Defoaming device for landfill leachate nitrification tank

Abstract

The utility model provides a landfill leachate nitrification tank defoaming device which comprises a nitrification tank, a defoaming structure and a liquid level detection mechanism, and the defoaming structure and the liquid level detection mechanism are both arranged in the nitrification tank; the defoaming structure comprises a physical defoaming structure and a chemical defoaming structure, the physical defoaming structure is used for sucking leachate in the nitrification tank and spraying foam in the nitrification tank, and the chemical defoaming structure is used for adding a defoaming agent into the foam in the nitrification tank; the liquid level detection mechanism comprises a throw-in type liquid level meter and a radar liquid level meter, the throw-in type liquid level meter is used for monitoring the water level in the pool, and the radar liquid level meter is used for monitoring the water level in the pool and the total foam height. The two composite liquid level meters are directly arranged in the nitrification tank, the problem that the height of foam in the tank is not accurately monitored by a single liquid level meter is solved, physical defoaming and chemical defoaming are combined for defoaming, poor effect of single physical defoaming is avoided, influence of single chemical defoaming on growth of microorganisms is avoided, and the quality of the microorganisms is improved. And relatively high chemical agent cost is caused.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, and particularly to an anti-foaming device for a nitrification tank of landfill leachate. Background Art

[0002] In the process of landfill leachate treatment, the biochemical system of the activated sludge method is widely adopted as a relatively economical treatment means. The main function of the biochemical system is to reduce the concentrations of pollutants such as organic matter and ammonia nitrogen. The high-concentration organic matter in the leachate is degraded under the metabolism of microorganisms, thereby generating a large amount of foam. However, the excessive foam in the leachate biochemical system may directly affect the metabolism of microorganisms, leading to adverse situations such as a decrease in the performance of activated sludge and a deterioration of the effluent quality.

[0003] The patent document with the publication number of CN220223685U discloses an automatic anti-foaming device for a nitrification tank of landfill leachate, including the following: a nitrification tank provided with an anti-foaming mechanism; a denitrification tank communicated with the nitrification tank through a flow hole, and the designed liquid levels of the two tanks are communicated through a foam hole; a liquid level detection mechanism for detecting the total height H1 of the leachate and foam in the nitrification tank or the denitrification tank and the height H2 of the leachate liquid level in the nitrification tank or the denitrification tank; a control module for controlling the anti-foaming mechanism to be turned on when the height difference ΔH between H1 and H2 reaches a preset value. The anti-foaming mechanism adopts an anti-foaming pump, and an anti-foaming nozzle is arranged in the nitrification tank. This solution controls the anti-foaming mechanism to be turned on when the height difference ΔH between H1 and H2 reaches a preset value through the control module, and automatically starts or stops the anti-foaming mechanism according to the actual height of the foam in the tank. However, this solution has the following defects:

[0004] (1) The denitrification tank is communicated with the nitrification tank, and the liquid level measurement of the height difference ΔH between H1 and H2 may not be accurate;

[0005] (2) Adopting a single anti-foaming pump method, when the foam in the tank is too high, the anti-foaming effect is poor. Summary of the Utility Model

[0006] Aiming at the defects in the prior art, the purpose of the utility model is to provide an anti-foaming device for a nitrification tank of landfill leachate.

[0007] According to the anti-foaming device for a nitrification tank of landfill leachate provided by the utility model, it includes a nitrification tank, an anti-foaming structure and a liquid level detection mechanism, and both the anti-foaming structure and the liquid level detection mechanism are arranged in the nitrification tank;

[0008] The anti-foaming structure includes a physical anti-foaming structure and a chemical anti-foaming structure. The physical anti-foaming structure is used to suck the leachate in the nitrification tank and spray the foam in the nitrification tank, and the chemical anti-foaming structure is used to add an anti-foaming agent to the foam in the nitrification tank;

[0009] The liquid level detection mechanism includes a submersible liquid level gauge and a radar liquid level gauge. The submersible liquid level gauge is used to monitor the water level height H1 in the tank, and the radar liquid level gauge is used to monitor the water level and the total height H of the foam in the tank.

[0010] Preferably, the physical defoaming structure includes:

[0011] Nozzles, which are arranged above the nitrification tank and used to spray the foam in the nitrification tank;

[0012] A defoaming pump, whose inlet and outlet are respectively connected to the internal space of the nitrification tank and the nozzles through liquid guiding pipelines, and is used to suck the leachate in the nitrification tank to the nozzles through the liquid guiding pipelines.

[0013] Preferably, the chemical defoaming structure includes:

[0014] An antifoaming agent storage tank, which is used to store the antifoaming agent;

[0015] An antifoaming agent dosing pump, whose inlet and outlet are respectively connected to the antifoaming agent storage tank and the nozzles through liquid guiding pipelines, and is used to suck the antifoaming agent in the antifoaming agent storage tank to the nozzles through the liquid guiding pipelines.

[0016] Preferably, there are multiple nozzles, and the multiple nozzles are arranged at intervals above the nitrification tank.

[0017] Preferably, both the physical defoaming structure and the chemical defoaming structure are signal-connected to the liquid level detection mechanism.

[0018] Preferably, it further includes a control module, and both the submersible liquid level gauge and the radar liquid level gauge are signal-connected to the control module;

[0019] The control module is used to control the opening of the physical defoaming structure and / or the chemical defoaming structure when the difference ΔH between H1 and H reaches a preset height value.

[0020] Preferably, a first valve is arranged on the liquid guiding pipeline between the defoaming pump and the nitrification tank, and a second valve is arranged on the liquid guiding pipeline between the defoaming pump and the spray head.

[0021] Preferably, pressure gauges are arranged on the liquid guiding pipeline between the defoaming pump and the first valve and on the liquid guiding pipeline between the defoaming pump and the second valve.

[0022] Preferably, a third valve is arranged on the liquid guiding pipeline between the antifoaming agent dosing pump and the antifoaming agent storage tank, and a fourth valve is arranged on the liquid guiding pipeline between the antifoaming agent dosing pump and the spray head.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The utility model has a simple structure and convenient operation. By directly arranging two kinds of composite liquid level gauges inside the nitrification tank and adopting the technical means of measuring the effective water depth and the height of the foam in the tank, the problem that the single liquid level gauge cannot accurately monitor the height of the foam in the tank is solved. At the same time, by adopting the combined defoaming technology of physical defoaming and chemical defoaming, the problem that the single physical defoaming effect is not good is avoided, and the problem that excessive addition of chemical agents in single chemical defoaming affects the growth of microorganisms and brings higher chemical agent costs is also avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objects and advantages of the present utility model will become more obvious:

[0026] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0027] As shown in the figure:

[0028] Nitrification tank 1 Defoaming agent dosing pump 3

[0029] Defoaming pump 2 Defoaming agent storage tank 4 DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present utility model will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present utility model, but do not limit the present utility model in any form. It should be noted that those of ordinary skill in the art can make several changes and improvements without departing from the concept of the present utility model. These all belong to the protection scope of the present utility model.

[0031] The present utility model discloses a defoaming device for a garbage leachate nitrification tank. Compared with the prior art in which only one liquid level gauge is used for liquid level detection and only physical spraying defoaming is adopted, this solution not only solves the problem that the single liquid level gauge cannot accurately monitor the height of the foam in the tank, but also solves the problems that the single physical defoaming effect is not good, excessive addition of chemical agents in single chemical defoaming affects the growth of microorganisms and brings higher chemical agent costs through combined defoaming.

[0032] According to the defoaming device for a garbage leachate nitrification tank provided by the present utility model, as Figure 1As shown in the figure, it includes a nitrification tank 1, an antifoaming structure, and a liquid level detection mechanism. The antifoaming structure and the liquid level detection mechanism are both arranged in the nitrification tank 1. The antifoaming structure includes a physical antifoaming structure and a chemical antifoaming structure. The physical antifoaming structure is used to suck the leachate in the nitrification tank 1 and spray the foam in the nitrification tank 1. The chemical antifoaming structure is used to add antifoaming agent to the foam in the nitrification tank 1. By adopting the combined antifoaming scheme of physical antifoaming and chemical antifoaming, the problem of poor effect of single physical antifoaming is solved, and at the same time, the problem of high cost of single chemical antifoaming can be avoided.

[0033] The liquid level detection mechanism includes a submersible level gauge and a radar level gauge. The submersible level gauge is used to monitor the water level height H1 in the tank, and the radar level gauge is used to monitor the water level and the total height H of the foam in the tank. By using two types of level gauges to monitor the water level height in the tank and the water level and the total height of the foam in the tank respectively, and separating the measurement of the two physical quantities, the accuracy of height measurement can be effectively improved.

[0034] Specifically, the physical antifoaming structure includes a nozzle, which is arranged above the nitrification tank 1 and is used to spray the foam in the nitrification tank 1. An antifoaming pump 2, whose inlet and outlet are respectively connected to the internal space of the nitrification tank 1 and the nozzle through a liquid guide pipe, is used to suck the leachate in the nitrification tank 1 to the nozzle through the liquid guide pipe. The chemical antifoaming structure includes: an antifoaming agent storage tank 4, which is used to store the antifoaming agent; an antifoaming agent dosing pump 3, whose inlet and outlet are respectively connected to the antifoaming agent storage tank 4 and the nozzle through a liquid guide pipe, is used to suck the antifoaming agent in the antifoaming agent storage tank 4 to the nozzle through the liquid guide pipe. There are multiple nozzles, and the multiple nozzles are arranged at intervals above the nitrification tank 1.

[0035] Embodiment 1

[0036] In this embodiment, the garbage leachate nitrification tank antifoaming device further includes a control module. The physical antifoaming structure and the chemical antifoaming structure are both signal-connected to the liquid level detection mechanism. The submersible level gauge and the radar level gauge are both signal-connected to the control module. The control module is used to control the physical antifoaming structure to start when the difference ΔH between H1 and H reaches the first height value, and control the chemical antifoaming structure to start when ΔH reaches the second height value.

[0037] Specifically, the working principle is as follows:

[0038] Step 1: The water level height H1 in the nitrification tank 1 is monitored in real time and online by the submersible level gauge.

[0039] Step 2: The total height H of the foam and the water level in the nitrification tank 1 is monitored in real time and online by the radar level gauge. The difference between the monitoring data of the two level gauges is the foam height ΔH in the tank.

[0040] Step 3: The foam height in the nitrification tank 1 is interlocked with the antifoaming pump 2, and the antifoaming pump 2 starts and stops automatically according to the foam height.

[0041] Step 4: When the defoaming effect of the defoaming pump 2 is not good and the foam height ΔH continues to increase without decreasing, the control module controls the defoaming agent dosing pump 3 to start and initiate chemical defoaming.

[0042] In this embodiment, the foam height in the tank is monitored by using a composite level gauge, the water level height H1 in the tank is monitored by a submersible level gauge, and the total water level and foam height H in the tank are monitored by a radar level gauge. The difference in the measured heights of the two level gauges, ΔH, is the foam height in the tank. An intelligent defoaming device is set up to automatically start or stop according to the foam height. The intelligent defoaming device mainly includes a physical defoaming device and a chemical agent automatic dosing defoaming device, which realizes the intelligent control of the foam height in the tank and avoids environmental protection accidents caused by foam overflow in the tank. Through the online interlock between the level gauge and the defoaming pump, the defoaming accuracy is high, and the problems of inaccurate manual defoaming and high labor intensity are solved. Through the combination of physical defoaming and chemical defoaming, the defoaming in the nitrification tank is made intelligent, the accuracy of chemical agent dosing is realized, and the risk of foam overflow in the tank and environmental protection accidents is solved.

[0043] A first valve is provided on the liquid guiding pipeline between the defoaming pump 2 and the nitrification tank 1, and a second valve is provided on the liquid guiding pipeline between the defoaming pump 2 and the spray head. Pressure gauges are provided on the liquid guiding pipeline between the defoaming pump 2 and the first valve and on the liquid guiding pipeline between the defoaming pump 2 and the second valve. A third valve is provided on the liquid guiding pipeline between the defoaming agent dosing pump 3 and the defoaming agent storage tank 4, and a fourth valve is provided on the liquid guiding pipeline between the defoaming agent dosing pump 3 and the spray head.

[0044] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present application.

[0045] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. Without conflict, the embodiments and features in the embodiments of the present application can be arbitrarily combined with each other.

Claims

1. A defoaming device for a landfill leachate nitrification tank, characterized in that: It comprises a nitrification tank (1), a defoaming structure and a liquid level detection mechanism, wherein the defoaming structure and the liquid level detection mechanism are both arranged in the nitrification tank (1); The defoaming structure comprises a physical defoaming structure and a chemical defoaming structure, wherein the physical defoaming structure is used to suck the filtrate in the nitrification tank (1) and spray the foam in the nitrification tank (1), and the chemical defoaming structure is used to add a defoaming agent to the foam in the nitrification tank (1); The liquid level detection mechanism includes a submersible liquid level meter and a radar liquid level meter. The submersible liquid level meter is used to monitor the water level height H1 in the pool, and the radar liquid level meter is used to monitor the water level and the total height H of the foam in the pool.

2. The defoaming device for the landfill leachate nitrification tank according to claim 1, characterized in that: The physical defoaming structure comprises: A nozzle is arranged above the nitrification pool (1) and is used to spray the foam in the nitrification pool (1); The defoaming pump (2) has an inlet and an outlet connected to the internal space of the nitrification tank (1) and the nozzle through a liquid-conducting pipe, and is used to pump the leachate in the nitrification tank (1) to the nozzle through the liquid-conducting pipe.

3. The defoaming device for the landfill leachate nitrification tank according to claim 2, characterized in that: The chemical defoaming structure comprises: A defoaming agent storage tank (4), used for storing the defoaming agent; The defoamer dosing pump (3) has an inlet and an outlet connected to the defoamer storage tank (4) and the nozzle through a liquid guide pipe, and is used to pump the defoamer in the defoamer storage tank (4) to the nozzle through the liquid guide pipe.

4. The defoaming device for the landfill leachate nitrification tank according to claim 2, characterized in that: There are a plurality of nozzles, and the plurality of nozzles are arranged above the nitrification tank (1) at intervals.

5. The defoaming device for the landfill leachate nitrification tank according to claim 1, characterized in that: The physical defoaming structure and the chemical defoaming structure are both connected to the liquid level detection mechanism signal.

6. The defoaming device for the landfill leachate nitrification tank according to claim 5, characterized in that: It also includes a control module, and the immersion level meter and the radar level meter are both connected to the control module signal; The control module is used to control the physical defoaming structure and / or the chemical defoaming structure to open when the difference ΔH between H1 and H reaches a preset height value.

7. The defoaming device for the landfill leachate nitrification tank according to claim 2, characterized in that: A first valve is provided on the liquid-conducting pipeline between the defoaming pump (2) and the nitrification tank (1), and a second valve is provided on the liquid-conducting pipeline between the defoaming pump (2) and the nozzle.

8. The defoaming device for the landfill leachate nitrification tank according to claim 7, characterized in that: Pressure gauges are provided on the liquid-conducting pipeline between the defoaming pump (2) and the first valve, and on the liquid-conducting pipeline between the defoaming pump (2) and the second valve.

9. The defoaming device for the landfill leachate nitrification tank according to claim 3, characterized in that: A third valve is provided on the liquid-conducting pipeline between the defoaming agent dosing pump (3) and the defoaming agent storage tank (4), and a fourth valve is provided on the liquid-conducting pipeline between the defoaming agent dosing pump (3) and the spray head.

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