An automatic carbon source dosing system

Abstract

The utility model relates to an automatic carbon source adding system, including denitrification filter tank, liquid inlet detection unit and liquid outlet detection unit, denitrification filter tank has liquid inlet pipe and liquid outlet pipe, liquid inlet detection unit includes the flowmeter of installing on liquid inlet pipe, liquid inlet nitrate nitrogen sensor and liquid inlet total nitrogen sensor, flowmeter is used for detecting the liquid inlet flow value of liquid flowing through liquid inlet pipe, liquid inlet nitrate nitrogen sensor is used for detecting the liquid inlet nitrate nitrogen value of liquid flowing through liquid inlet pipe, liquid inlet total nitrogen sensor is used for detecting the liquid inlet total nitrogen value of liquid flowing through liquid inlet pipe, liquid outlet detection unit includes the liquid outlet nitrate nitrogen sensor of installing on liquid outlet pipe, and the liquid outlet nitrate nitrogen sensor is used for detecting the liquid outlet nitrate nitrogen value of liquid flowing through liquid outlet pipe, the present application can overcome the lagging fluctuation of single feedforward through flowmeter, liquid inlet nitrate nitrogen sensor, liquid inlet total nitrogen sensor and liquid outlet nitrate nitrogen sensor, establishes feedforward and feedback.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an automatic carbon source dosing system. Background Technology

[0002] The purpose of adding carbon sources to wastewater is to supplement organic matter (carbon source) as an electron donor during the process of biological denitrification, in which denitrifying bacteria need to convert nitrate into nitrogen under anaerobic conditions. This provides the necessary nutrients and energy for the microorganisms to support the key denitrification reaction in the denitrification process.

[0003] Traditional carbon source dosing systems primarily rely on simple adjustments based on the influent and effluent mass (nitrate nitrogen), neglecting variations in influent flow rate and mass (total nitrogen). This often results in significant lag and fluctuations in adjustments. Furthermore, the lack of monitoring of the treated fluid after carbon source dosing (e.g., effluent total nitrogen, effluent COD) frequently leads to overdosing and waste. Utility Model Content

[0004] Based on the above description, this utility model provides an automatic carbon source dosing system, which aims to solve the problem that existing carbon source dosing systems cannot reflect the actual denitrification efficiency based solely on the quality of the effluent, and are prone to overdosing of carbon sources.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] An automatic carbon source dosing system includes:

[0007] The denitrification filter has an inlet pipe and an outlet pipe;

[0008] The liquid inlet detection unit includes a flow meter, a liquid inlet nitrate nitrogen sensor, and a liquid inlet total nitrogen sensor installed on the liquid inlet pipe. The flow meter is used to detect the liquid inlet flow rate of the liquid flowing through the liquid inlet pipe. The liquid inlet nitrate nitrogen sensor is used to detect the liquid inlet nitrate nitrogen value of the liquid flowing through the liquid inlet pipe. The liquid inlet total nitrogen sensor is used to detect the liquid inlet total nitrogen value of the liquid flowing through the liquid inlet pipe.

[0009] The liquid discharge detection unit includes a liquid discharge nitrate nitrogen sensor installed on the liquid discharge pipe, which is used to detect the liquid discharge nitrate nitrogen value of the liquid flowing through the liquid discharge pipe.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the liquid discharge detection unit includes a liquid discharge COD sensor installed on the liquid discharge pipe, which is used to detect the liquid discharge COD value of the liquid flowing through the liquid discharge pipe.

[0012] Furthermore, the liquid discharge detection unit includes a liquid discharge total nitrogen sensor installed on the liquid discharge total nitrogen sensor, which is used to detect the liquid discharge total nitrogen value of the liquid flowing through the liquid discharge pipe.

[0013] Furthermore, it includes a dosing pump, the outlet of which is connected to the denitrification filter via a pipeline.

[0014] Furthermore, the system includes a dosing control cabinet, wherein the output terminals of the flow meter, the inlet nitrate nitrogen sensor, the inlet total nitrogen sensor, the outlet nitrate nitrogen sensor, the outlet COD sensor, and the outlet total nitrogen sensor are electrically connected one-to-one to multiple feedback terminals of the dosing control cabinet, and the controlled terminal of the dosing pump is electrically connected to the control terminal of the dosing control cabinet.

[0015] Furthermore, it includes a server and a mobile device, wherein the server is communicatively connected to the dosing control cabinet, and the mobile device is communicatively connected to the server.

[0016] Furthermore, it includes a display that is communicatively connected to the server.

[0017] Furthermore, the denitrification filter is equipped with a fixed-bed biofilm packing material.

[0018] Furthermore, the inner wall of the denitrification filter is coated with a polytetrafluoroethylene coating.

[0019] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0020] (1) This application establishes feedforward and feedback by using a flow meter, an inlet nitrate nitrogen sensor, an inlet total nitrogen sensor and an outlet nitrate nitrogen sensor, which can overcome the hysteresis fluctuation of a single feedforward.

[0021] (2) This application detects the COD value of the effluent when it is effluent using an effluent COD sensor, which can prevent excessive addition that could lead to an excessive COD value in the effluent. This not only reduces the load on subsequent treatments but also prevents excessive addition of carbon sources.

[0022] (3) This application verifies the completeness of the denitrification of the system by detecting the total nitrogen removal rate of the liquid at the time of discharge using a total nitrogen sensor, and ensures that the emission standards are met. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of an automatic carbon source dosing system provided in an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Denitrification filter; 11. Inlet pipe; 12. Outlet pipe;

[0027] 2. Liquid inlet detection unit; 21. Flow meter; 22. Liquid inlet nitrate nitrogen sensor; 23. Liquid inlet total nitrogen sensor;

[0028] 3. Outflow detection unit; 31. Outflow nitrate nitrogen sensor; 32. Outflow COD sensor; 33. Outflow total nitrogen sensor;

[0029] 4. Dosing pump;

[0030] 5. Add control cabinet;

[0031] 6. Server;

[0032] 7. Mobile devices;

[0033] 8. Monitor. Detailed Implementation

[0034] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0036] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0037] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0038] Reference Figure 1 As shown, this utility model provides a technical solution: an automatic carbon source dosing system, including a denitrification filter 1, an influent detection unit 2, and an effluent detection unit 3; the denitrification filter 1 has an influent pipe 11 and an effluent pipe 12; the influent detection unit 2 includes a flow meter 21, an influent nitrate nitrogen sensor 22, and an influent total nitrogen sensor 23 installed on the influent pipe 11, the flow meter 21 is used to detect the influent flow rate of the liquid flowing through the influent pipe 11, the influent nitrate nitrogen sensor 22 is used to detect the influent nitrate nitrogen value of the liquid flowing through the influent pipe 11, and the influent total nitrogen sensor is used to detect the influent total nitrogen value of the liquid flowing through the influent pipe 11; the effluent detection unit 3 includes an effluent nitrate nitrogen sensor 31 installed on the effluent pipe 12, the effluent nitrate nitrogen sensor 31 is used to detect the effluent nitrate nitrogen value of the liquid flowing through the effluent pipe 12.

[0039] In this embodiment, when the inlet pipe 11 supplies liquid to the denitrification filter 1, the inlet detection unit 2 detects the inlet flow rate, inlet nitrate nitrogen value, and inlet total nitrogen value of the liquid flowing through the inlet pipe. Biodegradable nitrogen can then be calculated based on these values. When the denitrification filter 1 supplies liquid to the outlet pipe 12, the outlet nitrate nitrogen sensor 31 detects the outlet nitrate nitrogen value of the liquid flowing through the outlet pipe 12. The outlet nitrate nitrogen value directly reflects the denitrification effect. By establishing feedforward and feedback mechanisms, the hysteresis fluctuations of a single feedforward can be overcome. Furthermore, the amount of organic nitrogen requiring additional removal is quantified using biodegradable nitrogen, avoiding secondary pollution caused by the ammonification process.

[0040] Reference Figure 1 As shown, in some embodiments, the liquid discharge detection unit 3 includes a liquid discharge COD sensor 32 installed on the liquid discharge pipe 12. The liquid discharge COD sensor 32 is used to detect the liquid discharge COD value of the liquid flowing through the liquid discharge pipe 12.

[0041] In this embodiment, the effluent COD sensor 32 detects the effluent COD value to determine whether there is residual carbon source in the liquid flowing through the effluent pipe 12. When the effluent COD value exceeds a preset COD threshold, it is determined that the carbon source has been added excessively. By detecting the effluent COD value at the time of effluent discharge, excessive addition that leads to an excessive effluent COD value can be prevented, thus reducing the load on subsequent processing.

[0042] Reference Figure 1 As shown, in some embodiments, the liquid discharge detection unit 3 includes a liquid discharge total nitrogen sensor 33 installed on the liquid discharge, which is used to detect the liquid discharge total nitrogen value of the liquid flowing through the liquid discharge pipe 12.

[0043] In this embodiment, the effluent total nitrogen sensor 33 is linked with the influent total nitrogen sensor 23 to calculate the total nitrogen removal rate based on the effluent total nitrogen value and the influent total nitrogen value. The thoroughness of the system's denitrification is verified by detecting the total nitrogen removal rate at the effluent, ensuring compliance with emission standards.

[0044] The formula for calculating the total nitrogen removal rate is: η =×100%

[0045] In the formula: η Total nitrogen removal rate;

[0046] TN 1 represents the total nitrogen value of the influent;

[0047] TN 2 represents the total nitrogen value of the effluent.

[0048] Reference Figure 1 As shown, in some embodiments, the automatic carbon source dosing system includes a dosing pump 4, the outlet of which is connected to the denitrification filter 1 via a pipeline.

[0049] In this embodiment, after receiving and analyzing all the data fed back from the sensors, chemicals are added to the denitrification filter 1 via the dosing pump 4.

[0050] Reference Figure 1 As shown, in some embodiments, the automatic carbon source dosing system includes a dosing control cabinet 5. The output terminals of the flow meter 21, the inlet nitrate nitrogen sensor 22, the inlet total nitrogen sensor 23, the outlet nitrate nitrogen sensor 31, the outlet COD sensor 32, and the outlet total nitrogen sensor 33 are electrically connected to multiple feedback terminals of the dosing control cabinet 5 in a one-to-one correspondence. The controlled terminal of the dosing pump 4 is electrically connected to the control terminal of the dosing control cabinet 5.

[0051] For example, the dosing control cabinet 5 is a cabinet with an integrated controller. The controller can receive feedback signals from the flow meter 21, the inlet nitrate nitrogen sensor 22, the inlet total nitrogen sensor 23, the outlet nitrate nitrogen sensor 31, the outlet COD sensor 32, and the outlet total nitrogen sensor 33, and send control signals to the dosing pump 4.

[0052] In this embodiment, the dosing control cabinet 5 can receive and analyze data from all sensors and send control signals to the dosing pump 4, thereby realizing automatic dosing and controlling the dosing amount.

[0053] Reference Figure 1 As shown, in some embodiments, the automatic carbon source dosing system includes a server 6 and a mobile device 7. The server 6 is communicatively connected to the dosing control cabinet 5, and the mobile device 7 is communicatively connected to the server 6.

[0054] For example, the mobile device 7 can be a computer or a mobile phone, etc.

[0055] In this embodiment, the server 6 enables communication between the control cabinet 5 and the mobile device 7, allowing the control cabinet 5 to send alarm information to the mobile device 7. This enables remote monitoring and fault diagnosis, thereby improving the speed of operation and maintenance response.

[0056] Reference Figure 1 As shown, in some embodiments, the automatic carbon source dosing system includes a display 8, which is communicatively connected to a server 6.

[0057] In this embodiment, the server 6 enables communication between the dosing control cabinet 5 and the display 8, allowing the dosing control cabinet 5 to send operating data to the mobile device 7 and the display 8 to display the data curve in real time.

[0058] In some embodiments, the denitrification filter 1 is provided with a fixed bed biofilm packing.

[0059] For example, the fixed-bed biofilm packing material can be a porous polyethylene carrier, etc.

[0060] In this embodiment, the fixed-bed biofilm packing material can increase the amount of microbial attachment and enhance biofilm stability, thereby improving the denitrification rate.

[0061] In some embodiments, the inner wall of the denitrification filter 1 is coated with a polytetrafluoroethylene coating.

[0062] In this embodiment, the polytetrafluoroethylene coating can prevent microbial adhesion and scaling, thereby reducing rinsing time.

[0063] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An automatic carbon source dosing system, characterized in that, include: The denitrification filter (1) has an inlet pipe (11) and an outlet pipe (12). The liquid inlet detection unit (2) includes a flow meter (21), a liquid inlet nitrate nitrogen sensor (22), and a liquid inlet total nitrogen sensor (23) installed on the liquid inlet pipe (11). The flow meter (21) is used to detect the liquid inlet flow rate of the liquid flowing through the liquid inlet pipe (11). The liquid inlet nitrate nitrogen sensor (22) is used to detect the liquid inlet nitrate nitrogen value of the liquid flowing through the liquid inlet pipe (11). The liquid inlet total nitrogen sensor is used to detect the liquid inlet total nitrogen value of the liquid flowing through the liquid inlet pipe (11). The liquid discharge detection unit (3) includes a liquid discharge nitrate nitrogen sensor (31) installed on the liquid discharge pipe (12), which is used to detect the liquid discharge nitrate nitrogen value of the liquid flowing through the liquid discharge pipe (12).

2. The automatic carbon source dosing system according to claim 1, characterized in that, The liquid discharge detection unit (3) includes a liquid discharge COD sensor (32) installed on the liquid discharge pipe (12), which is used to detect the liquid discharge COD value of the liquid flowing through the liquid discharge pipe (12).

3. The automatic carbon source dosing system according to claim 2, characterized in that, The liquid discharge detection unit (3) includes a liquid discharge total nitrogen sensor (33) installed on the liquid discharge, which is used to detect the liquid discharge total nitrogen value of the liquid flowing through the liquid discharge pipe (12).

4. The automatic carbon source dosing system according to claim 3, characterized in that, It includes a dosing pump (4), the outlet of which is connected to the denitrification filter (1) via a pipeline.

5. The automatic carbon source dosing system according to claim 4, characterized in that, The dosing control cabinet (5) includes the output terminals of the flow meter (21), the inlet nitrate nitrogen sensor (22), the inlet total nitrogen sensor (23), the outlet nitrate nitrogen sensor (31), the outlet COD sensor (32), and the outlet total nitrogen sensor (33), which are electrically connected to multiple feedback terminals of the dosing control cabinet (5) in a one-to-one correspondence. The controlled terminal of the dosing pump (4) is electrically connected to the control terminal of the dosing control cabinet (5).

6. The automatic carbon source dosing system according to claim 5, characterized in that, It includes a server (6) and a mobile device (7), wherein the server (6) is communicatively connected to the dosing control cabinet (5), and the mobile device (7) is communicatively connected to the server (6).

7. The automatic carbon source dosing system according to claim 6, characterized in that, Includes a display (8), which is communicatively connected to the server (6).

8. The automatic carbon source dosing system according to any one of claims 1 to 7, characterized in that, The denitrification filter (1) is equipped with a fixed bed biofilm packing.

9. The automatic carbon source dosing system according to any one of claims 1 to 7, characterized in that, The inner wall of the denitrification filter (1) is coated with polytetrafluoroethylene.

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