5) is connected to a signal receiving end of a blower (41) and an air volume regulating valve (45), and a signal receiving end of the intelligent central control (5) is connected to a water inlet flow meter (111), a COD concentration monitoring instrument (112), an NH3-N concentration monitoring instrument (113), an anoxic DO detector (21), an aerobic DO detector (32), a sludge concentration meter (33), and a signal output end of a gas flow meter (421).

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