Defoaming, sterilizing and anti-scaling treatment device for biochemical pool and leachate biochemical system

Abstract

The utility model relates to a defoaming, sterilizing and anti-scaling treatment device for a biochemical pool and a leachate biochemical system.The defoaming, sterilizing and anti-scaling treatment device for the biochemical pool comprises a spraying mechanism, a stirring mechanism, a stirring mechanism and a control mechanism, one end of the back-spraying mechanism is connected with the lower part in the biochemical pool, and the other end of the back-spraying mechanism is connected with the spraying mechanism; the back-spraying mechanism is used for conveying muddy water in the biochemical pool to the spraying mechanism; a sterilizing agent adding mechanism, a tap water adding mechanism, an acid adding mechanism and a defoaming agent adding mechanism; the bactericide adding mechanism, the tap water adding mechanism, the acid adding mechanism and the defoaming agent adding mechanism are all connected with the spraying mechanism. The three functions of defoaming, scaling prevention and sterilization are integrated, multiple purposes are achieved through one machine, biochemical muddy water can be recycled between the spraying mechanism and the biochemical pool, the utilization rate of water resources is greatly increased, and the consumption of chemicals is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of leachate treatment, and in particular to a defoaming, sterilizing and scale-preventing treatment device for a biochemical tank and a leachate biochemical system. BACKGROUND

[0002] During the process of waste treatment, a byproduct, leachate, containing various harmful substances will be produced. If not properly treated before being discharged, it will cause serious pollution and damage to the soil, water sources and ecological mechanisms. Therefore, how to effectively treat waste leachate and prevent it from causing harm to the environment has become an important problem to be solved in the current waste treatment field.

[0003] Leachate is sewage filtered out during the process of waste filling or stacking due to fermentation, precipitation and immersion of surface water. The concentration of pollutant substances is high, it has a foul odor, the water quality and quantity change greatly, it contains toxic pollutants such as high ammonia nitrogen and heavy metal ions, and it is chemically unstable, making it difficult to treat. The main pollutants are COD, ammonia nitrogen, total nitrogen, chlorine (salinity), hardness (calcium and magnesium ions), suspended substances and heavy metal ions.

[0004] Biochemical treatment is a commonly used technology in the process of wastewater treatment, which is widely adopted in the field of wastewater treatment due to its high efficiency, low cost and simple operation. It can use the metabolic activity of microorganisms to remove harmful organic matter such as ammonia nitrogen, total nitrogen, chemical oxygen demand (COD) and biological oxygen demand (BOD5). Currently, various technologies such as activated sludge method, CASS, CAST, SBR, MBR, contact oxidation and oxidation ditch are widely used in this field. In particular, A-A-O (anaerobic-anoxic-aerobic) and A-O (anoxic-aerobic) activated sludge method and its supporting technology can effectively achieve the goal of denitrification and phosphorus removal according to different water quality requirements. These processes usually use air aeration as the oxygen supply method for activated sludge method. For example, municipal wastewater treatment plants often use a combination of A-A-O + air aeration + secondary sedimentation tank, while waste leachate treatment tends to use a combination of A-O + air aeration + ultrafiltration.

[0005] However, due to the characteristics of high ammonia nitrogen, high organic matter concentration, high hardness (calcium and magnesium ions) and the like, the landfill leachate will produce high load in the biochemical treatment process, resulting in intense reaction, and the biochemical foam in the nitrification tank and denitrification tank is significantly increased. The production of these foams reduces the efficiency of the dissolved oxygen in the tank body, which will seriously affect the water quality of the aerobic tank effluent, especially in the wet season, the biochemical tank load is increased, and if it is not properly adjusted, combined with high temperature in summer, the biochemical reaction will be more intense. If the circulation cooling control is not effective, the foam will be further increased, which may cause sludge foam overflow, not only constitutes an environmental protection hidden danger, but also increases the manual operation cost of the leachate treatment station. Long-term dependence on defoaming agent and other chemical agents to control foam may be effective in the short term, but it will significantly increase the operating cost. More importantly, if the agent is not properly selected, such as a defoaming agent containing silicon, it will cause serious blockage to the subsequent membrane mechanism (such as ultrafiltration membrane), resulting in environmental protection indicators exceeding the standard and affecting the overall treatment effect.

[0006] Therefore, how to effectively manage the biochemical foam and avoid excessive reliance on agents has become an important challenge to improve treatment efficiency, reduce cost and ensure environmental protection standards. At the same time, due to the characteristics of high hardness (calcium and magnesium ions) and the like of the leachate, if the Ph value is not properly controlled in the biochemical mechanism, not only will it increase the degree of fouling of the plate heat exchanger in the cooling sludge mechanism (nitrate backflow mechanism), but also will affect the service life and operating cost of the subsequent membrane mechanism in the nanofiltration and reverse osmosis. Practical new type content

[0007] In order to solve the problems of bubble in the biochemical tank and fouling of the heat exchanger in the cooling mechanism which exist in the current technology, the present application provides a defoaming, sterilizing and anti-fouling treatment device for a biochemical tank and a leachate biochemical system, which integrates defoaming, anti-fouling and sterilizing functions and can perform defoaming, sterilizing and anti-fouling cooperative treatment on the biochemical tank.

[0008] Specifically, the present application provides a defoaming, sterilizing and anti-fouling treatment device for a biochemical tank, which comprises:

[0009] A spraying mechanism is arranged in the upper part of the biochemical tank.

[0010] A back-spraying mechanism is connected to the lower part of the biochemical tank at one end and connected to the spraying mechanism at the other end, and is used to transport the sludge water in the biochemical tank to the spraying mechanism.

[0011] A sterilizing agent adding mechanism, tap water adding mechanism, acid adding mechanism and defoaming agent adding mechanism are connected to the spraying mechanism.

[0012] Further, it further comprises:

[0013] A common pipeline is connected to the sterilizing agent adding mechanism, the tap water adding mechanism, the acid adding mechanism and the defoaming agent adding mechanism respectively; the common pipeline is also connected to the spraying mechanism; the sterilizing agent adding mechanism, the tap water adding mechanism, the acid adding mechanism and the defoaming agent adding mechanism add sterilizing agent, tap water, acid solution and defoaming agent to the spraying mechanism through the common pipeline respectively.

[0014] Further, the back spraying mechanism comprises:

[0015] A water inlet pipeline, one end of which is connected to the lower part of the biochemical tank; an outlet electric valve, a back spraying pump water inlet electric valve and a back spraying pump are sequentially arranged on the water inlet pipeline; and

[0016] A water outlet pipeline, one end of which is connected to the other end of the water inlet pipeline, and the other end of which is connected to the spraying mechanism; a back spraying pump water outlet electric valve is arranged on the water outlet pipeline.

[0017] Further, the spraying mechanism comprises:

[0018] A nozzle support arranged in the biochemical tank; and

[0019] A nozzle arranged on the nozzle support, which is connected to the water outlet pipeline and the common pipeline.

[0020] Further, the acid adding mechanism comprises an acid adding pump, an acid storage tank and an acid control valve; the acid washing solution is stored in the acid storage tank, and a first liquid level alarm is arranged in the acid storage tank.

[0021] Further, the defoaming agent adding mechanism comprises a defoaming agent adding pump, a defoaming agent storage tank and a defoaming agent control valve; the defoaming agent storage tank stores the defoaming agent without silicon, and a second liquid level alarm is arranged in the defoaming agent storage tank.

[0022] Further, the tap water adding mechanism comprises a tap water adding pump, a tap water storage tank and a tap water control valve; the tap water storage tank stores the tap water without free chlorine, and a third liquid level alarm is arranged in the tap water storage tank.

[0023] Further, the sterilizing agent adding mechanism comprises a sterilizing agent adding pump, a sterilizing agent storage tank and a sterilizing agent control valve; the sterilizing agent storage tank stores the non-oxidizing sterilizing agent, and a fourth liquid level alarm is arranged in the sterilizing agent storage tank.

[0024] Further, it further comprises:

[0025] An infrared detection probe for monitoring the liquid level height of biochemical foam, the pH value of biochemical sewage and the sludge position of the biochemical tank;

[0026] a data center for storing data monitored by the infrared detection probe; the data center comprises a controller; the controller is used for:

[0027] When the liquid level of the biochemical pool reaches or exceeds the preset liquid level, the controller starts the back-spraying pump to transport the sludge water in the biochemical pool to the spraying mechanism to realize spraying physical defoaming;

[0028] When the liquid level of the biochemical pool is lower than the preset liquid level, the controller stops the operation of the back-spraying pump, the infrared detection probe monitors the pH value, if the pH value reaches or exceeds 6.5, the controller controls the acid adding pump to start to introduce acid solution into the spraying mechanism; when the pH value drops below 6.5, the controller controls the acid adding pump to stop operating;

[0029] If the liquid level of the biochemical pool remains unchanged for 5 consecutive minutes and reaches or exceeds the preset liquid level, the controller controls the defoaming agent adding pump and the tap water adding pump to start simultaneously to transport the defoaming agent and tap water to the spraying mechanism for spraying treatment; when the liquid level of the biochemical pool drops below the preset liquid level, the controller controls the defoaming agent adding pump and the tap water adding pump to stop operating.

[0030] In addition, the present application also provides a leachate biochemical system comprising a biochemical pool, and a defoaming, sterilizing and anti-fouling treatment device as described above, which is used for the defoaming, sterilizing and anti-fouling synergistic treatment of the biochemical pool.

[0031] Compared with the prior art, the present application has the following beneficial effects:

[0032] The defoaming, sterilizing and anti-fouling functions are integrated, not only efficiently solving the problem of overflow of foam in the biochemical pool, reducing the temperature in the pool and cutting the operation cost, effectively avoiding the occurrence of environmental protection accidents, but also significantly slowing down the fouling speed of the plate heat exchanger and the membrane assembly, ensuring that the water quality meets the standard, in addition, effectively sterilizing the abnormal bacteria in the biochemical pool, thereby ensuring the stable operation of the entire biochemical mechanism.

[0033] The integrated PH probe and data center (including controller) respectively monitor the liquid level of biochemical foam, the pH value of biochemical sewage, and the mud level of the biochemical tank, achieving high degree of automatic intelligent control. When the pH value of the biochemical sewage and the liquid level of the biochemical tank (water + foam) reach the preset threshold, the data center will automatically control the start and stop of the whole device pump, and accurately introduce the appropriate amount of solution into the spraying mechanism; significantly reducing the necessity of manual intervention, effectively reducing the risk of operation errors, and dynamically optimizing the defoaming and pH value adjustment process according to the specific situation, ensuring the quality of defoaming and pH value adjustment, while also improving the stability and reliability of the mechanism.

[0034] Based on the traditional defoaming technology, the bactericide treatment link is integrated, which can accurately evaluate the growth trend of microorganisms in the biochemical tank through SV30 (sludge settling ratio) detection and microscopic analysis, and through the intelligent control of the data center (including the controller), the bactericide adding mechanism can be started in time to intervene the filamentous bacteria in the tank in time and effectively, while accurately controlling the amount of D0 (dissolved oxygen) to maintain the stability of the biochemical environment, improving the efficiency of defoaming and anti-fouling.

[0035] The defoaming, anti-fouling and sterilization functions are integrated, which simplifies the operation process and improves the overall processing efficiency; the back-spraying mechanism is cleverly configured to realize the optimal allocation and efficient use of water resources, significantly reducing the overall consumption of the mechanism. The spraying mechanism and the back-spraying mechanism are intelligently connected through precise electric valves, the back-spraying pump accurately extracts mud water from the middle of the biochemical tank and delivers it to the spraying mechanism. Then, the biochemical foam is precisely defoamed by high-efficiency nozzles. The biochemical mud water can form a virtuous cycle between the spraying mechanism and the biochemical tank, greatly improving the recycling rate of water resources, while effectively reducing the amount of chemicals used. The application not only conforms to the development concept of energy saving and environmental protection, but also sets a "cost reduction and efficiency increase" model for the industry, which has far-reaching significance.

[0036] Each tank is provided with a liquid level alarm, which provides an important guarantee for the safe operation of the mechanism. The liquid level alarm can timely remind the staff of the liquid level of the solution in each tank, avoid affecting the defoaming effect, anti-fouling efficiency, sterilization effect due to insufficient solution, or causing safety accidents such as leakage due to high liquid level. At the same time, through reasonable pipeline layout and equipment connection, it ensures that the equipment and personnel will not be harmed during the process of adding chemicals and solutions, providing a safe and reliable guarantee for the leachate treatment process of the waste incineration plant. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0038] The structure, proportion, size and the like shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application, so they do not have technical substantive significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0039] Figure 1 It is a structural schematic diagram of a defoaming, sterilizing and scale preventing treatment device for a biochemical tank in the embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application.

[0041] In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices, elements, modules, systems, platforms or devices indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application. The following description of the present application is only for understanding as the description of individual embodiments of the technical solutions of the present application, and other embodiments are not embodied in the following description, but it does not mean that the present application excludes these other embodiments, the technical solutions of the present application are also not limited to the specific embodiments described below, and the protection scope of the present application is also not limited to only the specific embodiments described below. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0042] It is to be noted that, if the terms "first", "second" and the like appear in the description and claims of the present application and in the above description of the drawings, the description is only for distinguishing similar objects, and does not necessarily indicate or imply a specific order or sequence. It should be understood that the data thus used in the description and claims of the present application can be interchanged, where appropriate, so that the embodiments of the present application described herein can be carried out in other than the order shown or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a system, product or apparatus that comprises a series of elements or modules or modules or components does not have to be limited to those elements or modules or modules or components clearly listed, but can include other components not clearly listed or inherent to these systems, products or apparatus.

[0043] The technical scheme of the present application is further illustrated below in conjunction with the drawings and through specific embodiments.

[0044] In some embodiments, as shown in Figure 1 The present application provides a defoaming, sterilizing and anti-fouling treatment device for a biochemical tank 14, which comprises a spraying mechanism arranged in the upper part of the biochemical tank 14; the spraying mechanism comprises a spray head support 16 and a spray head 15.

[0045] A back-spraying mechanism, one end of which is connected to the lower part of the biochemical tank 14, and the other end of which is connected to the spraying mechanism; the back-spraying mechanism is used to transport the sludge water in the biochemical tank 14 to the spraying mechanism; the back-spraying mechanism comprises a water inlet pipeline 18, one end of which is connected to the lower part of the biochemical tank 14; the water inlet pipeline 18 is sequentially provided with an outlet electric valve 17, a back-spraying pump water inlet electric valve 19 and a back-spraying pump 20; the back-spraying mechanism comprises a water outlet pipeline 21, one end of which is connected to the other end of the water inlet pipeline 18, and the other end of which is connected to the spraying mechanism; the water outlet pipeline 21 is provided with a back-spraying pump water outlet electric valve 22.

[0046] A bactericide adding mechanism, a tap water adding mechanism, an acid adding mechanism and a defoaming agent adding mechanism; the bactericide adding mechanism, the tap water adding mechanism, the acid adding mechanism and the defoaming agent adding mechanism are all connected to the spraying mechanism. A common pipeline 13 is connected to the bactericide adding mechanism, the tap water adding mechanism, the acid adding mechanism and the defoaming agent adding mechanism respectively; the common pipeline 13 is also connected to the spraying mechanism; the bactericide adding mechanism, the tap water adding mechanism, the acid adding mechanism and the defoaming agent adding mechanism add bactericide, tap water, acid solution and defoaming agent to the spraying mechanism through the common pipeline 13 respectively.

[0047] The spraying mechanism comprises a shower head support 16 arranged in the biochemical tank 14, and a shower head 15 arranged on the shower head support 16, wherein the shower head 15 is connected with the water outlet pipeline 21 and the common pipeline 13.

[0048] The device ingeniously connects the biochemical tank 14 with the water inlet pipeline 18 of the back-spraying mechanism, which is composed of a series of precise components, thereby ensuring the effective circulation and accurate spraying of the sludge and water. In addition, a common defoaming agent, tap water, acid solution and bactericide adding pipeline 13 is designed to realize the addition of multiple substances.

[0049] In some embodiments, as shown in Figure 1 The acid adding mechanism comprises an acid adding pump 8, an acid storage tank 7 and an acid control valve 9. The acid storage tank 7 stores acid washing solution, and a first liquid level alarm is arranged in the acid storage tank 7.

[0050] In some embodiments, as shown in Figure 1 The defoaming agent adding mechanism comprises a defoaming agent adding pump 11, a defoaming agent storage tank 10 and a defoaming agent control valve 12. The defoaming agent storage tank 10 stores defoaming agent without silicon, and a second liquid level alarm is arranged in the defoaming agent storage tank 10.

[0051] In some embodiments, as shown in Figure 1 The tap water adding mechanism comprises a tap water adding pump 5, a tap water storage tank 4 and a tap water control valve 6. The tap water storage tank 4 stores tap water without free chlorine, and a third liquid level alarm is arranged in the tap water storage tank 4.

[0052] In some embodiments, as shown in Figure 1 The bactericide adding mechanism comprises a bactericide adding pump 2, a bactericide storage tank 1 and a bactericide control valve 3. The bactericide storage tank 1 stores non-oxidizing bactericide, and a fourth liquid level alarm is arranged in the bactericide storage tank 1.

[0053] In some embodiments, as shown in Figure 1 Further comprising:

[0054] An infrared detection probe 24 is arranged for monitoring the liquid level height of biochemical foam in the biochemical tank 14, the pH value of biochemical sewage and the sludge position.

[0055] A data center 23 is arranged for storing the data monitored by the infrared detection probe 24. The data center comprises a controller. The controller is used for:

[0056] When the liquid level of the biochemical tank 14 reaches or exceeds the preset liquid level, the controller starts the back-spraying pump 20 to transport the sludge water in the biochemical tank to the spraying mechanism to realize the spraying physical defoaming; the preset liquid level can be 2 / 3 of the effective liquid level.

[0057] When the liquid level of the biochemical tank 14 is lower than the preset liquid level, the controller stops the operation of the back-spraying pump 20, the infrared detection probe 24 monitors the pH value, and if the pH value reaches or exceeds 6.5, the controller controls the acid adding pump 8 to start to introduce the acid solution into the spraying mechanism; when the pH value drops below 6.5, the controller controls the acid adding pump 8 to stop operating.

[0058] If the liquid level of the biochemical tank 14 remains unchanged for 5 consecutive minutes and reaches or exceeds the preset liquid level, the controller controls the defoaming agent adding pump 11 and the tap water adding pump 5 to start simultaneously to transport the defoaming agent and the tap water to the spraying mechanism for spraying treatment; when the liquid level of the biochemical tank 14 drops below the preset liquid level, the controller controls the defoaming agent adding pump 11 and the tap water adding pump 5 to stop operating.

[0059] The present application can realize the flexible switching of the sterilizing agent control valve 3, the tap water control valve 6, the acid solution control valve 9 and the defoaming agent control valve 12, and realizes the accurate adding of different solutions. The solutions are stored in 10-ton-capacity storage tanks (sterilizing agent storage tank 1, tap water storage tank 4, acid solution storage tank 7 and defoaming agent storage tank 10), and each storage tank is provided with a liquid level detection alarm, which issues an alarm when the liquid level is lower than 1.3 meters, to ensure sufficient solution. The infrared detection probe 24 acts as an “eye” to monitor the liquid level of the biochemical foam, the pH value of the biochemical sewage and the sludge level of the biochemical tank in real time, and transmit the data to the data center 23, and the data center 23 controller preferably uses a PLC or DCS mechanism to realize intelligent control.

[0060] In particular, in certain seasons, if a large number of abnormal organisms such as filamentous bacteria are found to multiply by SV30 test and microscopic examination, the operator can manually start the sterilizing agent adding pump 2 to effectively degrade these abnormal organisms, to ensure the stable operation of the biochemical mechanism. The present application realizes the integration of defoaming, sterilization and anti-fouling through the intelligent control mechanism and the efficient spraying, back-spraying and adding mechanism, and provides comprehensive protection for the safe and efficient operation of the leachate biochemical mechanism.

[0061] In addition, the present application also provides a leachate biochemical system, which comprises a biochemical tank 14 and a defoaming, sterilizing and anti-fouling treatment device as described above, and the defoaming, sterilizing and anti-fouling treatment device is used for the defoaming, sterilizing and anti-fouling cooperative treatment of the biochemical tank 14.

[0062] Compared with the prior art, the present application has the following advantages:

[0063] Compared with the traditional single biochemical mechanism defoaming device, the device has obvious innovation advantages, skillfully integrates defoaming, anti-fouling and sterilization functions into one, realizes true multi-purpose of one machine, greatly reduces the investment of material cost, effectively reduces the cost expenditure in operation process, and has high economy and practicability.

[0064] The sterilizing agent adding link is additionally arranged. Through the advanced strain detection technology, different strains existing in the biochemical mechanism can be monitored in real time and accurately, and the sterilizing agent can be added in time and accurately according to the strains, so that the stability of the biochemical mechanism is enhanced, the mechanism fluctuation or failure caused by abnormal propagation of the strains is effectively prevented, and the continuous and efficient operation of the whole biochemical treatment process is ensured.

[0065] The back spraying mechanism is adopted, so that the biochemical sludge water can be recycled between the spraying mechanism and the biochemical tank, the utilization rate of water resources is greatly improved, the consumption of the reagent is reduced, the development concept of energy saving and environmental protection is met, and the exemplary role of reducing cost and increasing efficiency in the leachate industry is played.

[0066] The operation is simple: the whole cleaning process is automatically controlled, manual operation is reduced, and work efficiency is improved; maintenance is convenient: the water pump of the whole device is a simple adding pump, and the nozzle is simple, the maintenance cost is low, and the maintenance is convenient; environmental protection and energy saving: the pickling solution after cleaning is treated by neutralization to reach the discharge standard, and the influence on the environment is reduced.

[0067] The technical features of the above embodiments can be combined arbitrarily, in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that it is within the scope of the present application.

[0068] The above described embodiments only express several implementation manners of the present application, and are only used to illustrate the technical scheme of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical scheme recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the spirit and scope of the technical scheme of the embodiments of the present application, and those skilled in the art can make several modifications and improvements without departing from the concept of the present application, which all belong to the protection scope of the present application.

Claims

1. A defoaming, sterilizing and anti-fouling treatment device for a biochemical tank, characterized in that, The device comprises: a spraying mechanism arranged in the biochemical tank and located at the upper part of the biochemical tank; a back-spraying mechanism connected to the lower part of the biochemical tank at one end and connected to the spraying mechanism at the other end, the back-spraying mechanism being used to transport the sludge water in the biochemical tank to the spraying mechanism; a bactericide adding mechanism, a tap water adding mechanism, an acid adding mechanism, and a defoaming agent adding mechanism, all of which are connected to the spraying mechanism. The device further comprises:

2. The device for defoaming, sterilizing and scale-inhibiting treatment of a biochemical tank according to claim 1, characterized in that, a common pipeline connected to the bactericide adding mechanism, the tap water adding mechanism, the acid adding mechanism, and the defoaming agent adding mechanism respectively, and further connected to the spraying mechanism, the bactericide adding mechanism, the tap water adding mechanism, the acid adding mechanism, and the defoaming agent adding mechanism adding bactericide, tap water, acid solution, and defoaming agent to the spraying mechanism through the common pipeline respectively. The back-spraying mechanism comprises:

3. The device for defoaming, sterilizing and scale-inhibiting treatment of a biochemical tank according to claim 2, characterized in that, a water inlet pipeline connected to the lower part of the biochemical tank at one end, the water inlet pipeline being sequentially provided with an outlet electric valve, a back-spraying pump water inlet electric valve, and a back-spraying pump; and a water outlet pipeline connected to the other end of the water inlet pipeline at one end and connected to the spraying mechanism at the other end, the water outlet pipeline being provided with a back-spraying pump water outlet electric valve. The spraying mechanism comprises:

4. The device for defoaming, sterilizing and scale-inhibiting treatment of a biochemical tank according to claim 3, characterized in that, a nozzle support arranged in the biochemical tank; and a nozzle arranged on the nozzle support, the nozzle being connected to the water outlet pipeline and the common pipeline.

5. The device for the biochemical tank according to claim 4, wherein: the acid adding mechanism comprises an acid adding pump, an acid storage tank, and an acid control valve, the acid storage tank storing acid washing solution, and the acid storage tank being provided with a first liquid level alarm.

6. The device for the biochemical tank according to claim 5, wherein: the defoaming agent adding mechanism comprises a defoaming agent adding pump, a defoaming agent storage tank, and a defoaming agent control valve, the defoaming agent storage tank storing defoaming agent without silicon, and the defoaming agent storage tank being provided with a second liquid level alarm.

7. The device for the biochemical tank according to claim 6, wherein: the tap water adding mechanism comprises a tap water adding pump, a tap water storage tank, and a tap water control valve, the tap water storage tank storing tap water without free chlorine, and the tap water storage tank being provided with a third liquid level alarm.

8. The device for the biochemical tank according to claim 7, wherein: the bactericide adding mechanism comprises a bactericide adding pump, a bactericide storage tank, and a bactericide control valve, the bactericide storage tank storing non-oxidizing bactericide, and the bactericide storage tank being provided with a fourth liquid level alarm. The device further comprises:

9. The device for the biochemical tank according to claim 8, characterized in that, an infrared detection probe used to monitor the liquid level height of biochemical foam, the pH value of biochemical sewage, and the sludge position of the biochemical tank; and a data center used to store the data monitored by the infrared detection probe, the data center comprising a controller, the controller being used to: ​ ​ When the liquid level of the biochemical tank reaches or exceeds the preset liquid level, the controller starts the back-spraying pump to transport the sludge water in the biochemical tank to the spraying mechanism to realize spraying physical defoaming; When the liquid level of the biochemical tank is below the preset liquid level, the controller stops the operation of the back-spraying pump, the infrared detection probe monitors the pH value, if the pH value reaches or exceeds 6.5, the controller controls the acid adding pump to start to introduce acid solution into the spraying mechanism; when the pH value drops below 6.5, the controller controls the acid adding pump to stop running; If the liquid level of the biochemical tank remains unchanged for 5 consecutive minutes and reaches or exceeds the preset liquid level, the controller controls the defoaming agent adding pump and the tap water adding pump to start simultaneously to transport the defoaming agent and tap water to the spraying mechanism for spraying treatment; when the liquid level of the biochemical tank drops below the preset liquid level, the controller controls the defoaming agent adding pump and the tap water adding pump to stop running.

10. A leachate biochemical system comprising a biochemical tank, characterized in that, Also included is the defoaming, sterilizing and scale preventing treatment device according to any one of claims 1-9, which is used for defoaming, sterilizing and scale preventing synergistic treatment of the biochemical tank. Also included is the defoaming, sterilizing and scale preventing treatment device according to any one of claims 1-9, which is used for defoaming, sterilizing and scale preventing synergistic treatment of the biochemical tank.

Images