A biogas pressurization and boiler linkage control system

Abstract

The utility model discloses a kind of biogas pressurization and boiler linkage control system, the system includes detection system and control system, detection system and control system are connected total controller, are controlled by total controller, the detection system is connected with biogas collecting device and boiler respectively, two parts consisting of start-up detection module and real-time detection module, start-up detection module is connected with boiler and biogas collecting device by on-off value input processing circuit, real-time detection module is composed of two separate sensors, wherein the sensor in boiler is connected with total controller by gateway or serial server, the sensor in biogas collecting device is connected with total controller by analog input processing system, real-time data is sent to total controller and handled.The utility model structure is simple and reasonable, coordinate synchronous work, ensure the stable combustion of biogas and avoid resource waste.

Description

Technical Field

[0001] This utility model belongs to the field of control technology and relates to a biogas pressurization and boiler linkage control system. Background Technology

[0002] With the development of the wastewater treatment industry, the biogas produced after wastewater treatment is problematic. Because biogas may contain highly toxic hydrogen sulfide, even low concentrations can cause respiratory damage, while high concentrations can lead to instantaneous coma or death. Furthermore, methane's greenhouse potential is more than 25 times that of carbon dioxide, and direct emissions would significantly exacerbate global warming. Therefore, it cannot be directly emitted and is instead burned in boilers. The resulting hot water or steam can also be utilized. However, due to investment considerations, many projects do not include biogas storage devices. In addition, the biogas booster fans are controlled by the biogas treatment plants themselves. The unstable biogas production causes large fluctuations in fan frequency, leading to unstable combustion, increased boiler malfunctions, and ultimately, a significant amount of biogas is burned outdoors, resulting in energy waste.

[0003] To address this issue, a biogas pressurization and boiler linkage control system was designed to overcome the aforementioned problems. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a biogas pressurization and boiler linkage control system and its control method that is simple and reasonable in structure, works in coordination and synchronization, ensures stable combustion of biogas and avoids resource waste.

[0005] This utility model is achieved through the following technical solution: a biogas pressurization and boiler linkage control system, which includes a detection system and a control system. Both the detection system and the control system are connected to a main controller and controlled by the main controller. The detection system is connected to the biogas collection device and the boiler respectively, and consists of two parts: a start-up detection module and a real-time detection module. The start-up detection module is connected to the boiler and the biogas collection device through a switch input processing circuit. The real-time detection module consists of two separate sensors. The sensor in the boiler is connected to the main controller through a gateway or serial port server, and the sensor in the biogas collection device is connected to the main controller through an analog input processing system, sending real-time data to the main controller for processing.

[0006] Preferably, the control system consists of two control systems, one for controlling the boiler and the other for controlling the biogas collection device. The boiler control system controls the boiler's on / off state and the burner's combustion level. The biogas collection device control system controls the size of the biogas booster fan in the biogas collection device, which consists of a start / stop signal and a channel regulator.

[0007] Preferably, an outdoor biogas ignition device is also provided outside the biogas collection device. This outdoor biogas ignition device is also connected to the main controller, and the outdoor ignition device is activated by detecting the pressure inside the biogas collection device.

[0008] The beneficial effects of this utility model are as follows: The biogas booster and boiler linkage control system designed in this utility model works in a coordinated and synchronous manner through the start-up detection module and the real-time detection module to ensure stable combustion of biogas and avoid resource waste. It can also precisely control the combustion process, reduce methane emissions from incomplete combustion, and reduce environmental pollution. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall modular structure of this utility model; Figure 2 This is a flowchart of the control method of this utility model. Detailed Implementation

[0010] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0011] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0012] The present invention will now be described in detail with reference to the accompanying drawings: Figure 1 As shown, a biogas pressurization and boiler linkage control system includes a detection system and a control system. Both the detection system and the control system are connected to a main controller 7 and controlled by the main controller 7. The detection system is connected to the biogas collection device and the boiler 9 respectively, and consists of two parts: a start-up detection module 1 and a real-time detection module 3. The start-up detection module 1 is connected to the boiler 9 and the biogas collection device through a digital input processing circuit 2. The real-time detection module consists of two separate sensors. The sensor 5 in the boiler 9 is connected to the main controller 7 through a gateway or serial port server 6, and the sensor 3 in the biogas collection device is connected to the main controller 7 through an analog input processing system 4, which sends real-time data to the main controller for processing.

[0013] The control system consists of two control systems. One control system controls the boiler 9, and the other control system controls the biogas collection device. The boiler control system controls the on / off of the boiler 9 and the combustion level of the burner 11. The biogas collection device control system controls the size of the biogas booster fan 15 in the biogas collection device. The biogas booster fan 15 consists of a start / stop signal 12 and a channel regulator 14.

[0014] An outdoor biogas ignition device 16 is also arranged outside the biogas collection device. The outdoor biogas ignition device 16 is also connected to the main controller 7. The outdoor ignition device 16 is activated by detecting the pressure inside the biogas collection device.

[0015] like Figure 2 As shown, a method for linkage control of biogas pressurization and boiler is disclosed, the method comprising the following steps: 1) Start-up inspection: Check whether boiler 9 and biogas collection device are normal. The inspection scope includes whether there is overpressure, underpressure, fault light, and whether the operation signal is unobstructed. 2) After receiving a normal signal, the main controller 7 starts the boiler 9 and the biogas collection device, and activates the sensors 3 in the boiler 9 and the biogas collection device for real-time monitoring, and feeds the data back to the main controller 7 in real time. 3) If a problem is found in the pressure of the biogas collection device during monitoring, adjust the number of boilers 8, adjust the combustion degree of the burner 10, or adjust the frequency converter 13 of the biogas booster fan 15.

[0016] The specific adjustment method in step 3) is to operate according to the preset value based on the measured pressure of the biogas collection device. The specific preset value is: When the measured pressure is less than 1 kPa, boiler 9 will be selectively shut down, and some boilers 9 will enter the pilot fire mode. When the measured pressure is between 1 kPa and 6 kPa, it is within the normal range. Boiler 9 operates according to the predetermined settings, and biogas booster blower 15 enters normal inverter operation without any processing. When the measured pressure is greater than 6 kPa, turn on all boilers and set the frequency converter to maximum. After running for a period of time, check if the pressure drops to below 6 kPa.

[0017] If the pressure is still greater than 6 kPa after running for 30 minutes when it is greater than 6 kPa, then the biogas outdoor ignition device 16 will be turned on to perform outdoor ignition treatment until it is reduced to below 6 kPa.

[0018] Compared with existing technologies, the boiler, biogas booster fan, and outdoor biogas ignition of this utility model are all controlled by a single system, achieving coordinated and synchronous operation, ensuring stable combustion of biogas and preventing waste.

[0019] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A biogas pressurization and boiler linkage control system, the system comprising a detection system and a control system, both connected to a main controller and controlled by the main controller, characterized in that, The detection system is connected to the biogas collection device and the boiler respectively, and consists of two parts: a start-up detection module and a real-time detection module. The start-up detection module is connected to the boiler and the biogas collection device through a digital input processing circuit. The real-time detection module consists of two separate sensors. The sensor in the boiler is connected to the main controller through a gateway or serial port server, and the sensor in the biogas collection device is connected to the main controller through an analog input processing system, which sends the real-time data to the main controller for processing.

2. The biogas pressurization and boiler linkage control system according to claim 1, characterized in that, The control system consists of two control systems. One control system controls the boiler, and the other control system controls the biogas collection device. The boiler control system controls the boiler's on / off state and the burner's combustion level. The biogas collection device control system controls the size of the biogas booster fan in the biogas collection device. The biogas booster fan consists of a start / stop signal and a channel regulator.

3. The biogas pressurization and boiler linkage control system according to claim 1, characterized in that, An outdoor biogas ignition device is also installed outside the biogas collection device. This outdoor biogas ignition device is also connected to the main controller. The outdoor ignition device is activated by detecting the pressure inside the biogas collection device.

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