Biogas power generation desulfurization control system

Abstract

The utility model discloses a methane power generation desulfurization control system which comprises a methane power generation main body, an auxiliary material feeding device and a control device, and the methane power generation main body comprises a methane collecting device, a desulfurization device and a power generation device; the control device comprises a power meter, a biogas monitoring box and a controller, the power meter is electrically connected with the power generation device, the biogas monitoring box is located between the desulfurization device and the power generation device to detect biogas data, and the controller is electrically connected with the auxiliary material feeding device, the power meter and the biogas monitoring box. And the controller is used for controlling the feeding amount of the auxiliary material feeding device according to data collected by the power meter and data electrically collected by the biogas monitoring box. The controller adjusts the addition amount value of the auxiliary materials put into the desulfurization device by the auxiliary material putting device, so that the auxiliary material putting amount is accurately controlled, the system is kept in an ideal state, system faults and raw material consumption are reduced, and the power generation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of biogas power generation, in particular to a biogas power generation desulfurization control system. Background Art

[0002] The core of traditional biogas power generation is biogas desulfurization, in which biological desulfurization is easily affected by external factors, causing fluctuations in the desulfurization system. In the process of biological desulfurization, it is usually necessary to add organic carbon sources, trace elements, sulfuric acid and other auxiliary materials to promote the growth and activity of bacteria and achieve rapid desulfurization. However, slight changes in the amount of auxiliary materials can easily cause a strong reaction of bacteria, directly leading to poor desulfurization stability, thereby causing chain equipment failures or shutdowns due to excessive hydrogen sulfide, resulting in low power generation efficiency and waste of resources. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a biogas power generation desulfurization control system, which can accurately control the amount of auxiliary materials added to keep the system in an ideal state, reduce system failures and raw material consumption, and improve power generation efficiency.

[0004] According to an embodiment of the utility model, a biogas power generation and desulfurization control system comprises a biogas power generation body, an auxiliary material delivery device and a control device, wherein the biogas power generation body comprises a biogas collecting device, a desulfurization device and a power generation device, and the biogas collecting device, the desulfurization device and the power generation device are connected in sequence; the auxiliary material delivery device is connected to the biogas collecting device to deliver auxiliary materials to the biogas collecting device, and / or is connected to the desulfurization device to deliver auxiliary materials to the desulfurization device; the control device comprises a power meter, a biogas monitoring box and a controller, the power meter is electrically connected to the power generation device, the biogas monitoring box is located between the desulfurization device and the power generation device to detect biogas data, the controller is electrically connected to the auxiliary material delivery device, the power meter and the biogas monitoring box respectively, and the controller is used to control the delivery amount of the auxiliary material delivery device according to the data collected by the power meter and the data electrically collected by the biogas monitoring box.

[0005] According to a biogas power generation and desulfurization control system of the embodiment of the utility model, at least the following beneficial effects are achieved: by setting a control device, the controller of the control device can calculate the theoretical value of the auxiliary material addition required by the desulfurization device according to the generator power generated by the power meter; the controller can calculate the upper limit value of the auxiliary material addition according to the actual data of the biogas after desulfurization collected by the biogas monitoring box, and then by comparing the gas requirement data of the generator set preset by the power generation device. Based on the theoretical value and the upper limit value, the controller adjusts the amount of auxiliary material added by the auxiliary material delivery device to the desulfurization device, realizes precise control of the amount of auxiliary material delivery, keeps the system in an ideal state, reduces system failures and raw material consumption, and improves power generation efficiency.

[0006] According to some embodiments of the present utility model, the biogas monitoring box includes a gas flow meter, an electrochemical sensor and a humidity sensor, and the gas flow meter, the electrochemical sensor and the humidity sensor cooperate to detect the biogas data.

[0007] According to some embodiments of the utility model, the auxiliary material delivery device includes an electronically controlled pump, the electronically controlled pump is connected to the desulfurization device, the electronically controlled pump is connected to a liquid storage tank, and the liquid storage tank stores an acid-base regulator.

[0008] According to some embodiments of the present utility model, the desulfurization device is connected to a waste heat recovery device, and the waste heat recovery device is respectively connected to the biogas collection device and the desulfurization device through a steam pipe.

[0009] According to some embodiments of the utility model, a thermometer and an electric control valve are provided on the steam pipe, and the thermometer and the electric control valve are electrically connected to the controller respectively.

[0010] According to some embodiments of the utility model, a first flow meter is provided at the input end of the biogas collection device, and a second flow meter is provided at the output end of the desulfurization device, and the first flow meter and the second flow meter are electrically connected to the controller respectively.

[0011] According to some embodiments of the present utility model, the control device further includes an alarm, and the alarm is connected to the biogas monitoring box.

[0012] According to some embodiments of the present invention, the control device also includes a display, and the display is connected to the controller.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0015] Figure 1 This is a schematic diagram of the structure of a biogas power generation desulfurization control system according to an embodiment of the utility model;

[0016] Figure 2 This is a control principle diagram of a biogas power generation desulfurization control system according to an embodiment of the utility model;

[0017] Figure numerals: biogas power generation body 100; biogas collecting device 110; first flow meter 111; desulfurization device 120; second flow meter 121; power generation device 130; auxiliary material feeding device 200; electric control pump 210; liquid storage tank 220; control device 300; power meter 310; biogas monitoring box 320; controller 330; waste heat recovery device 400; steam pipe 410; thermometer 411; electric control valve 412. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention.

[0020] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0022] Reference Figure 1 and Figure 2 As shown, a biogas power generation and desulfurization control system according to an embodiment of the utility model comprises a biogas power generation body 100 , an auxiliary material delivery device 200 and a control device 300 .

[0023] The biogas power generation body 100 includes a biogas collection device 110, a desulfurization device 120 and a power generation device 130, which are connected in sequence. The biogas collection device 110 is mainly composed of a biogas fermentation tank, a grit chamber and a biogas storage device, and the biogas storage device includes a plurality of biogas tanks or gas bags. The biogas fermentation tank can store organic waste and ferment to produce biogas, and the grit chamber transmits the biogas to the biogas storage device through a pipeline valve to temporarily store the collected biogas.

[0024] The desulfurization device 120 is mainly composed of a biological scrubber, a bioreactor, a sulfur separator and other equipment. The biogas containing hydrogen sulfide enters the biological scrubber from the biogas collection device 110, and the hydrogen sulfide is removed from the biogas after biological degradation and chemical absorption in the tower. Then the biological scrubbing liquid enters the bioreactor to convert the sulfide (sulfate, etc.) in the bioreactor into elemental sulfur, and the reaction liquid is regenerated and reused. The desulfurization device 120 can directly send the pure biogas after desulfurization to the power generation equipment for power generation.

[0025] The power generation device 130 is provided with linkage equipment (ie monitoring and control equipment), which is used to monitor and control the operation of the entire biogas desulfurization power generation system.

[0026] Reference Figure 1 As shown, it can be understood that auxiliary materials such as activated carbon, activated iron oxide, metal oxides, and alkaline substances are usually used in the biological desulfurization process: activated carbon can adsorb sulfides such as hydrogen sulfide in biogas, activated iron oxide acts as a catalyst to help oxidize hydrogen sulfide, and metal oxides such as iron oxide and copper oxide can be used to oxidize hydrogen sulfide. Alkaline substances such as sodium hydroxide and potassium hydroxide can be used to neutralize sulfuric acid generated by hydrogen sulfide. The auxiliary material delivery device 200 is connected to the biogas collection device 110 to deliver auxiliary materials to the biogas collection device 110, and / or is connected to the desulfurization device 120 to deliver auxiliary materials. Different auxiliary materials have different action positions. Specifically, the auxiliary material delivery device 200 includes an activated carbon delivery device, an activated iron oxide delivery device, and a metal oxide delivery device, etc. Such delivery devices are usually connected to the biogas collection device 110 and the fermentation tank, so that auxiliary materials such as activated carbon, activated iron oxide, and metal oxides absorb and oxidize impurities such as hydrogen sulfide in the biogas.

[0027] Alkaline substances such as sodium hydroxide usually need to be connected to the bioreactor in the desulfurization device 120 to adjust the acid-base balance of the reaction liquid. Specifically, the auxiliary material feeding device 200 includes a corrosion-resistant electrically controlled pump 210, which is connected to the desulfurization device 120. The electrically controlled pump 210 is connected to a liquid storage tank 220, which stores an acid-base regulator. Since hydrogen sulfide will react with the microorganisms in the bioreactor to generate sulfuric acid, the acid-base regulator usually refers to substances such as sodium hydroxide and potassium hydroxide.

[0028] By providing the electronically controlled pump 210, the user can precisely control the dosage of the acid-base regulator, thereby precisely adjusting the acid-base balance in the bioreactor, ensuring the stability of the microbial system in the bioreactor, and effectively improving the control accuracy and working stability of the control system.

[0029] Continue to refer to Figure 1 As shown, it can be understood that the desulfurization device 120 is connected to the waste heat recovery device 400, and the waste heat recovery device 400 is provided with a steam pipe 410. A plurality of branch pipes are vertically branched out from the side of the steam pipe 410. The steam pipe 410 is respectively connected to the fermentation tank of the biogas collection device 110 and the biological washing tower and the bioreactor of the desulfurization device 120 through the branch pipes.

[0030] By setting up a waste heat recovery device 400, on the one hand, the waste heat recovery device 400 includes a boiler and a hot water tank, etc. The waste heat recovery device 400 can absorb a large amount of heat generated by the power generation equipment during power generation, thereby cooling the power generation equipment and avoiding damage to the power generation equipment; on the other hand, the heat recovered by the waste heat recovery device can be transferred to the fermentation tank of the biogas collection device 110 and the biological washing tower and bioreactor of the desulfurization device 120 through the steam pipe 410, so as to help biogas fermentation or microbial reaction, save heat energy supply, and improve the green environmental protection of the control system.

[0031] Furthermore, a thermometer 411 and an electric control valve 412 are provided on the steam pipe 410, the detection end of the thermometer 411 is inserted into the steam pipe 410, and the thermometer 411 and the electric control valve 412 are respectively electrically connected to the controller 330. There are multiple electric control valves 412, and the electric control valves 412 are arranged one by one with the branch pipes, and the electric control valves 412 are used to switch the branch pipes.

[0032] By setting the thermometer 411 and the electric control valve 412, the thermometer 411 can detect the heat of the steam pipe 410 in real time, and the controller 330 determines whether to continue to transfer heat to the fermentation tank, biological scrubber, bioreactor and other equipment according to the heat of the steam pipe 410, so as to avoid the influence of excessive temperature on biogas fermentation or microbial reaction, and effectively improve the safety and rationality of the control system. The electric control valve 412 is set in a one-to-one correspondence with the branch pipe, so that the controller 330 can independently control whether to transfer heat to the fermentation tank, biological scrubber, and bioreactor, and further improve the control accuracy of the control system.

[0033] It can be understood that the control device 300 includes a power meter 310, a biogas monitoring box 320 and a controller 330. The power meter 310 is used to detect the output power of the power generation equipment. The power meter 310 is electrically connected to the power generation device 130. The biogas monitoring box 320 is located between the desulfurization device 120 and the power generation device 130 to detect biogas data. Specifically, the biogas monitoring box 320 includes a gas flow meter, an electrochemical sensor and a humidity sensor. The gas flow meter, the electrochemical sensor and the humidity sensor cooperate to detect biogas data. The biogas data includes the biogas volume detected by the gas flow meter, the hydrogen sulfide content detected by the electrochemical sensor, and the humidity value detected by the humidity sensor.

[0034] By setting up a gas flow meter, an electrochemical sensor and a humidity sensor, the power meter 310, the biogas monitoring box 320 and the controller 330 cooperate to detect multiple physical quantities of biogas, thereby improving the completeness of biogas data and facilitating the subsequent controller 330 to accurately calculate the required data.

[0035] Furthermore, the biogas monitoring box 320 further includes an oxygen detection probe, and the control device 300 further includes an alarm, which is connected to the biogas monitoring box 320 .

[0036] Biogas is a flammable and explosive substance. During the biogas desulfurization process, it is necessary to detect the biogas volume, hydrogen sulfide content and oxygen content in real time, and preset reasonable alarm values. Once the biogas monitoring box 320 detects that any of the three values ​​of biogas volume, hydrogen sulfide content and oxygen content exceeds the standard, the controller 330 controls the alarm to alarm immediately to avoid safety accidents and further improve the safety of the control system.

[0037] Reference Figure 2 As shown, it can be understood that the controller 330 is electrically connected to the auxiliary material delivery device 200, the power meter 310 and the biogas monitoring box 320 respectively, and the controller 330 is used to control the delivery amount of the auxiliary material delivery device 200 according to the data collected by the power meter 310 and the data electrically collected by the biogas monitoring box 320.

[0038] Reference Figure 1 As shown, it can be understood that a first flow meter 111 is provided at the input end of the biogas collection device 110, that is, the outlet of the biogas storage device, and a second flow meter 121 is provided at the output end of the desulfurization device 120. The first flow meter 111 and the second flow meter 121 are electrically connected to the controller 330 respectively.

[0039] The first flow meter 111 can detect the first biogas volume output by the biogas storage device, and the second flow meter 121 can detect the second biogas volume after desulfurization. By setting the first flow meter 111 and the second flow meter 121, the control system can obtain the biogas volume before and after desulfurization, and then automatically generate a capacity, cost, and production status report, which is convenient for users to analyze and organize later, and effectively improves the user experience.

[0040] It is understandable that, by setting the control device 300, the controller 330 of the control device 300 can calculate the required theoretical value of biogas according to the power generated by the generator collected by the power meter 310, and further calculate the theoretical value of the auxiliary material addition required by the desulfurization device 120; the controller 330 can calculate the upper limit of the power generation that can be generated by the existing biogas according to the actual data of the biogas after desulfurization collected by the biogas monitoring box 320, and then by comparing the gas requirement data of the generator set preset by the linkage equipment in the power generation device 130, and further calculate the upper limit of the auxiliary material addition. Based on the theoretical value and the upper limit, the controller 330 adjusts the value of the amount of auxiliary material added by the auxiliary material delivery device 200 to the desulfurization device 120, realizes the precise control of the amount of auxiliary material delivery, keeps the system in an ideal state, reduces system failures and raw material consumption, and improves power generation efficiency.

[0041] It can be understood that the control device 300 also includes a display, and the display is connected to the controller 330 .

[0042] By setting up the display, the display can display various parameters in the biogas power generation desulfurization control system. At the same time, the generated capacity, cost, production status report or fault conditions, fault handling methods, etc. can be directly summarized and displayed to the user, which is convenient for users to promptly discover and handle abnormal problems and accumulate handling experience, thereby reducing production costs and personnel errors.

[0043] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A biogas power generation desulfurization control system, characterized in that: include: A biogas power generation body comprises a biogas collection device, a desulfurization device and a power generation device, wherein the biogas collection device, the desulfurization device and the power generation device are connected in sequence; An auxiliary material delivery device, connected to the biogas collecting device to deliver auxiliary materials to the biogas collecting device, and / or connected to the desulfurization device to deliver auxiliary materials to the desulfurization device; The control device includes a power meter, a biogas monitoring box and a controller, wherein the power meter is electrically connected to the power generation device, the biogas monitoring box is located between the desulfurization device and the power generation device to detect biogas data, and the controller is electrically connected to the auxiliary material delivery device, the power meter and the biogas monitoring box respectively, and the controller is used to control the delivery amount of the auxiliary material delivery device according to the data collected by the power meter and the data electrically collected by the biogas monitoring box.

2. A biogas power generation desulfurization control system according to claim 1, characterized in that: The biogas monitoring box comprises a gas flow meter, an electrochemical sensor and a humidity sensor, and the gas flow meter, the electrochemical sensor and the humidity sensor cooperate to detect the biogas data.

3. A biogas power generation desulfurization control system according to claim 2, characterized in that: The auxiliary material delivery device comprises an electronically controlled pump, the electronically controlled pump is connected to the desulfurization device, the electronically controlled pump is connected to a liquid storage tank, and the liquid storage tank stores an acid-base regulator.

4. A biogas power generation desulfurization control system according to claim 1, characterized in that: The desulfurization device is connected to a waste heat recovery device, and the waste heat recovery device is respectively connected to the biogas collection device and the desulfurization device through a steam pipe.

5. A biogas power generation desulfurization control system according to claim 4, characterized in that: The steam pipe is provided with a thermometer and an electric control valve, and the thermometer and the electric control valve are electrically connected to the controller respectively.

6. A biogas power generation desulfurization control system according to claim 1, characterized in that: The input end of the biogas collection device is provided with a first flow meter, and the output end of the desulfurization device is provided with a second flow meter, and the first flow meter and the second flow meter are electrically connected to the controller respectively.

7. A biogas power generation desulfurization control system according to claim 1, characterized in that: The control device also includes an alarm, which is connected to the biogas monitoring box.

8. A biogas power generation desulfurization control system according to claim 1, characterized in that: The control device further comprises a display connected to the controller.

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