Pickling application device for improving efficiency of aerator of sewage treatment system

Abstract

The utility model discloses a pickling application device for improving the efficiency of an aerator of a sewage treatment system. The pickling application device comprises an integrated dosing device, the integrated chemical adding device comprises an integrated chemical adding box body, a diaphragm metering pump arranged on the integrated chemical adding box body and a chemical adding hose connected with the integrated chemical adding box body and the diaphragm metering pump; the medicament adding hose is connected with a medicament injection mechanism, and the medicament injection mechanism comprises a medicament injection tube, a back pressure valve assembly, a medicament injection needle tube and a medicament atomizing nozzle which are connected in sequence; the medicament injection needle tube is communicated with the air branch tube, and the medicament atomizing nozzle is positioned in the air branch tube; and an agent backflow mechanism is connected between the agent adding hose and the integrated agent adding box body. According to the utility model, during operation, the efficiency of the aerator is improved in stages through on-line pickling, so that the healthy operation of the aerator is ensured, the occurrence of faults is reduced, the service life is prolonged, and the sewage treatment is more efficient.

Description

TECHNICAL FIELD

[0001] The utility model relates to water conservancy engineering, municipal engineering, water treatment and sewage resource utilization technology, more specifically, relate to a kind of pickling application device for improving the efficiency of sewage treatment system aerator. BACKGROUND

[0002] In the operation process of traditional municipal sewage treatment plant, the aerator is renewed or replaced after first installation and operation until the end of its service life or serious functional degradation.

[0003] There are two methods to solve the problem. The first method is to use underwater aerator as the main type of aeration in sewage treatment plant. After the completion of sewage treatment plant construction and operation, the underwater aerator (aeration disc, aeration pipe) has been continuously injecting oxygen into the water to be treated in the bottom of the sewage treatment tank to ensure sufficient oxygen supply for microorganisms in the tank. Under the action of air supply to the aerator by the air blower, the speed of oxygen transfer from air to sewage is accelerated by stirring the sewage, thereby increasing the oxygen content in the sewage and oxidizing and decomposing organic matter in the sewage. This aeration and oxygenation is one of the main methods of water treatment and an effective measure to improve the quality and efficiency of water treatment. The production of sewage treatment plant and the operation of underwater aerator are also in a continuous working state. Once the aerator is used in the process of complex sewage composition and complex microbial flora, calcium, iron and biological fouling are easily deposited on the aerator membrane during long-term operation, causing the pores of the aeration disc to be blocked, affecting the aeration effect, reducing the oxygenation capacity and stirring performance, greatly reducing the quality and efficiency of sewage treatment, and even losing the function of water quality purification in the sewage treatment process. Forced to stop production, purchase new aerator for replacement or repair, affecting the amount of regional sewage treatment, or causing sewage pipe network well overflow phenomenon, ultimately leading to environmental pollution and other social events. This method not only cannot ensure the continuous operation of the sewage treatment plant, but also brings secondary problems to people's life and production order and urban safe operation.

[0004] The second method is to open holes and weld some joints and pipes on the air pipeline, and forcibly inject controlled dangerous liquids such as dilute sulfuric acid, dilute hydrochloric acid and formic acid with high corrosiveness or strong oxidizing property through these welded joints and pipes to acid wash the aerator and dissolve the fouling deposited on the surface or inside of the aerator, so as to achieve the purpose of smooth aeration. However, due to the use of corrosive and strong oxidizing medium with strong acidity, it initially has a certain effect, but also brings strong corrosive effect to the aerator, shortens the whole life cycle, and brings certain safety factors such as reagent splashing during dosing, which is indeed a helpless way.

[0005] In summary, the main defects of the first method are as follows:

[0006] 1) The sewage treatment plant needs to temporarily stop production to clean the bottom sludge, flush it, and replace the aerator with a new one. The sewage treatment system cannot be operated during the replacement period and is in the shutdown stage. The continuously generated urban sewage cannot be treated;

[0007] 2) Because the aerator is made of special engineering rubber and a special production process, the cost is particularly high. When the replacement cycle is short, the operating cost is greatly increased, which exceeds the company's affordability;

[0008] 3) The underwater aerators currently used in municipal wastewater treatment plants are imported from Western countries, resulting in long procurement cycles and significant challenges in timely installation. This severely limits wastewater treatment capacity. The large amount of wastewater generated cannot be effectively treated by wastewater treatment plants, posing a potential risk to the environment and society.

[0009] The main drawbacks of the second approach are as follows:

[0010] 1) This solution involves directly drilling holes in the existing air ducts to install pipe joints, then using threaded interfaces to connect the acid injection pipes. This allows for direct injection of highly corrosive or highly oxidizing controlled hazardous liquids via centrifugal pumps. This not only poses serious safety concerns regarding acid spraying and splashing, but also poses significant risks to the operational and personal safety of operators, making it prone to workplace accidents.

[0011] 2) Highly corrosive sulfuric acid, hydrochloric acid, and formic acid are all classified as hazardous substances. They are subject to the government's control over hazardous chemicals catalog during procurement, transportation, storage, and use, and are subject to a very high degree of control.

[0012] 3) The solution is too simple in structure during acid injection operation, the joints are not firmly connected, the material is not corrosion-resistant, and the service life is short. Almost after one injection, the joint components will be corroded and lose their closing and opening functions, resulting in air leakage, and production needs to be stopped to repair the corrosive leaking pipeline part. Utility Model Content

[0013] In response to the defects in the existing technology, the purpose of this utility model is to provide a pickling application device for improving the efficiency of the aerator of the sewage treatment system. Through online pickling during operation, the efficiency of the aerator is improved in stages, ensuring the healthy operation of the aerator, while reducing the occurrence of faults, extending the service life, and making sewage treatment more efficient.

[0014] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0015] An acid cleaning application device for improving the efficiency of aerators in sewage treatment systems, including an integrated dosing device;

[0016] The integrated dosing device comprises an integrated dosing box body, a diaphragm metering pump arranged on the integrated dosing box body, and a medicament dosing hose connected to the integrated dosing box body and the diaphragm metering pump;

[0017] The medicament dosing hose is connected with a medicament injection mechanism, and the medicament injection mechanism comprises a medicament injection pipe, a back pressure valve assembly, a medicament injection needle pipe and a medicament atomizing nozzle connected in sequence.

[0018] The medicament injection needle pipe is in communication with an air branch pipe, and the medicament atomizing nozzle is located in the air branch pipe.

[0019] The medicament dosing hose is connected with the integrated dosing box body through a medicament backflow mechanism.

[0020] Preferably, the pickling application device further comprises a dosing trolley for placing the integrated dosing device.

[0021] Preferably, the dosing trolley is provided with a handle on any side thereof.

[0022] The bottom of the dosing trolley is provided with universal wheels.

[0023] Preferably, the medicament dosing hose is provided with a medicament outlet valve.

[0024] Preferably, the medicament dosing hose and the medicament injection pipe are connected through a quick connector.

[0025] Preferably, the medicament injection pipe is provided with a backflow air inlet valve and a medicament inlet valve.

[0026] Preferably, the medicament backflow mechanism comprises a backflow pipe in communication with the medicament dosing hose and the integrated dosing box body, and a backflow valve arranged on the backflow pipe.

[0027] Preferably, the integrated dosing box body is provided with a medicament scale and a droplet recovery device.

[0028] The pickling application device for improving the efficiency of an aerator of a sewage treatment system has the following beneficial effects:

[0029] 1) improving the aeration efficiency of the aerator

[0030] 1.1) removing blockages: during long-term operation of the underwater aerator, calcium, magnesium and other minerals in the water and some impurities will gradually deposit in the micropores or channels of the aerator, forming scale or dirt, blocking the pores of the aerator, reducing the amount of gas passing through, and reducing the aeration effect. The acid pickling can effectively dissolve these scale and dirt, dredge the pores of the aerator, so that the gas can smoothly pass through the aerator, thereby improving the aeration efficiency of the aerator and increasing the oxygen content in the water.

[0031] 1.2) Reduce airflow resistance. The presence of blockages increases the resistance of gas passing through the aerator, requiring the aerator to consume more energy to transport the gas into the water. After the blockage is removed by pickling, the airflow resistance is reduced, the energy consumption of the aerator is reduced, and the burden on air supply equipment such as blowers is also reduced, extending their service life.

[0032] 2) Improved the effluent quality of sewage treatment

[0033] 2.1) Enhanced oxidation: Adequate oxygen supply is crucial for the oxidative decomposition of pollutants in water. Aerators that have been acid-washed can better transport oxygen into the water, increasing the dissolved oxygen concentration, enhancing oxidation, and accelerating the decomposition and conversion of organic matter in the water, thereby improving water quality. For industrial wastewater containing high concentrations of organic pollutants, efficient aeration can improve the biodegradability of the wastewater, creating favorable conditions for subsequent biological treatment.

[0034] 2.2) Reduce sludge sedimentation. Good aeration can keep the water body evenly mixed and prevent sludge from settling and accumulating at the bottom of the water. Sludge sedimentation not only affects the normal operation of the aerator, but also leads to deterioration of water quality and odor. Acid washing improves aeration efficiency, which can reduce sludge sedimentation and keep the water body clean.

[0035] 3) Save operating costs for sewage treatment companies

[0036] 3.1) Reduced energy consumption. As mentioned above, after pickling to remove blockages and reduce airflow resistance, the energy consumption of the aerator is reduced, and the energy consumption of air supply equipment such as blowers is also reduced. In the long-term operation, this can significantly save energy costs;

[0037] 3.2) Extending the service life of the equipment: Regular pickling can promptly remove dirt and impurities that damage the aerator, reducing the corrosion and wear of these substances on the aerator material, thereby extending the service life of the aerator. This can reduce the frequency of equipment replacement and reduce equipment maintenance and replacement costs;

[0038] 4) Ensure the stable operation of the sewage treatment system

[0039] 4.1) Maintaining the stability of treatment results: The aerator is a key piece of equipment in the sewage treatment system, and its operating condition directly affects the effectiveness of sewage treatment. Acid cleaning ensures that the aerator always maintains good aeration performance, thereby ensuring the stable operation of the sewage treatment system and ensuring that the treated water quality meets discharge standards.

[0040] 4.2) Reduce equipment failure rates: Problems such as clogging and corrosion are the main causes of aerator failure. Acid cleaning can effectively prevent and resolve these problems, reduce the incidence of equipment failures, reduce production downtime and repair costs caused by equipment failures, and improve the reliability and operational efficiency of the sewage treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 The utility model is a structural schematic diagram of an acid cleaning application device for improving the efficiency of an aerator in a sewage treatment system. DETAILED DESCRIPTION

[0042] In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0043] Combine Figure 1 As shown, the present invention provides an acid cleaning application device for improving the efficiency of an aerator in a sewage treatment system, including an integrated dosing device 100 .

[0044] The integrated dosing device 100 includes an integrated dosing box 101 , a diaphragm metering pump 102 disposed on the integrated dosing box 101 , and a drug dosing hose 103 connecting the integrated dosing box 101 and the diaphragm metering pump 102 .

[0045] The medicine dosing hose 103 is connected to a medicine injection mechanism, which includes a medicine injection tube 104 , a back pressure valve assembly 105 , a medicine injection needle 106 and a medicine atomizing nozzle 107 , which are sequentially connected to the medicine dosing hose 103 .

[0046] The head of the medicine injection needle 106 is obliquely inserted into the air branch pipe 201 of the aeration system 200 , so that the medicine atomizing nozzle 107 is located inside the air branch pipe 201 .

[0047] A medicine reflux mechanism is connected between the medicine dosing hose 103 and the integrated medicine dosing box 101 . The medicine reflux mechanism includes a reflux pipe 108 connecting the medicine dosing hose 103 and the integrated medicine dosing box 101 , and a reflux valve 109 provided on the reflux pipe 108 .

[0048] A medicine outlet valve 110 is provided on the medicine dosing hose 103 .

[0049] The medicine dosing hose 103 and the medicine injection tube 104 are connected via a quick connector 111 .

[0050] The medicine injection tube 104 is also provided with a reflux air inlet valve 112 and a medicine inlet valve 113 .

[0051] A medicament scale 114 is arranged on the outer side of the integrated medicament adding box 101, and a drop recovery device 115 is arranged on the top.

[0052] The pickling application device also comprises a medicament adding trolley 300 for placing the integrated medicament adding device 100.

[0053] A handle 301 is arranged on any side of the medicament adding trolley 300.

[0054] A plurality of universal wheels 302 are arranged on the bottom of the medicament adding trolley 300.

[0055] The pickling application device is used as follows:

[0056] The integrated medicament adding device 100 is placed on the medicament adding trolley 300, and is moved to a working position through the medicament adding trolley 300, and the medicament (such as low-concentration oxalic acid, which is a general chemical product and is not classified as a dangerous product) for cleaning the aeration system 200 is arranged in the integrated medicament adding box 101.

[0057] The diaphragm metering pump 102 is started to send the medicament in the integrated medicament adding box 101 into the medicament injection pipe 104 through the medicament adding hose 103, the medicament inlet valve 113 is opened, the medicament flows through the medicament injection needle pipe 106, and finally is sprayed out by the medicament atomizing nozzle 107, is atomized after mixing with the air flow in the air branch pipe 201, and then enters the underwater aerator along the aeration pipeline to clean the aeration system 200 in all directions, completes the cleaning and removal of dirt, and restores the aeration.

[0058] When the point position acid cleaning is completed, the diaphragm metering pump 102 stops running, at this time, the high-pressure air in the medicament adding hose 103 keeps a static state under the one-way damping action of the back pressure valve assembly 105. At this time, the backflow air inlet valve 112 is opened to communicate with the atmosphere, and the backflow valve 109 on the upper part of the integrated medicament adding device is opened, and the residual medicament in the medicament adding hose 103 is backflowed to the integrated medicament adding box 101 through the backflow pipe 108, and a complete safety online cleaning and adding operation process is completed.

[0059] The main structure component of the pickling application device is made of 304L stainless steel, and the whole device adopts a unique shape design, and the safety, convenience and flexibility of the medicament supply connecting pipeline are comprehensively considered. Therefore, the high reliability of the medicament injection mechanism is achieved.

[0060] The drug injection needle 106 of the pickling application device of the present invention adopts an oblique insertion installation method. In the air branch pipe 201 part, the drug injection mechanism and the air branch pipe 201 maintain a 45° angle, forming a perfect docking method for the connection between the entire component and the air pipeline, overcoming the problem of the drug injection mechanism being connected in a vertical state, and saving a large patrol activity space.

[0061] In the pickling application device of the present invention, a back pressure valve assembly 105 is arranged on the drug injection needle tube 106, which adopts a pressure resistance level of 1 MPa. The normal working pressure of the air in the air pipe is 0.1 MPa. When the drug is driven by a pressure of 1 MPa, it is injected into the air pipe. During the interval of the injection pulse technology, the air pressure in the pipe is effectively prevented from directing backblowing, and the air is prevented from reversely supplying pressure to the drug supply pipeline system along the injection mechanism, which plays a fundamental damping effect for effectively preventing the backflow of the drug.

[0062] The pickling application device of the present invention adopts a sleeve-type drug injection needle 106 and a unique drug atomizing nozzle 107. First, the sleeve-type drug injection needle 106 is isolated from the external sheath tube, but the sheath tube is welded to the air pipe so that the drug injection mechanism is firmly connected to the air pipe, improving the stability of the installation; secondly, the drug injection needle 106 is embedded in the sheath tube and enters the air pipe, showing a 45° angle and bending down at the center of the DN100 air pipe, so that the drug flow direction is consistent with the air flow. In this way, while the drug is injected, it is quickly atomized under the action of the co-directional flow of large-volume air. The atomized drug is distributed to the aerator at the bottom of the pool with the one-dimensional flow of air and released. At the same time, the dirt in the aerator is quickly dissolved and dredged, and is released and transferred to the sewage under the entrainment of the air flow, thereby achieving a rapid and effective cleaning effect with the aerator.

[0063] In the pickling application device of the present invention, the agent adding hose 103 and the agent injection pipe 104 are connected in a downward bending manner, that is, the inlet of the agent injection pipe 104 is downward, and the outlet of the agent adding hose 103 is upward and connected through a quick connector 111. This approach fully takes into account the gravity return of the residual agent after the acid injection is completed, so that the residual agent can be fully recovered. At the same time, when the back pressure valve assembly 105 fails or is misoperated, the agent or air is released directly to the ground in time, avoiding spraying to the surrounding area or threatening the safety of the staff.

[0064] In summary, the pickling application device of the utility model achieves the goal of materialization, engineering and application, and provides a steam-water mixing state for online cleaning of aerators in sewage treatment plants to extend the service life of aerators, improve the aeration and oxygenation efficiency, and maintain high-quality mass transfer in the sewage treatment process. The pickling application device of the utility model is an innovative idea developed based on the defect that the existing traditional aerators are replaced and repaired according to their own sewage treatment working conditions until the aerators are completely ineffective. During the economic operation life cycle of its use, pickling is carried out in stages to regularly restore its function and efficacy. The pickling application device of the utility model proposes an efficient, safe, fast, flexible, reliable, stable and mobile method and system based on the simple installation of joints in the existing pipeline holes for injection of highly corrosive or highly oxidizing media. A complete set of practical and feasible innovative application devices has been developed, which achieves the ideal cleaning effect of underwater aerators and perfectly solves the purpose of improving the efficiency of aerators by using chemicals for online staged cleaning.

[0065] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A pickling application device for improving the efficiency of aerators in sewage treatment systems, characterized by: Including integrated dosing device; The integrated dosing device includes an integrated dosing box, a diaphragm metering pump provided on the integrated dosing box, and a medicine dosing hose connecting the integrated dosing box and the diaphragm metering pump; The medicine dosing hose is connected to a medicine injection mechanism, which includes a medicine injection tube, a back pressure valve assembly, a medicine injection needle and a medicine atomizing nozzle connected in sequence; The medicine injection needle is connected to the air branch pipe, and the medicine atomizing nozzle is located in the air branch pipe; A medicine reflux mechanism is connected between the medicine dosing hose and the integrated medicine dosing box.

2. The pickling application device for improving the efficiency of aerators in sewage treatment systems according to claim 1, characterized in that: The pickling application device also includes a dosing trolley for placing the integrated dosing device.

3. The pickling application device for improving the efficiency of aerators in sewage treatment systems according to claim 2, characterized in that: A handle is provided on either side of the dosing trolley; The bottom of the dosing trolley is provided with universal wheels.

4. The pickling application device for improving the efficiency of aerators in sewage treatment systems according to claim 1, characterized in that: The medicine adding hose is provided with a medicine outlet valve.

5. The pickling application device for improving the efficiency of aerators in sewage treatment systems according to claim 1, characterized in that: The medicine dosing hose is connected to the medicine injection tube via a quick connector.

6. The pickling application device for improving the efficiency of aerators in sewage treatment systems according to claim 1, characterized in that: The medicine injection tube is provided with a reflux air inlet valve and a medicine inlet valve.

7. The pickling application device for improving the efficiency of aerators in sewage treatment systems according to claim 1, characterized in that: The medicine reflux mechanism includes a reflux pipe connecting the medicine dosing hose and the integrated medicine dosing box, and a reflux valve arranged on the reflux pipe.

8. The pickling application device for improving the efficiency of aerators in sewage treatment systems according to claim 1, characterized in that: The integrated medicine-adding box is provided with a medicine scale and a drip recovery device.

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