Carbon source automatic feeding system

Abstract

A kind of carbon source automatic feeding system, including from upstream to downstream sequentially communicated primary sedimentation tank, anaerobic tank, aerobic tank and secondary sedimentation tank, it is characterized by: still including control module, carbon addition system and heating system;The control module is connected with dosing metering pump, the dosing metering pump is added carbon source to anaerobic tank by dosing pipeline;The heating system includes the heating pipeline (3) arranged in anaerobic tank, and the aeration pipeline (5) arranged in the aerobic tank, wherein the front end of heating pipeline (3) is connected with gas supply pipe, the inlet of this gas supply pipe is equipped with air inlet fan (1a), and heating device (1b) is arranged on gas supply pipe;The rear end of heating pipeline (3) is connected with aeration pipeline (5) by connecting pipe (4).Effect: the precise control of biological pool reaction temperature is realized, and carbon source is automatically and precisely fed.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an automatic carbon source dispensing system. Background Technology

[0002] The existing carbon source metering pump and carbon source dosing control cabinet only operate at industrial frequency, and the carbon source dosing flow rate is manually adjusted on the metering pump. Because the wastewater inflow varies greatly at different times, the carbon source dosing amount cannot be precisely controlled. Even with 100% guaranteed effluent quality, there is a high probability of overdosing when the inflow is small. Manual adjustment of the dosing amount results in frequent manual operation, high workload, and high carbon source energy consumption.

[0003] In addition, the reaction efficiency of carbon sources in wastewater treatment systems is greatly affected by ambient temperature. Existing biological tank designs make it difficult to achieve precise control of the reaction temperature in the biological tank, which in turn affects the wastewater treatment efficiency. Summary of the Invention

[0004] This utility model provides an automatic carbon source dispensing system that enables automatic and precise dispensing of carbon sources and precise control of the reaction temperature in the biological pool.

[0005] To achieve the above objectives, this utility model provides an automatic carbon source dispensing system, comprising a primary sedimentation tank, an anaerobic tank, an aerobic tank, and a secondary sedimentation tank connected sequentially from upstream to downstream. Its key features are: It also includes a control module, a carbonization system, and a heating system; The control module is connected to a dosing metering pump, which adds carbon source to the anaerobic tank through a dosing pipeline. The heating system includes heating pipes arranged in the anaerobic tank and aeration pipes arranged in the aerobic tank. The front end of the heating pipe is connected to an air supply pipe, an air supply fan is installed at the inlet of the air supply pipe, and a heating device is arranged on the air supply pipe. The rear end of the heating pipe is connected to the aeration pipe via a connecting pipe.

[0006] Through the above design, the automatic and precise addition of carbon sources and accurate control of reaction temperature in the wastewater treatment system are achieved by designing a carbon addition system and a heating system.

[0007] Adding a carbon source to an anaerobic digester can promote microbial metabolism, generate biogas, and optimize sludge properties. Promoting Microbial Metabolism: Adding a carbon source to the anaerobic tank provides essential energy and carbon for microorganisms, promoting their metabolic activities. Microorganisms utilize these organic substances for metabolism, producing useful gases such as methane, while simultaneously reducing the organic load and nutrient concentration in the wastewater.

[0008] Production of biogases: Under anaerobic conditions, microorganisms produce gases such as methane and carbon dioxide by decomposing organic matter. These gases can be recycled as clean energy, achieving resource recycling.

[0009] Optimize sludge properties: Adding an appropriate amount of carbon source can promote the reproduction and metabolic activities of aerobic microorganisms in sludge, improve sludge stability and dewatering performance, reduce sludge volume, and lower treatment costs.

[0010] Heating and aeration pipes are installed in the biological tank to precisely regulate the reaction temperature in the biological tank by delivering hot air through the corresponding pipes, thereby improving the quality and efficiency of wastewater treatment.

[0011] Preferably, the carbon addition system further includes a signal acquisition module assembly, which is connected to the control module via an A / D conversion module. The signal acquisition module assembly includes an influent flow meter, an online influent total nitrogen monitor, an online influent CODCr monitor, an online ammonia nitrogen and nitrate nitrogen meter, an effluent flow meter, and an online effluent total nitrogen monitor; The influent flow meter, influent total nitrogen online monitor, and influent CODCr online monitor are installed at the influent end of the primary sedimentation tank, the effluent flow meter and effluent total nitrogen online monitor are installed at the effluent end of the secondary sedimentation tank, and the online ammonia nitrogen and nitrate nitrogen meter are installed on the flow channel between the anaerobic tank and the aerobic tank.

[0012] The inlet flow meter and the online inlet total nitrogen monitor are used to collect inlet water flow and total nitrogen data, and the outlet flow meter and the online outlet total nitrogen monitor are used to collect outlet water flow and total nitrogen data.

[0013] Preferably, the control module includes an automatic carbon source dosing PLC control cabinet and a dosing calculation unit. The input of the dosing calculation unit is connected to a signal acquisition module via an A / D conversion module, and the output of the dosing calculation unit is connected to the automatic carbon source dosing PLC control cabinet. The automatic carbon source dosing PLC control cabinet is connected to the dosing metering pump.

[0014] The signal acquisition module effectively collects water flow and total nitrogen data from the inlet and outlet water ends. Then, the A / D conversion module converts the acquired analog signals into digital signals. The dosing calculation unit then calculates the required dosing amount based on the acquired signals. The automatic carbon source dosing PLC control cabinet controls the dosing pump to add carbon source according to the calculated dosing data. This achieves automatic and precise carbon source dosing, ensuring not only the quality of the treated effluent but also preventing carbon source waste and significantly reducing labor and material costs.

[0015] Preferably, the control module also controls the air intake fan and the heating device; A first temperature sensor is installed on the heating pipe, and the first temperature sensor is connected to the control module via an A / D conversion module.

[0016] The air intake fan and heating device work together to deliver hot air into the heating pipeline, thereby controlling the temperature in the anaerobic tank. The hot air then enters the aerobic tank through the heating pipeline, connecting pipe, and aeration pipeline, where it participates in the oxidation reaction and simultaneously increases the temperature in the anaerobic tank, thus achieving full utilization of energy.

[0017] Preferably, the connecting pipe is also connected to an auxiliary heating mechanism, the auxiliary heating mechanism is provided with an air supply pipe, an auxiliary air intake fan is installed at the inlet of the air supply pipe, the outlet of the air supply pipe is connected to the connecting pipe and close to the anaerobic tank, and an auxiliary heating device is arranged on the air supply pipe. The control module also controls the auxiliary air intake fan and the auxiliary heating device. A second temperature sensor is installed in the aerobic tank, and the second temperature sensor is connected to the control module via an A / D conversion module.

[0018] The auxiliary air intake fan and auxiliary heating device are used to precisely adjust the temperature inside the aerobic tank. When the temperature inside the aerobic tank is detected to be low, the auxiliary air intake fan and auxiliary heating device work together to supplement hot air into the aerobic tank; when the temperature inside the aerobic tank is detected to be high, the auxiliary air intake fan supplements cold air into the aerobic tank.

[0019] The first and second temperature sensors are used to acquire the temperature of the anaerobic and aerobic tanks in real time. The control module adjusts the operating status of the blower and heating device based on the collected temperature data, thereby achieving precise temperature regulation in the anaerobic and aerobic tanks.

[0020] Preferably, the heating pipe consists of an air inlet pipe, an S-shaped pipe, and an air outlet pipe connected in sequence. The air inlet pipe is close to the water inlet side of the anaerobic tank, and the air outlet pipe is close to the water outlet side of the anaerobic tank. The air inlet pipe and the air outlet pipe are perpendicular to the bottom of the anaerobic tank. The S-shaped pipe is laid in the middle of the anaerobic tank, and its height is equal to or lower than the halfway point between the overflow level and the bottom of the anaerobic tank, and is parallel to the bottom surface of the anaerobic tank.

[0021] The reaction zone of the anaerobic tank is mainly located in the middle of the anaerobic tank. By evenly laying S-shaped pipes in the middle of the anaerobic tank, the efficiency of biochemical reactions in the anaerobic tank can be controlled by controlling the temperature in the middle of the anaerobic tank.

[0022] Preferably, the aeration pipeline is provided with an air inlet pipe and an air outlet pipe. The air inlet pipe is located in the middle of the aerobic tank and is perpendicular to the bottom of the aerobic tank. The air outlet pipe is close to the bottom of the aerobic tank and is parallel to the bottom surface of the aerobic tank. The upper end of the air inlet pipe is connected to the outlet of the connecting pipe, and the lower end of the air inlet pipe is connected to N outlet pipes via an N-way connector. The N outlet pipes extend outwards towards the four walls of the aerobic tank in a divergent manner, and all outlet pipes are located on the same plane. Each outlet pipe has multiple outlet holes evenly arranged on it.

[0023] The air outlet pipes are evenly arranged at the bottom of the aerobic tank and output air evenly through multiple air holes, providing sufficient oxygen exchange and mixing for the biochemical reaction in the aerobic tank, ensuring that each part in the aerobic tank can react fully, and improving the quality and efficiency of water treatment.

[0024] Preferably, the connecting pipe is located directly above the anaerobic tank and the aerobic tank, and the height of the connecting pipe is higher than the liquid level in the anaerobic tank and the aerobic tank.

[0025] Preferably, a human-machine interaction module and a carbon source manual dosing control cabinet are also provided, wherein the human-machine interaction module is connected to the control module; and the carbon source manual dosing control cabinet is connected to the dosing metering pump.

[0026] The human-computer interaction module is used to set various system parameters and display the collected signals.

[0027] The manual carbon source dosing control cabinet is used to manually control the dosage when the automatic carbon source dosing PLC control cabinet malfunctions or cannot be used under other special circumstances, thereby improving the system's fault tolerance.

[0028] The beneficial effects of this invention are: it achieves precise temperature control within the biological treatment tank, improving the quality and efficiency of wastewater treatment; at the same time, it enables automatic and precise carbon source dispensing, ensuring not only the quality of the treated effluent but also avoiding the waste of carbon sources and greatly reducing labor and material costs. Attached Figure Description

[0029] Figure 1 This is a front view of the wastewater treatment system in the embodiment; Figure 2 This is a top view of the anaerobic tank in the embodiment; Figure 3 This is a top view of the aerobic tank in the embodiment; Figure 4 This is a block diagram of the working logic of the heating system in the embodiment; Figure 5 This is a block diagram of the working logic of the carbon addition system in the embodiment. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific examples. The following embodiments or drawings are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] like Figure 1 As shown, an automatic carbon source dispensing system includes a primary sedimentation tank, an anaerobic tank, an aerobic tank, and a secondary sedimentation tank connected sequentially from upstream to downstream, and also includes a control module, a carbon addition system, and a heating system. The control module is connected to a dosing metering pump, which adds carbon source to the anaerobic tank through a dosing pipeline. It also includes a human-machine interface module and a carbon source manual dosing control cabinet, with the human-machine interface module connected to the control module and the carbon source manual dosing control cabinet connected to the dosing metering pump.

[0032] The heating system includes a heating pipe 3 arranged in the anaerobic tank and an aeration pipe 5 arranged in the aerobic tank. The front end of the heating pipe 3 is connected to an air supply pipe, an air blower 1a is installed at the inlet of the air supply pipe, and a heating device 1b is arranged on the air supply pipe. The rear end of the heating pipe 3 is connected to the aeration pipe 5 via the connecting pipe 4.

[0033] The connecting pipe 4 is located directly above the anaerobic tank and the aerobic tank, and the height of the connecting pipe is higher than the liquid level in the anaerobic tank and the aerobic tank.

[0034] like Figure 5 As shown, the carbon addition system also includes a signal acquisition module assembly, which is connected to the control module via an A / D conversion module; The signal acquisition module assembly includes an influent flow meter, an online influent total nitrogen monitor, an online influent CODCr monitor, an online ammonia nitrogen and nitrate nitrogen meter, an effluent flow meter, and an online effluent total nitrogen monitor; The influent flow meter, influent total nitrogen online monitor, and influent CODCr online monitor are installed at the influent end of the primary sedimentation tank, the effluent flow meter and effluent total nitrogen online monitor are installed at the effluent end of the secondary sedimentation tank, and the online ammonia nitrogen and nitrate nitrogen meter are installed on the flow channel between the anaerobic tank and the aerobic tank.

[0035] The control module is equipped with a carbon source automatic dosing PLC control cabinet and a dosing calculation unit. The input terminal of the dosing calculation unit is connected to a signal acquisition module via an A / D conversion module, and the output terminal of the dosing calculation unit is connected to the carbon source automatic dosing PLC control cabinet. The carbon source automatic dosing PLC control cabinet is connected to the dosing metering pump.

[0036] like Figure 4 As shown, the control module also controls the air intake fan 1a and the heating device 1b; A first temperature sensor is installed on the heating pipe 3, and the first temperature sensor is connected to the control module via an A / D conversion module.

[0037] The connecting pipe 4 is also connected to an auxiliary heating mechanism. The auxiliary heating mechanism is provided with an air supply pipe. An auxiliary air intake fan 2a is installed at the inlet of the air supply pipe. The outlet of the air supply pipe is connected to the connecting pipe 4 and is close to the anaerobic tank. An auxiliary heating device 2b is arranged on the air supply pipe. The control module also controls the auxiliary air intake fan 2a and the auxiliary heating device 2b. A second temperature sensor is installed in the aerobic tank, and the second temperature sensor is connected to the control module via an A / D conversion module.

[0038] like Figure 2 As shown, the heating pipeline 3 consists of an air inlet pipe, an S-shaped pipe, and an air outlet pipe connected in sequence. The air inlet pipe is close to the water inlet side of the anaerobic tank, and the air outlet pipe is close to the water outlet side of the anaerobic tank. The air inlet pipe and the air outlet pipe are perpendicular to the bottom of the anaerobic tank. The S-shaped pipe is laid in the middle of the anaerobic tank, and its height is equal to or lower than the halfway point between the overflow level and the bottom of the anaerobic tank, and is parallel to the bottom surface of the anaerobic tank.

[0039] like Figure 3 As shown, the aeration pipeline 5 is equipped with an air inlet pipe and an air outlet pipe. The air inlet pipe is located in the middle of the aerobic tank and is perpendicular to the bottom of the aerobic tank. The air outlet pipe is close to the bottom of the aerobic tank and is parallel to the bottom surface of the aerobic tank. The upper end of the air inlet pipe is connected to the outlet of the connecting pipe 4, and the lower end of the air inlet pipe is connected to N outlet pipes via an N-connector. The N outlet pipes extend outwards towards the four walls of the aerobic tank in a divergent manner, and all outlet pipes are located on the same plane. Each outlet pipe has multiple outlet holes evenly arranged on it.

[0040] The heating and aeration pipelines are made of either fiberglass pipe, 304 stainless steel pipe, epoxy coal tar pitch anticorrosion steel pipe, or polyethylene (PE) anticorrosion steel pipe.

[0041] Fiberglass pipes, 304 stainless steel pipes, epoxy coal tar pitch anticorrosive steel pipes, and polyethylene (PE) anticorrosive steel pipes all have strong corrosion resistance and are suitable for highly corrosive environments such as biological ponds.

[0042] This embodiment collects influent and effluent flow rates and total nitrogen data parameters in real time. With the total nitrogen concentration in the effluent being 9 mg / L as the control baseline, the required dosage is calculated based on the fact that 6.4 kg / km³ of methanol is required to reduce 1 mg / L of total nitrogen. This achieves the goal of automatic and precise dosing of chemicals in real time according to water volume and quality.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic carbon source dispensing system, comprising a primary sedimentation tank, an anaerobic tank, an aerobic tank, and a secondary sedimentation tank connected sequentially from upstream to downstream, characterized in that: It also includes a control module, a carbonization system, and a heating system; The control module is connected to a dosing metering pump, which adds carbon source to the anaerobic tank through a dosing pipeline. The heating system includes a heating pipe (3) arranged in the anaerobic tank and an aeration pipe (5) arranged in the aerobic tank. The front end of the heating pipe (3) is connected to an air supply pipe, and an air supply fan (1a) is installed at the inlet of the air supply pipe. A heating device (1b) is arranged on the air supply pipe. The rear end of the heating pipe (3) is connected to the aeration pipe (5) via the connecting pipe (4); The air intake fan (1a) and heating device (1b) work together to deliver hot air into the heating pipe (3) and achieve temperature control in the anaerobic tank through the heating pipe (3); the hot air enters the aerobic tank through the heating pipe (3), connecting pipe (4) and aeration pipe (5) to participate in the oxidation reaction in the aerobic tank and at the same time increase the temperature in the anaerobic tank.

2. The automatic carbon source dispensing system according to claim 1, characterized in that: The carbon addition system also includes a signal acquisition module assembly, which is connected to the control module via an A / D conversion module; The signal acquisition module assembly includes an influent flow meter, an online influent total nitrogen monitor, an online influent CODCr monitor, an online ammonia nitrogen and nitrate nitrogen meter, an effluent flow meter, and an online effluent total nitrogen monitor; The influent flow meter, influent total nitrogen online monitor, and influent CODCr online monitor are installed at the influent end of the primary sedimentation tank, the effluent flow meter and effluent total nitrogen online monitor are installed at the effluent end of the secondary sedimentation tank, and the online ammonia nitrogen and nitrate nitrogen meter are installed on the flow channel between the anaerobic tank and the aerobic tank.

3. The automatic carbon source dispensing system according to claim 2, characterized in that: The control module is equipped with a carbon source automatic dosing PLC control cabinet and a dosing calculation unit. The input terminal of the dosing calculation unit is connected to a signal acquisition module via an A / D conversion module, and the output terminal of the dosing calculation unit is connected to the carbon source automatic dosing PLC control cabinet. The carbon source automatic dosing PLC control cabinet is connected to the dosing metering pump.

4. The automatic carbon source dispensing system according to claim 1, characterized in that: The control module also controls the air intake fan (1a) and the heating device (1b). A first temperature sensor is provided on the heating pipe (3), and the first temperature sensor is connected to the control module via an A / D conversion module.

5. The automatic carbon source dispensing system according to claim 1, characterized in that: The connecting pipe (4) is also connected to an auxiliary heating mechanism. The auxiliary heating mechanism is provided with an air supply pipe. An auxiliary air intake fan (2a) is installed at the inlet of the air supply pipe. The outlet of the air supply pipe is connected to the connecting pipe (4) and is close to the anaerobic tank. An auxiliary heating device (2b) is arranged on the air supply pipe. The control module also controls the auxiliary air intake fan (2a) and the auxiliary heating device (2b). A second temperature sensor is installed in the aerobic tank, and the second temperature sensor is connected to the control module via an A / D conversion module.

6. The automatic carbon source dispensing system according to claim 1, characterized in that: The heating pipeline (3) consists of an air inlet pipe, an S-shaped pipe and an air outlet pipe connected in sequence. The air inlet pipe is close to the water inlet side of the anaerobic tank, and the air outlet pipe is close to the water outlet side of the anaerobic tank. The air inlet pipe and the air outlet pipe are perpendicular to the bottom of the anaerobic tank. The S-shaped pipe is laid in the middle of the anaerobic tank, and its height is equal to or lower than the halfway point between the overflow level and the bottom of the anaerobic tank, and is parallel to the bottom surface of the anaerobic tank.

7. The automatic carbon source dispensing system according to claim 1, characterized in that: The aeration pipeline (5) is provided with an air inlet pipe and an air outlet pipe. The air inlet pipe is located in the middle of the aerobic tank and is perpendicular to the bottom of the aerobic tank. The air outlet pipe is close to the bottom of the aerobic tank and is parallel to the bottom surface of the aerobic tank. The upper end of the air inlet pipe is connected to the outlet of the connecting pipe (4), and the lower end of the air inlet pipe is connected to the N outlet pipes via the N-connector. The N outlet pipes extend outwards toward the four walls of the aerobic pool in a divergent manner, and all outlet pipes are located on the same plane. Each outlet pipe is evenly provided with multiple outlet holes.

8. The automatic carbon source dispensing system according to claim 1, characterized in that: The connecting pipe (4) is located directly above the anaerobic tank and the aerobic tank, and the height of the connecting pipe is higher than the liquid level of the anaerobic tank and the aerobic tank.

9. The automatic carbon source dispensing system according to claim 1, characterized in that: It also includes a human-machine interface module and a manual carbon source dosing control cabinet; The human-computer interaction module is connected to the control module; The manual carbon source dosing control cabinet is connected to the dosing metering pump.

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