Method and device for adjusting running state based on tail gas analysis of sewage biochemical system

Abstract

The invention discloses a method and a device for adjusting an operation state based on tail gas analysis of a sewage biochemical system, and the device comprises a reaction tank which is a sewage treatment biochemical reaction space; the sample collecting device is used for collecting gas in the reaction tank; the sample treatment device is used for pre-treating the gas collected by the sample collection device before analysis; the sample analysis device is used for quantitatively detecting the gas sample treated by the sample treatment device; the data analysis system is used for processing and restoring the data of the sample analysis device and converting the data into key data corresponding to water treatment; and the feedback adjustment system is used for adjusting the scheme according to the feedback of the data analysis system. The test environment is improved, the service life and the accuracy of an analysis instrument are improved, the analysis speed is high, the timeliness is minute level or even second level, and the running state of the system can be reflected in real time.

Description

Technical Field

[0001] The invention belongs to the field of biochemical sewage treatment, and in particular relates to a method and a device for adjusting the operating state based on tail gas analysis of a biochemical sewage system. Background Art

[0002] Entering the new century, industrial production technology has developed rapidly, from mechanization to automation, which has greatly saved labor costs, liberated a large number of laborers, and greatly improved production efficiency. In recent years, with the rapid development of communication technology, artificial intelligence, and big data, artificial intelligence technology has spread rapidly to all walks of life in society, and smart factories, smart medical care, and smart agriculture have flourished, greatly liberating the bound labor force.

[0003] In the sewage treatment industry, it is more difficult to achieve intelligent sewage treatment due to the complexity and variability of sewage sources. To realize the intelligent operation of sewage systems, it is more urgent and important to determine whether online data analysis and detection is faster and more accurate, whether it can truly reflect the system operation status and make timely feedback adjustments.

[0004] Traditional biochemical analysis of activated sludge and microorganisms is done by manual sampling, testing SV30, MLSS, SVI, COD, NH3-N, TN, TP, etc. Specialized analysts prepare samples and analyze the types and quantities of microorganisms under a microscope.

[0005] Existing online analysis systems for biochemical devices mostly analyze the operating status of the reaction system through water quality analysis. The main analysis and testing equipment requires sewage drainage and test probes in sewage. The online testing equipment is complex to install, costly, requires the use of chemical agents, and has a greater probability of failure. The test results are mostly local and easily affected by sludge in the water, and cannot better feedback the overall status of the system. At the same time, the operating environment is relatively harsh, the instrument life is short, the maintenance cost is high, the detection speed is slow, and the timeliness of the results is low.

[0006] Therefore, there is an urgent need for a new method and device that can achieve fast, accurate, efficient and convenient online analysis and feedback to adjust the operating status of the system to meet the future trend of intelligent development of sewage treatment. Summary of the invention

[0007] The present invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a method and device for adjusting the operating state based on tail gas analysis of a sewage biochemical system.

[0008] The present invention is achieved through the following technical solutions:

[0009] A method and device for adjusting the operating state based on tail gas analysis of a sewage biochemical system, comprising:

[0010] The reaction tank is a space for biochemical reactions in sewage treatment;

[0011] A sample collection device, which is used to collect gas in the reaction cell;

[0012] A sample processing device, which is used to pre-process the gas collected by the sample collection device before analysis;

[0013] A sample analysis device, which is used to perform quantitative detection on the gas sample processed by the sample processing device;

[0014] A data analysis system, which processes and restores the data of the sample analysis device and converts the data into key data corresponding to water treatment;

[0015] A feedback adjustment system is used to adjust the plan according to the feedback of the data analysis system.

[0016] In the above technical solution, the reaction pool is a closed space.

[0017] In the above technical solution, the gaseous byproducts produced by the biochemical reaction of sewage treatment in the reaction tank are accumulated in the space above the reaction tank.

[0018] In the above technical solution, the sample collection device is connected to the top of the reaction pool.

[0019] In the above technical solution, the sample collection device is a gas pipeline or a combination of a gas pipeline and a power device; one end of the gas pipeline is connected to the top of the reaction pool, and the other end is connected to the sample processing device; the power device is arranged on the gas pipeline; the material of the pipeline is any one of stainless steel, PVC or PP; the power device is an air pump, a fan or a combination of an air pump and a fan.

[0020] In the above technical solution, the sample processing device is any one or more combinations of a gas dryer, a gas molecular sieve filter or a filter filled with PP cotton;

[0021] In the above technical solution, the pretreatment includes enriching indicator substances, removing impurities and dehydrating.

[0022] In the above technical solution, the sample analysis device is any one of a gas chromatograph, a thermal conductivity gas analyzer, an electrochemical gas analyzer or an infrared absorption analyzer, and the sample inlet of the sample analysis device is connected to the outlet of the sample processing device through a gas pipeline.

[0023] In the above technical solution, the data analysis system is a computer equipped with data analysis software.

[0024] In the above technical solution, the key data include key process parameters, treatment effects and operating status data corresponding to water treatment.

[0025] In the above technical solution, the feedback adjustment system is electrically connected to the data analysis system, and the data results of the data analysis system are obtained through data transmission.

[0026] A method for using a device for adjusting the operating state based on tail gas analysis of a sewage biochemical system, wherein the tail gas of a reaction pool is transported to a sample processing device via a sample collection device above a reaction pool of the sewage treatment device, the sample processed by the sample processing device is input into a sample analysis device, the analysis data of the sample analysis device is input into a data analysis system via online transmission, the result of the data analysis system is input into a feedback control system via data transmission, and the feedback control system adjusts the process control conditions or gives corresponding treatment suggestions according to the result.

[0027] The beneficial effects of the present invention are:

[0028] The present invention provides a method and device for adjusting the operating state based on tail gas analysis of a sewage biochemical system, and realizes feedback and operation adjustment of the sewage treatment system state through online real-time tail gas detection, collection and analysis of sewage biochemical. The present invention can replace the traditional sewage online analysis system, and through online detection and collection of data on the types of gases produced by biochemical reactions and their concentration changes, and analysis, further feedback is given to the operation of the biochemical system, and optimization and adjustment are performed. The test and analysis environment of the present invention is greatly improved compared with the traditional test environment, and the service life and accuracy of the analysis instrument are greatly improved. At the same time, the analysis speed of the gas sample is faster, with a timeliness of minutes or even seconds, and the operating state of the system can be reflected in real time. Therefore, the method of the present invention greatly improves the reference value of the analysis result compared with the traditional analysis method. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention.

[0030] in:

[0031] 1. Reaction pool; 2. Sample collection; 3. Sample processing; 4. Sample analysis; 5. Data analysis; 6. Feedback adjustment system.

[0032] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0034] like Figure 1 As shown, a device for adjusting the operating state based on tail gas analysis of a sewage biochemical system comprises a reaction tank 1, a sample collection device 2, a sample processing device 3, a sample analysis device 4, a data analysis system 5 and a feedback adjustment system 6;

[0035] The reaction pool 1 is a confined space;

[0036] The sewage treatment biochemical reaction in the reaction tank 1 is an aerobic reaction, anoxic reaction or anaerobic reaction;

[0037] The reaction pool 1 is a sewage treatment device or a sewage treatment container, which is the main place or space for the biochemical reaction of sewage treatment; the reaction pool is selected from a sewage treatment reaction pool tank or a sewage treatment reaction pool tank;

[0038] The gaseous byproducts generated by the reaction in the reaction pool 1 are gathered in the space above the reaction pool 1, which is highly representative and can reflect the reaction conditions and effects in the reaction pool;

[0039] The sample collection device 2 is used to collect gas in the reaction pool 1; the sample collection device 2 is connected to the top of the reaction pool 1; a pump is arranged on the pipeline between the sample collection device 2 and the reaction pool 1;

[0040] The sample collection device 2 is a gas pipeline or a combination of a gas pipeline and a power device; one end of the gas pipeline is connected to the top of the reaction pool 1, and the other end is connected to the sample processing device 3; the power device is arranged on the gas pipeline; the material of the pipeline is any one of stainless steel, PVC or PP; the power device is an air pump, a fan or a combination of an air pump and a fan;

[0041] The gas collected by the sample collection device 2 includes the gas generated in the reaction pool 1, the gas consumed by the reaction pool 1, or the gas brought into the reaction pool 1 by aeration;

[0042] The gas collected by the sample collection device 2 is compressed gas or non-compressed gas. The appropriate sample collection device is selected according to actual needs and different reactions in the reaction pool 1.

[0043] The gas collected by the sample collection device 2 is any one or more of oxygen, nitrogen, carbon dioxide, carbon monoxide, hydrogen, methane, hydrogen sulfide, nitric oxide or nitrogen dioxide;

[0044] The sample processing device 3 is used to pre-process the gas collected by the sample collection device 2 before analysis, and to enrich the index substances, remove impurities, dehydrate and other processes for the gas with low content in the sample. After passing through the sample processing device 3, the gas meets the requirements of sample detection; impurity removal is to remove other interfering gases as needed, such as removing carbon dioxide from the gas;

[0045] The sample processing device 3 is any one or more combinations of a gas dryer, a gas molecular sieve filter or a filter filled with PP cotton, and different configuration combinations are selected according to actual needs;

[0046] The inlet and outlet ends of the sample processing device 3 are connected to the sample collection device 2 and the sample analysis device 4 respectively through gas pipelines; flow meters are provided on the gas pipelines at the inlet and outlet ends;

[0047] When the sample processing device 3 adopts a combination of multiple devices, adjacent devices are connected by gas pipelines, and a power device is set on the gas pipeline according to demand;

[0048] The sample analysis device 4 is used to perform quantitative detection on the gas sample processed by the sample processing device 3; the sample analysis device 4 can perform concentration analysis on oxygen, nitrogen, carbon dioxide, carbon monoxide, hydrogen, methane, nitric oxide, nitrogen dioxide, hydrogen sulfide, etc.;

[0049] The sample analysis device 4 is any one of a gas chromatograph, a thermal conductivity gas analyzer, an electrochemical gas analyzer or an infrared absorption analyzer, and the sample inlet of the sample analysis device 4 is connected to the outlet of the sample processing device 3 through a gas pipeline;

[0050] The data analysis system 5 is a computer equipped with data analysis software. The data analysis system 5 is used to process and restore the data of the sample analysis device 4 based on the principles and formulas in sewage treatment. By comprehensively processing and analyzing the sample analysis data, aeration data, especially the water quality data of the aerobic tank and the influent, the data is converted into key process parameters, treatment effects and operating status data corresponding to the water treatment, and the adjustment plan is given to the feedback adjustment system based on the above data;

[0051] The feedback adjustment system 6 is electrically connected to the data analysis system 5, obtains the data results of the data analysis system 5 through data transmission, and compares the data results with the conditions or control rules in the intelligent database to make adjustments to the process conditions or give corresponding processing suggestions.

[0052] The feedback adjustment system 6 is used to optimize the device according to the feedback adjustment plan of the data analysis system 5, so as to optimize the key operating control parameters of the reaction pool, such as adjusting the parameters such as aeration volume, treated water volume and dosage, so as to realize intelligent control of the biochemical system; the feedback adjustment system function makes key parameter adjustments to the biochemical system or continues to maintain control feedback according to the results of data analysis and restoration.

[0053] Example 2

[0054] A method for adjusting the operating state based on online analysis, detection and feedback of tail gas from a sewage biochemical system, specifically: above a reaction pool of a sewage treatment device, the reaction pool is connected to an air pump through a stainless steel gas pipeline, and when the air pump is started, the tail gas from the reaction pool is transported to a sample processing device, namely a gas dryer and a molecular sieve filter, through the stainless steel gas pipeline; the sample processed by the sample processing device is then input into a sample analysis device (a gas chromatograph in this embodiment) through a flow meter and a gas pipeline; the analysis results and flow rate data of the sample analysis device are transmitted online and input into a data analysis system; the results of the data analysis system are transmitted through data and input into a feedback control system; the feedback control system adjusts the process control conditions or gives corresponding treatment suggestions according to the results.

[0055] The method of the present invention replaces the traditional analysis of indicators such as COD, ammonia nitrogen, total nitrogen, sulfide, etc. in sewage by the concentration and type changes of the reaction pool gas, and replaces the test and analysis of solubility indicators in sewage with gas test analysis, thereby improving the instrument use environment, greatly increasing the service life, and greatly reducing maintenance; at the same time, the analysis speed of gas samples is 1 to 2 orders of magnitude faster than that of water samples, which greatly improves the timeliness of data and can better feedback the system operation status in real time.

[0056] The method of the present invention makes up for the shortcomings of short instrument life and poor timeliness of traditional testing and analysis methods of biochemical systems, and can better meet the development trend of intelligent sewage treatment.

[0057] Application Example 1

[0058] Carbon dioxide and oxygen sampling points are added above the confined space of the aerobic pool. The gas passes through the sampling device, sample processing device, and sample analysis device. The final tested dissolved oxygen concentration is 241 mg / L, and the carbon dioxide concentration is 53 mg / L. After analysis by the data processing system, it is restored to the sewage system state. The sewage COD degradation rate is 38.5 mg / L, and the oxygen utilization rate is 11.7%. Based on this, the effluent data can be given according to the inlet data.

[0059] Application Example 2

[0060] A sample collection device, a sample processing device, and a nitrogen analysis device are added above the closed space of the denitrification pool to analyze the change in nitrogen concentration. After processing in the data center, the denitrification effect can be determined. For example, if the nitrogen concentration in the denitrification pool is 40 mg / L after deducting the background value, the denitrification denitrification is 40 mg / L after data processing. At the same time, the fluctuation of concentration can also be fed back to the fluctuation of nitrate nitrogen in the water.

[0061] Principle of the present invention:

[0062] The sewage treatment process is mainly a process of oxidation and reduction of pollutants. The main indicator substances produced are carbon dioxide, hydrogen sulfide, hydrogen, methane, nitrogen and some derivatives of microbial metabolism.

[0063] The main manifestation of COD removal in biochemical sewage treatment is oxygen consumption and carbon dioxide production. The changes in the two are directly related to the effect of COD removal and the state of the biochemical system, and have a clear quantitative relationship. The utilization rate of dissolved oxygen in water and the change in gas concentration during nitrification are directly related to the state of the nitrification process, and there is a clear quantitative relationship. The changes in the concentration of carbon dioxide and nitrogen during denitrification are directly related to the denitrification process and have a clear quantitative relationship. The hydrolysis acidification and anaerobic processes are also directly related to their operating status based on the gases they produce. The operating status of the biochemical system is judged and quantified based on the changes in the concentration of gases produced and the presence or absence of gases that need to be utilized in the chemical reactions occurring in each process section.

[0064] The present invention collects data on exhaust gas and intake air by analyzing changes in gas concentration. The equipment is separated from the water environment, and the collection, processing and detection equipment of gas samples are simpler, faster, and have a long service life. The maintenance is simple and the maintenance cost is lower. Gas samples can provide more comprehensive feedback on system conditions than water samples. Moreover, gas sample data collection and analysis is faster, and the timeliness can be maintained at the second level. It is easy to realize real-time online analysis of the biochemical system, and can synchronously and directly reflect the current operating status of the biochemical system and provide feedback and adjustment to it to meet the application of intelligent scenarios.

[0065] The test and analysis environment of the present invention is greatly improved compared with the traditional test environment, greatly improving the service life and accuracy of the analytical instrument. At the same time, the analysis speed of the gas sample is faster, with a timeliness of minutes or even seconds, which can reflect the operating status of the system in real time, while the traditional analysis method is at the hour level, and there is a lag. Therefore, the method of the present invention greatly improves the reference value of the analysis result compared with the traditional analysis method. At the same time, the amount of data collected by the method of the present invention is larger than that of the traditional test and analysis method, which is more in line with the future development of intelligence, and it has the characteristics of long life, not easy to damage, strong data timeliness, etc., which meets the development trend of future sewage treatment system intelligence and has great application potential in the future.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0067] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0068] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. A method and device for adjusting the operating state based on tail gas analysis of a sewage biochemical system, characterized in that: include: A reaction tank (1), which is a space for biochemical reactions in sewage treatment; A sample collection device (2) for collecting gas in the reaction pool (1); A sample processing device (3) for pre-processing the gas collected by the sample collecting device (2) before analysis; A sample analysis device (4), used for quantitatively detecting the gas sample processed by the sample processing device (3); A data analysis system (5) processes and restores the data from the sample analysis device (4) and converts the data into key data corresponding to water treatment; A feedback adjustment system (6) is used to adjust the solution according to the feedback from the data analysis system (5).

2. The device for adjusting the operating state based on tail gas analysis of a sewage biochemical system according to claim 1, characterized in that: The reaction pool (1) is a closed space.

3. The device for adjusting the operating state based on tail gas analysis of a sewage biochemical system according to claim 1, characterized in that: The gaseous byproducts generated by the biochemical reaction of sewage treatment in the reaction tank (1) are accumulated in the space above the reaction tank (1).

4. The device for adjusting the operating state based on tail gas analysis of a sewage biochemical system according to claim 1, characterized in that: The sample collection device (2) is connected to the top of the reaction pool (1).

5. The device for adjusting the operating state based on tail gas analysis of a sewage biochemical system according to claim 1, characterized in that: The sample collection device (2) is a gas pipeline or a combination of a gas pipeline and a power device; one end of the gas pipeline is connected to the top of the reaction pool (1), and the other end is connected to the sample processing device (3); the power device is arranged on the gas pipeline; the material of the pipeline is any one of stainless steel, PVC or PP; the power device is an air pump, a fan or a combination of an air pump and a fan.

6. The device for adjusting the operating state based on tail gas analysis of a sewage biochemical system according to claim 1, characterized in that: The sample processing device (3) is any one or more combinations of a gas dryer, a gas molecular sieve filter or a filter filled with PP cotton.

7. The device for adjusting the operating state based on tail gas analysis of a sewage biochemical system according to claim 1, characterized in that: The sample analysis device (4) is any one of a gas chromatograph, a thermal conductivity gas analyzer, an electrochemical gas analyzer or an infrared absorption analyzer, and the sample inlet of the sample analysis device (4) is connected to the outlet of the sample processing device (3) through a gas pipeline.

8. The device for adjusting the operating state based on tail gas analysis of a sewage biochemical system according to claim 1, characterized in that: The data analysis system (5) is a computer equipped with data analysis software.

9. The device for adjusting the operating state based on tail gas analysis of a sewage biochemical system according to claim 1, characterized in that: The feedback adjustment system (6) is electrically connected to the data analysis system (5) and obtains data results of the data analysis system (5) through data transmission.

10. A method for using the device for adjusting the operating state based on tail gas analysis of a sewage biochemical system according to any one of claims 1 to 9, characterized in that: The tail gas of the reaction pool is transported to the sample processing device through the sample collection device above the reaction pool of the sewage treatment device. The sample processed by the sample processing device is input into the sample analysis device. The analysis data of the sample analysis device is transmitted online and input into the data analysis system. The result of the data analysis system is input into the feedback control system through data transmission. The feedback control system adjusts the process control conditions or gives corresponding treatment suggestions according to the result.

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