Biogas direct combustion heating primary air system

Abstract

The invention relates to a biogas direct-fired heating primary air system, which belongs to the technical field of biogas treatment, and comprises a burner assembly, a first gas flow inlet, a second gas flow inlet, a second gas flow inlet, a third gas flow inlet, a third gas flow inlet, a fourth gas flow inlet and a fourth gas inlet, the burner assembly is provided with a second airflow inlet and a second gas inlet which are communicated with the gas cavity; the first gas path control system is respectively communicated with a first gas source and the first gas inlet; the second gas path control system is respectively communicated with the first gas path control system and the second gas inlet; the gas supply system communicates with the first gas path control system, the second gas path control system and the combustor assembly; and the electric control system is electrically connected with the gas supply system. According to the biogas direct-combustion heating primary air system, cyclic utilization of energy is effectively achieved, and environmental pollution is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of biogas treatment, and in particular to a biogas direct combustion heating primary air system. Background Art

[0002] Biogas is a combustible gas generated by the fermentation and decay of organic matter. The greenhouse effect of methane in biogas is 21 times that of carbon dioxide, so biogas needs to be treated. Existing biogas treatment methods mainly include torch combustion, biogas into furnaces and venting to the atmosphere. However, the torch combustion method is prone to energy waste, the biogas into furnaces method requires continuous cooling air to ensure that the burner is not corroded by the high-temperature flue gas in the furnace, and the method of venting to the atmosphere will cause environmental pollution. Summary of the invention

[0003] Based on this, it is necessary to provide a biogas direct combustion heating primary air system to address the problems that existing biogas treatment methods easily lead to energy waste, require continuous cooling air and pollute the environment.

[0004] A biogas direct combustion heating primary air system comprises: a burner assembly, wherein the burner assembly is provided with a gas cavity, wherein the burner assembly is provided with a first air flow inlet and a first gas inlet communicated with the gas cavity, and wherein the burner assembly is provided with a second air flow inlet and a second gas inlet communicated with the gas cavity; a first gas path control system, wherein the first gas path control system is communicated with a first gas source and the first gas inlet, respectively, and the first gas path control system is used to input gas; a second gas path control system, wherein the second gas path control system is communicated with the first gas path control system and the second gas inlet, respectively, and the second gas path control system is used to input gas; an air intake control system, wherein the air intake control system is communicated with the first air flow inlet, and the air intake control system is used to generate negative pressure to transport external airflow into the gas cavity; an air supply system, wherein the air supply system is communicated with the first gas path control system, the second gas path control system and the burner assembly, respectively; and an electric control system, wherein the electric control system is electrically connected to the air supply system, wherein the first gas path control system and the second gas path control system can generate and send signals to the electric control system, and the electric control system controls the air supply system to supply gas to the first gas path control system, the second gas path control system and the burner assembly according to the received signals. The biogas direct combustion primary air heating system of the present application effectively realizes energy recycling and reduces environmental pollution, and is worthy of promotion.

[0005] The first aspect of the present application discloses a biogas direct combustion heating primary air system. Through the setting of the first gas circuit control system and the second gas circuit control system, different gas sources can be switched according to the actual usage conditions, thereby enhancing the flexibility and reliability of the system. For example, the second gas circuit control system inputs the biogas into the gas chamber through the second gas inlet for ignition, and the first gas circuit control system delivers the biogas through the first gas inlet to provide continuous biogas, thereby preventing the flame in the gas chamber from being extinguished. Through the setting of the air intake control system, combustion-supporting air can be input to provide combustion oxygen for the flame. This design allows the combustion-supporting air to be input and take away the flue gas at one time, thereby preventing high-temperature flue gas from eroding the furnace. Through the setting of the gas supply system, the first gas circuit control system and the second gas circuit control system can adjust the flow rate of biogas respectively to ensure stability and efficiency during the combustion process. Through the connection of the electronic control system with the gas supply system, the electronic control system can receive signals from the first gas circuit control system and the second gas circuit control system, and automatically adjust the gas supply accordingly, thereby realizing intelligent operation and a high degree of automation.

[0006] In one embodiment, the first gas circuit control system includes a first flange ball valve, a first pressure gauge assembly, a filter, a flow meter, a first pneumatic valve, a pressure transmitter assembly, a second pneumatic valve, an electric V-type regulating valve, a first pressure feedback assembly, a second pressure gauge assembly and a flame arrester. The first flange ball valve, the filter, the flow meter, the first pneumatic valve, the second pneumatic valve, the electric V-type regulating valve and the flame arrester are connected in sequence through pipelines. The first flange ball valve is connected to the first gas source through a pipeline. The first pressure gauge assembly is arranged on the pipeline connecting the first flange ball valve and the filter. The pressure transmitter assembly is arranged on the pipeline connecting the first pneumatic valve. and the second pneumatic valve, the first pressure feedback assembly and the second pressure gauge assembly are arranged on the pipeline connecting the electric V-type regulating valve and the flame arrester, the flame arrester is connected to the burner assembly through a pipeline, the first pneumatic valve and the second pneumatic valve are both connected to the gas supply system, the signals of the first pneumatic valve, the pressure transmitter assembly, the second pneumatic valve and the first pressure feedback assembly can be transmitted to the electronic control system, the electronic control system controls the gas supply system to supply gas to the first pneumatic valve and the second pneumatic valve according to the received signals, and the second gas circuit control system is connected to the pipeline for connecting the first pneumatic valve and the second pneumatic valve. The flow meter can accurately measure the biogas flow rate and provide data support for the control analysis of the system. The filter can effectively remove impurities in the biogas to prevent blockage and damage to downstream equipment. The combination of flange ball valve, pneumatic valve and electric V-type regulating valve realizes fine control and regulation of gas flow. The pressure gauge assembly and the pressure transmitter assembly can monitor the pressure condition in the pipeline in real time, and the pressure condition can be fed back so that the first pneumatic valve and the second pneumatic valve can adjust the flow of biogas in the pipeline to ensure that the system operates within a safe range. The flame arrester can effectively prevent flame backflow and improve the overall safety of the system.

[0007] In one embodiment, a third gas circuit control system is also included, the third gas circuit control system includes a third pneumatic valve and a second flange ball valve, the third pneumatic valve is respectively connected to the second gas source and the second flange ball valve through pipelines, the third pneumatic valve is connected to the gas supply system, the signal of the third pneumatic valve can be transmitted to the electric control system, and the second flange ball valve is connected to the pipeline for connecting the first pneumatic valve and the second pneumatic valve. By adding the third gas circuit control system on the basis of the original gas circuit, this product can process biogas from more different sources, increase the biogas flow rate on the first gas circuit control system, and make the biogas processing efficiency higher. The setting of the third pneumatic valve enables the system to automatically control the flow rate of biogas in the third gas circuit control system according to the situation, and the degree of automation is high. By rationally allocating the gas supply of each gas circuit, it is helpful to achieve more complete combustion, thereby improving energy utilization and reducing harmful emissions.

[0008] In one embodiment, a fourth gas circuit control system is further included, wherein the fourth gas circuit control system includes a first threaded ball valve, wherein the number of the first threaded ball valves is multiple, wherein one of the multiple first threaded ball valves is connected to a third gas source, and another of the multiple first threaded ball valves is connected to a pipeline for connecting the first pneumatic valve and the second pneumatic valve, and the multiple first threaded ball valves are connected by pipelines. The fourth gas circuit control system can be configured to input nitrogen to the first gas circuit control system and the second gas circuit control system, and oxygen in the first gas circuit control system and the second gas circuit control system can be emptied before combustion to avoid malfunctions. The threaded ball valve can be configured to effectively control the input amount of nitrogen.

[0009] In one embodiment, the first pressure gauge assembly includes a pressure gauge body and a second threaded ball valve, the pressure gauge body is connected to the second threaded ball valve through a pipeline, and the second threaded ball valve is connected to a pipeline for connecting the first flange ball valve and the filter. The pressure gauge body can display the fluid pressure in the pipeline in real time, which is convenient for operators to understand the pressure status and has higher safety performance. Moreover, when the pressure gauge needs to be repaired or replaced, the second threaded ball valve can be closed to isolate the part of the pipeline to ensure safe operation.

[0010] In one embodiment, the pressure transmitter assembly includes a pressure transmitter body and a third threaded ball valve, wherein the pressure transmitter body is connected to the third threaded ball valve through a pipeline, and the third threaded ball valve is connected to a pipeline for connecting the first pneumatic valve and the second pneumatic valve. The pressure transmitter body can monitor the biogas pressure in the pipeline in real time, and transmit the data to the electronic control system to achieve remote monitoring and automatic control. Moreover, when maintenance or replacement is required, the third threaded ball valve can be closed to isolate the part of the pipeline to ensure safe operation.

[0011] In one embodiment, the first pressure feedback assembly includes a pressure feedback body and a fourth threaded ball valve, wherein the pressure feedback body is connected to the fourth threaded ball valve through a pipeline, and the fourth threaded ball valve is connected to a pipeline for connecting the electric V-type regulating valve and the flame arrester. The gas pressure in the pipeline can be monitored in real time through the setting of the pressure feedback body, and the data can be fed back to the electronic control system for accurate pressure regulation and control. Moreover, when the pressure feedback body needs to be maintained or replaced, the fourth threaded ball valve can be closed to isolate the part of the pipeline to ensure safe operation.

[0012] In one embodiment, the second gas circuit control system includes a valve body, a fourth pneumatic valve and a third pressure gauge assembly, wherein the valve body, the fourth pneumatic valve and the burner assembly are connected in sequence through pipelines, the valve body is connected to the first gas circuit control system through a pipeline, the fourth pneumatic valve is connected to the gas supply system, the signal of the fourth pneumatic valve can be transmitted to the electric control system, the electric control system controls the gas supply system to supply gas to the fourth pneumatic valve according to the received signal, and the third pressure gauge assembly is arranged on the pipeline connecting the fourth pneumatic valve and the burner assembly. Through the combined use of the valve body and the fourth pneumatic valve, the fine control and regulation of the gas flow is realized. The pressure condition in the pipeline of the second gas circuit control system is monitored in real time through the setting of the third pressure gauge assembly to ensure that the system operates within a safe range.

[0013] In one embodiment, it further includes a fifth gas circuit control system and a connecting pipe assembly, wherein the fifth gas circuit control system is connected to the gas supply system through the connecting pipe assembly, and the fifth gas circuit control system is respectively connected to the fourth gas source and the burner assembly. The fifth gas circuit control system is respectively connected to the fourth gas source and the burner assembly, so that compressed air can be delivered from the fifth gas circuit control system to the burner assembly to provide a medium for ignition of the burner assembly. Moreover, the connecting pipe assembly can be controlled to be on and off as needed to control whether the compressed air of the fifth gas circuit control system is delivered to the gas supply system, so that the gas supply of the gas supply system can be effectively adjusted.

[0014] In one embodiment, the fifth gas circuit control system includes a fifth threaded ball valve, a second pressure feedback component and a sixth threaded ball valve, the fourth gas source, the fifth threaded ball valve, the second pressure feedback component and the burner component are connected in sequence through pipelines, the fourth gas source, the fifth threaded ball valve, the second pressure feedback component, the sixth threaded ball valve and the second gas flow inlet of the burner component are connected in sequence through pipelines, and the signal of the second pressure feedback component can be transmitted to the electronic control system. Through the combined use of the fifth threaded ball valve and the sixth threaded ball valve, fine control and regulation of the gas flow is achieved. Through the second pressure feedback component, it can communicate with the electronic control system to achieve automatic control and remote monitoring of the system.

[0015] In one embodiment, the connecting pipe assembly includes a seventh threaded ball valve, and the seventh threaded ball valve is respectively connected to the fifth air circuit control system and the air supply system through pipelines. The seventh threaded ball valve is respectively connected to the fifth air circuit control system and the air supply system through pipelines, so that the compressed air of the fifth air circuit control system can be controlled by controlling the on-off of the seventh threaded ball valve to control whether it is delivered to the air supply system, and the air supply volume of the air supply system can be effectively adjusted.

[0016] In one embodiment, the burner assembly includes a heat preservation barrel, a burner body, an ignition gun, a flame detector and a gas pipe assembly. The burner body, the ignition gun, the flame detector and the gas pipe assembly are all arranged on the heat preservation barrel. The burner body is provided with the gas chamber. The ignition gun is connected to the electronic control system. The flame detector can detect the flame signal and transmit it to the electronic control system. The gas pipe assembly is respectively connected to the first gas circuit control system, the second gas circuit control system, the air intake control system and the burner body, and the ignition gun is connected to the gas chamber. The setting of the heat preservation barrel helps to maintain the temperature of the burner body, reduce heat loss and improve combustion efficiency. The ignition gun is connected to the gas chamber, and the ignition gun can generate sparks to burn the biogas in the gas chamber. The gas pipe assembly is respectively connected to the air intake control system and multiple gas circuit control systems, so that the gas and combustion-supporting gas medium are simultaneously input through multiple channels, providing flexible gas supply and air intake adjustment functions.

[0017] In one embodiment, the gas delivery pipe assembly includes a first gas delivery pipe and a second gas delivery pipe, the first gas delivery pipe is respectively connected to the first gas path control system and the burner body, the first gas delivery pipe is provided with the first gas inlet, the second gas delivery pipe is respectively connected to the air intake control system and the burner body, and the second gas delivery pipe is provided with the first air flow inlet. The first gas delivery pipe and the second gas delivery pipe are arranged so that the input of the fuel gas and the combustion-supporting gas medium do not interfere with each other, and are mixed after being transported to the fuel gas chamber together, thereby improving safety.

[0018] In one embodiment, the gas pipe assembly further includes a third gas pipe, the third gas pipe includes a gas main pipe, a first branch pipe and a second branch pipe, the gas main pipe is connected to the burner body, the ignition gun is inserted in the gas main pipe, the ignition gun extends into the gas chamber after passing through the gas main pipe, the first branch pipe is respectively connected to the second gas path control system and the gas main pipe, the first branch pipe is provided with the second gas inlet, the second branch pipe is connected to the gas main pipe, and the second branch pipe is provided with the second gas flow inlet. The first branch pipe and the second branch pipe are connected to the gas main pipe, and the biogas and compressed air respectively input from the first branch pipe and the second branch pipe are mixed, so that the biogas and compressed air are used for ignition in the gas chamber.

[0019] In one embodiment, the air intake control system includes a suction piece, a silencer, a fan assembly, a third pressure feedback assembly and an electric regulating butterfly valve. The suction piece, the silencer, the fan assembly, the electric regulating butterfly valve and the first airflow inlet of the burner assembly are connected in sequence through a pipeline. The signal of the third pressure feedback assembly can be transmitted to the electronic control system. The electric regulating butterfly valve is connected to the electronic control system, and the electronic control system controls the electric regulating butterfly valve according to the received signal. The suction piece is provided to effectively introduce external air to ensure that the burner assembly obtains sufficient oxygen supply. The silencer significantly reduces the noise generated during the air intake process, thereby improving the comfort of the working environment. The fan assembly is provided to provide a stable airflow to ensure that air enters the burner at an appropriate speed and pressure.

[0020] In one embodiment, the gas supply system includes a first gas supply system and a second gas supply system, the first gas supply system includes an eighth threaded ball valve, a pressure regulating filter, a fourth pressure gauge assembly and a ninth threaded ball valve, and also includes a fifth gas source, the fifth gas source, the eighth threaded ball valve, the pressure regulating filter and the ninth threaded ball valve are connected in sequence through pipelines, the ninth threaded ball valve is respectively connected to the first gas path control system, the second gas path control system and the air intake control system through pipelines, and the fourth pressure gauge assembly is arranged on the pipeline connected to the pressure regulating filter and the ninth threaded ball valve; the second gas supply system includes a tenth threaded ball valve, the tenth threaded ball valve is connected to the pipeline connected to the pressure regulating filter and the ninth threaded ball valve through a pipeline, the tenth threaded ball valve is connected to the burner assembly through a pipeline, and the second gas supply system is used to supply gas to the instrument of the burner assembly. The setting of the pressure regulating filter ensures that the biogas entering the system is purified and pressure-regulated, impurities are removed and a stable pressure is maintained, and the normal operation of subsequent equipment is guaranteed. The setting of the eighth threaded ball valve and the ninth threaded ball valve provides flexible switching and adjustment functions, which is convenient for maintaining and managing each gas path.

[0021] A biogas combustion method is applied to the above-mentioned biogas direct combustion heating primary air system, comprising the following steps: S1, nitrogen is introduced through the fourth gas path control system to evacuate the air from the pipelines of the first gas path control system and the second gas path control system; S2, the first pneumatic valve is opened, and the pressure transmitter transmits the electric signal of the fluid pressure to the electric control system; S3, the electric control system controls the ignition gun to release the electric spark for ignition; S4, the electric control system controls the gas supply system to open the fourth pneumatic valve according to the feedback electric signal; S5, biogas is respectively introduced from the second gas inlet and the second gas inlet. Gas and compressed air, biogas and compressed air are mixed and transported to the ignition gun; S6, the flame detector detects the flame, and transmits the ignition success electrical signal to the electronic control system, and the electronic control system controls the ignition gun to stop discharging; S7, the second electric valve is opened, and the first pressure feedback component transmits the electrical signal of the fluid pressure to the electronic control system; S8, the electronic control system controls the electric V-type regulating valve to adjust the opening to adjust the flow rate according to the feedback electrical signal; S9, biogas and compressed air are respectively input from the first gas inlet and the first air flow inlet, and the biogas and compressed air are mixed in the gas chamber and then burned.

[0022] The second aspect of the present application discloses a biogas combustion method, which reduces the risk of explosion and improves the safety of combustion by introducing nitrogen to evacuate the air in the pipeline. The pressure transmitter monitors the pressure changes in the pipeline in real time, so that the flow rate can be controlled according to the pressure in the pipeline. The fourth pneumatic valve is opened by the electronic control system, and the electronic control system automatically adjusts the pneumatic valve according to real-time data to ensure the accuracy of the gas supply. By mixing biogas and compressed air, it is ensured that the biogas and air are fully mixed before ignition to improve the combustion efficiency. The ignition method controlled by the electronic control system is safer and more reliable, avoiding the risk of manual ignition. The ignition status is monitored in real time by the flame detector to ensure instant feedback of successful ignition, and the ignition gun can be controlled to stop discharging in time to reduce energy consumption. The biogas combustion method of the present application achieves a high degree of automation and flexibility, significantly improving the performance and reliability of the overall system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the first connection diagram of the biogas direct combustion heating primary air system;

[0024] Figure 2 The second connection diagram of the biogas direct combustion heating primary air system;

[0025] Figure 3 A schematic diagram of the connection between the first gas path control system and the second gas path control system;

[0026] Figure 4 It is a connection diagram of the gas supply system, the fifth gas path control system and the connecting pipe assembly;

[0027] Figure 5 This is a connection diagram of the air intake control system;

[0028] Figure 6 An exploded view of a burner assembly, a first gas path control system, and a second gas path control system;

[0029] Figure 7 A three-dimensional diagram of a first gas path control system and a second gas path control system;

[0030] Figure 8 is a first perspective view of a burner assembly;

[0031] Fig. 9 is a second perspective view of the burner assembly.

[0032] The corresponding relationship between the reference numerals and the component names is as follows:

[0033] 1 burner assembly, 11 heat preservation barrel, 12 burner body, 13 ignition gun, 14 flame detector, 15 gas pipe assembly, 151 first gas pipe, 152 second gas pipe, 153 third gas pipe, 1531 gas main pipe, 1532 first branch pipe, 1533 second branch pipe, 101 first air flow inlet, 102 first gas inlet, 103 second air flow inlet, 104 second gas inlet;

[0034] 2 first gas path control system, 21 first flange ball valve, 22 first pressure gauge assembly, 221 pressure gauge body, 222 second threaded ball valve, 23 filter, 24 flow meter, 25 first pneumatic valve, 26 pressure transmitter assembly, 261 pressure transmitter body, 262 third threaded ball valve, 27 second pneumatic valve, 28 electric V-type regulating valve, 29 first pressure feedback assembly, 291 pressure feedback body, 292 fourth threaded ball valve, 210 flame arrester;

[0035] 3 second gas circuit control system, 31 valve body, 32 fourth pneumatic valve, 33 third pressure gauge assembly;

[0036] 4 air inlet control system, 41 suction component, 42 silencer, 43 fan assembly, 44 third pressure feedback assembly, 45 electric regulating butterfly valve;

[0037] 5 air supply system, 51 first air supply system, 511 eighth threaded ball valve, 512 pressure regulating filter, 513 fourth pressure gauge assembly, 514 ninth threaded ball valve, 52 second air supply system, 521 tenth threaded ball valve;

[0038] 6 third gas circuit control system, 61 third pneumatic valve, 62 second flange ball valve;

[0039] 7 fourth gas path control system, 71 first threaded ball valve;

[0040] 8 fifth gas path control system, 81 fifth threaded ball valve, 82 second pressure feedback assembly, 83 sixth threaded ball valve;

[0041] 9 connecting pipe assembly, 91 seventh thread ball valve. DETAILED DESCRIPTION

[0042] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0044] Example 1

[0045] like Figure 1-2 As shown, the present embodiment discloses a biogas direct combustion heating primary air system, comprising: a burner assembly 1, wherein the burner assembly 1 is provided with a gas chamber, wherein the burner assembly 1 is provided with a first air flow inlet 101 and a first gas inlet 102 communicating with the gas chamber, wherein the burner assembly 1 is provided with a second air flow inlet 103 and a second gas inlet 104 communicating with the gas chamber; a first gas circuit control system 2, wherein the first gas circuit control system 2 is respectively communicated with a first gas source and the first gas inlet 102, and the first gas circuit control system 2 is used to input gas; a second gas circuit control system 3, wherein the second gas circuit control system 3 is respectively communicated with the first gas circuit control system 2 and the second gas inlet 104, and the second gas circuit control system System 3 is used to input gas; air intake control system 4, the air intake control system 4 is connected with the first air flow inlet 101, the air intake control system 4 is used to generate negative pressure to transport external airflow into the gas chamber; gas supply system 5, the gas supply system 5 is connected with the first gas path control system 2, the second gas path control system 3 and the burner assembly 1 respectively; electric control system, the electric control system is electrically connected with the gas supply system 5, the first gas path control system 2 and the second gas path control system 3 can generate and send signals to the electric control system, the electric control system controls the gas supply system 5 to supply gas to the first gas path control system 2, the second gas path control system 3 and the burner assembly 1 according to the received signals. The biogas direct combustion heating primary air system of the present application effectively realizes the recycling of energy and reduces environmental pollution, and is worthy of promotion.

[0046] The first aspect of the present application discloses a biogas direct combustion heating primary air system. Through the setting of the first gas circuit control system 2 and the second gas circuit control system 3, different gas sources can be switched according to actual usage conditions, thereby enhancing the flexibility and reliability of the system. For example, the second gas circuit control system 3 inputs biogas into the gas chamber through the second gas inlet 104 for ignition, and the first gas circuit control system 2 delivers biogas through the first gas inlet 102 to provide continuous biogas, thereby preventing the flame in the gas chamber from being extinguished. Through the setting of the air inlet control system 4, combustion-supporting air can be input to provide combustion oxygen for the flame. This design allows the combustion-supporting air to be input once and take away the flue gas, thereby preventing high-temperature flue gas from eroding the furnace. Through the setting of the gas supply system 5, the first gas circuit control system 2 and the second gas circuit control system 3 can adjust the flow rate of biogas respectively to ensure stability and efficiency during the combustion process. Through the connection of the electronic control system with the gas supply system 5, the electronic control system can receive signals from the first gas circuit control system 2 and the second gas circuit control system 3, and automatically adjust the gas supply accordingly, thereby realizing intelligent operation and a high degree of automation.

[0047] like Figure 3As shown, in addition to the features of the above embodiments, this embodiment further defines that: the first gas path control system 2 includes a first flange ball valve 21, a first pressure gauge assembly 22, a filter 23, a flow meter 24, a first pneumatic valve 25, a pressure transmitter assembly 26, a second pneumatic valve 27, an electric V-type regulating valve 28, a first pressure feedback assembly 29, a second pressure gauge assembly and a flame arrester 210, the first flange ball valve 21, the filter 23, the flow meter 24, the first pneumatic valve 25, the second pneumatic valve 27, the electric V-type regulating valve 28 and the flame arrester 210 are connected in sequence through pipelines, the first flange ball valve 21 is connected to the first gas source through a pipeline, the first pressure gauge assembly 22 is arranged on the pipeline connecting the first flange ball valve 21 and the filter 23, and the pressure transmitter assembly 2 6 is arranged on the pipeline connecting the first pneumatic valve 25 and the second pneumatic valve 27, the first pressure feedback component 29 and the second pressure gauge component are arranged on the pipeline connecting the electric V-type regulating valve 28 and the flame arrester 210, the flame arrester 210 is connected with the burner component 1 through a pipeline, the first pneumatic valve 25 and the second pneumatic valve 27 are both connected to the gas supply system 5, the signals of the first pneumatic valve 25, the pressure transmitter component 26, the second pneumatic valve 27 and the first pressure feedback component 29 can be transmitted to the electronic control system, and the electronic control system controls the gas supply system 5 to supply gas to the first pneumatic valve 25 and the second pneumatic valve 27 according to the received signals, and the second gas circuit control system 3 is connected to the pipeline for connecting the first pneumatic valve 25 and the second pneumatic valve 27. The flow meter 24 can accurately measure the biogas flow rate and provide data support for the control analysis of the system. The filter 23 can effectively remove impurities in the biogas to prevent blockage and damage to downstream equipment. The combination of flange ball valve, pneumatic valve and electric V-type regulating valve 28 realizes fine control and regulation of gas flow. The pressure condition in the pipeline can be monitored in real time by setting the pressure gauge assembly and the pressure transmitter assembly 26, and the pressure condition can be fed back so that the first pneumatic valve 25 and the second pneumatic valve 27 can adjust the flow of pipeline biogas to ensure that the system operates within a safe range. The flame backflow can be effectively prevented by setting the flame arrester 210, thereby improving the overall safety of the system.

[0048] like Figure 3As shown, in addition to the features of the above embodiment, this embodiment further defines: it also includes a third gas circuit control system 6, the third gas circuit control system 6 includes a third pneumatic valve 61 and a second flange ball valve 62, the third pneumatic valve 61 is connected to the second gas source and the second flange ball valve 62 through pipelines, the third pneumatic valve 61 is connected to the gas supply system 5, the signal of the third pneumatic valve 61 can be transmitted to the electric control system, and the second flange ball valve 62 is connected to the pipeline for connecting the first pneumatic valve 25 and the second pneumatic valve 27. By adding the third gas circuit control system 6 on the basis of the original gas circuit, this product can process more biogas from different sources, increase the biogas flow rate on the first gas circuit control system 2, and make the biogas processing efficiency higher. The setting of the third pneumatic valve 61 enables the system to automatically control the flow rate of biogas in the third gas circuit control system 6 according to the situation, and the degree of automation is high. By rationally allocating the gas supply of each gas circuit, it is helpful to achieve more complete combustion, thereby improving energy utilization and reducing harmful emissions.

[0049] like Figure 3 As shown, in addition to the features of the above embodiment, this embodiment further defines: it also includes a fourth gas circuit control system 7, the fourth gas circuit control system 7 includes a first threaded ball valve 71, the number of the first threaded ball valve 71 is multiple, one of the multiple first threaded ball valves 71 is connected to the third gas source, another of the multiple first threaded ball valves 71 is connected to the pipeline for connecting the first pneumatic valve 25 and the second pneumatic valve 27, and the multiple first threaded ball valves 71 are connected through pipelines. Through the setting of the fourth gas circuit control system 7, nitrogen can be input to the first gas circuit control system 2 and the second gas circuit control system 3, and oxygen in the first gas circuit control system 2 and the second gas circuit control system 3 can be emptied before combustion to avoid malfunctions. The setting of the threaded ball valve can effectively control the input amount of nitrogen.

[0050] like Figure 3 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the first pressure gauge assembly 22 includes a pressure gauge body 221 and a second threaded ball valve 222, the pressure gauge body 221 and the second threaded ball valve 222 are connected by a pipeline, and the second threaded ball valve 222 is connected to a pipeline for connecting the first flange ball valve 21 and the filter 23. The setting of the pressure gauge body 221 can display the fluid pressure in the pipeline in real time, which is convenient for operators to understand the pressure state and has higher safety performance. Moreover, when the pressure gauge needs to be repaired or replaced, the second threaded ball valve 222 can be closed to isolate the part of the pipeline to ensure safe operation.

[0051] like Figure 3As shown, in addition to the features of the above embodiments, this embodiment further defines that: the pressure transmitter assembly 26 includes a pressure transmitter body 261 and a third threaded ball valve 262, the pressure transmitter body 261 is connected to the third threaded ball valve 262 through a pipeline, and the third threaded ball valve 262 is connected to the pipeline for connecting the first pneumatic valve 25 and the second pneumatic valve 27. The pressure transmitter body 261 can monitor the biogas pressure in the pipeline in real time, and transmit the data to the electronic control system to achieve remote monitoring and automatic control. Moreover, when maintenance or replacement is required, the third threaded ball valve 262 can be closed to isolate the part of the pipeline to ensure safe operation.

[0052] like Figure 3 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the first pressure feedback assembly 29 includes a pressure feedback body 291 and a fourth threaded ball valve 292, the pressure feedback body 291 is connected to the fourth threaded ball valve 292 through a pipeline, and the fourth threaded ball valve 292 is connected to the pipeline for connecting the electric V-type regulating valve 28 and the flame arrester 210. The gas pressure in the pipeline can be monitored in real time through the setting of the pressure feedback body 291, and the data can be fed back to the electronic control system for accurate pressure regulation and control. Moreover, when the pressure feedback body 291 needs to be maintained or replaced, the fourth threaded ball valve 292 can be closed to isolate the part of the pipeline to ensure safe operation.

[0053] like Figure 2 and Figure 3 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the second gas circuit control system 3 includes a valve body 31, a fourth pneumatic valve 32 and a third pressure gauge assembly 33, the valve body 31, the fourth pneumatic valve 32 and the burner assembly 1 are connected in sequence through pipelines, the valve body 31 is connected to the first gas circuit control system 2 through a pipeline, the fourth pneumatic valve 32 is connected to the gas supply system 5, the signal of the fourth pneumatic valve 32 can be transmitted to the electric control system, and the electric control system controls the gas supply system 5 to supply gas to the fourth pneumatic valve 32 according to the received signal, and the third pressure gauge assembly 33 is arranged on the pipeline connecting the fourth pneumatic valve 32 and the burner assembly 1. Through the combined use of the valve body 31 and the fourth pneumatic valve 32, fine control and regulation of the gas flow is achieved. The pressure condition in the pipeline of the second gas circuit control system 3 is monitored in real time through the setting of the third pressure gauge assembly 33 to ensure that the system operates within a safe range.

[0054] like Figure 1 and Figure 4As shown, in addition to the features of the above-mentioned embodiment, this embodiment is further defined as follows: it also includes a fifth gas circuit control system 8 and a connecting pipe assembly 9, the fifth gas circuit control system 8 is connected to the gas supply system 5 through the connecting pipe assembly 9, and the fifth gas circuit control system 8 is respectively connected to the fourth gas source and the burner assembly 1. The fifth gas circuit control system 8 is respectively connected to the fourth gas source and the burner assembly 1, so that compressed air can be transported from the fifth gas circuit control system 8 to the burner assembly 1 to provide a medium for the ignition of the burner assembly 1. Moreover, the connection and disconnection of the connecting pipe assembly 9 can be controlled as needed to control whether the compressed air of the fifth gas circuit control system 8 is transported to the gas supply system 5, which can effectively adjust the gas supply of the gas supply system 5.

[0055] like Figure 4 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the fifth gas circuit control system 8 includes a fifth threaded ball valve 81, a second pressure feedback component 82 and a sixth threaded ball valve 83, the fourth gas source, the fifth threaded ball valve 81, the second pressure feedback component 82 and the burner component 1 are connected in sequence through pipelines, the fourth gas source, the fifth threaded ball valve 81, the second pressure feedback component 82, the sixth threaded ball valve 83 and the second gas flow inlet 103 of the burner component 1 are connected in sequence through pipelines, and the signal of the second pressure feedback component 82 can be transmitted to the electronic control system. Through the combined use of the fifth threaded ball valve 81 and the sixth threaded ball valve 83, fine control and regulation of the gas flow rate are achieved. Through the second pressure feedback component 82, it can communicate with the electronic control system to achieve automatic control and remote monitoring of the system.

[0056] like Figure 4 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the connecting pipe assembly 9 includes a seventh threaded ball valve 91, and the seventh threaded ball valve 91 is respectively connected to the fifth gas circuit control system 8 and the gas supply system 5 through pipelines. The seventh threaded ball valve 91 is respectively connected to the fifth gas circuit control system 8 and the gas supply system 5 through pipelines, so that the compressed air of the fifth gas circuit control system 8 can be controlled to be delivered to the gas supply system 5 by controlling the on-off of the seventh threaded ball valve 91, and the gas supply amount of the gas supply system 5 can be effectively adjusted.

[0057] like Figure 1 and Figure 6As shown, in addition to the features of the above embodiment, this embodiment further defines: the burner assembly 1 includes a heat preservation barrel 11, a burner body 12, an ignition gun 13, a flame detector 14 and a gas pipe assembly 15, the burner body 12, the ignition gun 13, the flame detector 14 and the gas pipe assembly 15 are all arranged on the heat preservation barrel 11, the burner body 12 is provided with the gas chamber, the ignition gun 13 is connected to the electronic control system, the flame detector 14 can detect the flame signal and transmit it to the electronic control system, the gas pipe assembly 15 is respectively connected to the first gas circuit control system 2, the second gas circuit control system 3, the air intake control system 4 and the burner body 12, and the ignition gun 13 is connected to the gas chamber. The setting of the heat preservation barrel 11 helps to maintain the temperature of the burner body 12, reduce heat loss, and improve combustion efficiency. The ignition gun 13 is connected to the gas chamber, and the ignition gun 13 can generate sparks to burn the biogas in the gas chamber. The gas pipe assembly 15 is connected to the air intake control system 4 and multiple gas path control systems respectively, so that the fuel gas and combustion-supporting gas medium can be input simultaneously through multiple channels, providing flexible gas supply and air intake regulation functions.

[0058] like Figure 8 and Fig. 9 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the gas delivery pipe assembly 15 includes a first gas delivery pipe 151 and a second gas delivery pipe 152, the first gas delivery pipe 151 is respectively connected to the first gas path control system 2 and the burner body 12, the first gas delivery pipe 151 is provided with the first gas inlet 102, the second gas delivery pipe 152 is respectively connected to the air intake control system 4 and the burner body 12, and the second gas delivery pipe 152 is provided with the first gas inlet 101. The arrangement of the first gas delivery pipe 151 and the second gas delivery pipe 152 ensures that the input of the fuel gas and the combustion-supporting gas medium do not interfere with each other, and are mixed after being transported to the fuel gas chamber together, thereby improving safety.

[0059] like Fig. 9As shown, in addition to the features of the above embodiments, this embodiment further defines: the gas pipe assembly 15 also includes a third gas pipe 153, the third gas pipe 153 includes a gas main pipe 1531, a first branch pipe 1532 and a second branch pipe 1533, the gas main pipe 1531 is connected to the burner body 12, the ignition gun 13 is penetrated by the gas main pipe 1531, and the ignition gun 13 extends into the gas chamber after passing through the gas main pipe 1531, the first branch pipe 1532 is respectively connected to the second gas path control system 3 and the gas main pipe 1531, the first branch pipe 1532 is provided with the second gas inlet 104, the second branch pipe 1533 is connected to the gas main pipe 1531, and the second branch pipe 1533 is provided with the second gas flow inlet 103. The first branch pipe 1532 and the second branch pipe 1533 are connected to the gas transmission main pipe 1531, and the biogas and compressed air input from the first branch pipe 1532 and the second branch pipe 1533 are mixed so that the biogas and the compressed air are used for ignition in the gas chamber.

[0060] like Figure 5 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the air intake control system 4 includes a suction piece 41, a silencer 42, a fan assembly 43, a third pressure feedback assembly 44 and an electric regulating butterfly valve 45, the suction piece 41, the silencer 42, the fan assembly 43, the electric regulating butterfly valve 45 and the first airflow inlet 101 of the burner assembly 1 are connected in sequence through a pipeline, the signal of the third pressure feedback assembly 44 can be transmitted to the electric control system, the electric regulating butterfly valve 45 is connected to the electric control system, and the electric control system controls the electric regulating butterfly valve 45 according to the received signal. The suction piece 41 is set to effectively introduce external air to ensure that the burner assembly 1 obtains sufficient oxygen supply. The silencer 42 significantly reduces the noise generated during the air intake process, thereby improving the comfort of the working environment. The fan assembly 43 is set to provide a stable airflow to ensure that the air enters the burner at an appropriate speed and pressure.

[0061] like Figure 4As shown, in addition to the features of the above embodiments, this embodiment further defines that: the air supply system 5 includes a first air supply system 51 and a second air supply system 52, the first air supply system 51 includes an eighth threaded ball valve 511, a pressure regulating filter 512, a fourth pressure gauge assembly 513 and a ninth threaded ball valve 514, and also includes a fifth air source, the fifth air source, the eighth threaded ball valve 511, the pressure regulating filter 512 and the ninth threaded ball valve 514 are connected in sequence through pipelines, and the ninth threaded ball valve 514 is respectively connected to the first air path control system 2, the The second gas circuit control system 3 and the air intake control system 4 are connected through a pipeline, and the fourth pressure gauge assembly 513 is arranged on the pipeline connected to the pressure regulating filter 512 and the ninth threaded ball valve 514; the second gas supply system 52 includes a tenth threaded ball valve 521, and the tenth threaded ball valve 521 is connected to the pipeline connected to the pressure regulating filter 512 and the ninth threaded ball valve 514 through a pipeline, and the tenth threaded ball valve 521 is connected to the burner assembly 1 through a pipeline, and the second gas supply system 52 is used to supply gas to the instrument of the burner assembly 1. The setting of the pressure regulating filter 512 ensures that the biogas entering the system is purified and pressure-regulated, impurities are removed and a stable pressure is maintained, so as to ensure the normal operation of subsequent equipment. The setting of the eighth threaded ball valve 511 and the ninth threaded ball valve 514 provides flexible switching and adjustment functions, which is convenient for maintenance and management of each gas circuit.

[0062] Example 2

[0063] The present embodiment discloses a biogas combustion method, which is applied to the above-mentioned biogas direct combustion heating primary air system, and includes the following steps: S1, nitrogen is introduced through the fourth gas path control system 7, and air is evacuated from the pipelines of the first gas path control system 2 and the second gas path control system 3; S2, the first pneumatic valve 25 is opened, and the pressure transmitter assembly 26 transmits the electric signal of the fluid pressure to the electric control system; S3, the electric control system controls the ignition gun 13 to release electric sparks for ignition; S4, the electric control system controls the gas supply system 5 to open the fourth pneumatic valve 32 according to the feedback electric signal; S5, the second gas inlet 104 and the second gas inlet 10 3. Biogas and compressed air are input respectively, and the biogas and compressed air are mixed and transported to the ignition gun 13; S6. The flame detector 14 detects the flame and transmits the ignition success electric signal to the electronic control system, and the electronic control system controls the ignition gun 13 to stop discharging; S7. The second electric valve is opened, and the first pressure feedback component 29 transmits the electric signal of the fluid pressure to the electronic control system; S8. The electronic control system controls the electric V-type regulating valve 28 to adjust the opening to adjust the flow rate according to the feedback electric signal; S9. Biogas and compressed air are input respectively from the first gas inlet 102 and the first air flow inlet 101, and the biogas and compressed air are mixed and burned in the gas chamber.

[0064] The second aspect of the present application discloses a biogas combustion method, which reduces the risk of explosion and improves the safety of combustion by introducing nitrogen to evacuate the air in the pipeline. The pressure change in the pipeline is monitored in real time by a pressure transmitter, so that the flow rate can be controlled according to the pressure in the pipeline. The fourth pneumatic valve 32 is opened by the electronic control system, and the electronic control system automatically adjusts the pneumatic valve according to real-time data to ensure the accuracy of the gas supply. By mixing biogas and compressed air, it is ensured that the biogas and air are fully mixed before ignition to improve the combustion efficiency. The ignition method controlled by the electronic control system is safer and more reliable, avoiding the risk of manual ignition. The ignition state is monitored in real time by the flame detector 14 to ensure instant feedback of successful ignition, and the ignition gun 13 can be controlled to stop discharging in time to reduce energy consumption. The biogas combustion method of the present application achieves a high degree of automation and flexibility, and significantly improves the performance and reliability of the overall system.

[0065] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A biogas direct combustion primary air heating system, characterized in that: include: A burner assembly (1), the burner assembly (1) being provided with a gas chamber, the burner assembly (1) being provided with a first air flow inlet (101) and a first gas inlet (102) communicating with the gas chamber, the burner assembly (1) being provided with a second air flow inlet (103) and a second gas inlet (104) communicating with the gas chamber; A first gas circuit control system (2), the first gas circuit control system (2) being connected to the first gas source and the first gas inlet (102) respectively, and the first gas circuit control system (2) being used to input gas; A second gas circuit control system (3), the second gas circuit control system (3) being in communication with the first gas circuit control system (2) and the second fuel gas inlet (104) respectively, the second gas circuit control system (3) being used for inputting fuel gas; an air intake control system (4), the air intake control system (4) being in communication with the first air flow inlet (101), the air intake control system (4) being used to generate negative pressure to transport external air flow into the combustion chamber; An air supply system (5), the air supply system (5) being in communication with the first air path control system (2), the second air path control system (3) and the burner assembly (1) respectively; An electric control system, wherein the electric control system is electrically connected to the gas supply system (5), the first gas circuit control system (2) and the second gas circuit control system (3) are capable of generating and sending signals to the electric control system, and the electric control system controls the gas supply system (5) to supply gas to the first gas circuit control system (2), the second gas circuit control system (3) and the burner assembly (1) according to the received signals.

2. The biogas direct combustion primary air heating system according to claim 1 is characterized in that: The first gas path control system (2) comprises a first flange ball valve (21), a first pressure gauge assembly (22), a filter (23), a flow meter (24), a first pneumatic valve (25), a pressure transmitter assembly (26), a second pneumatic valve (27), an electric V-type regulating valve (28), a first pressure feedback assembly (29), a second pressure gauge assembly and a flame arrester (210); the first flange ball valve (21), the filter (23), the flow meter (24), the first pneumatic valve (25), the second pneumatic valve (27), the electric V-type regulating valve (28) and the flame arrester (210) are connected in sequence through pipelines; the first flange ball valve (21) is connected to the first gas source through a pipeline; the first pressure gauge assembly (22) is arranged on a pipeline connecting the first flange ball valve (21) and the filter (23); the pressure transmitter assembly (26) is arranged on a pipeline connecting the first The first pressure feedback component (29) and the second pressure gauge component are arranged on the pipeline connecting the electric V-type regulating valve (28) and the flame arrester (210); the flame arrester (210) is communicated with the burner component (1) through a pipeline; the first pneumatic valve (25) and the second pneumatic valve (27) are both connected to the air supply system (5); the signals of the first pneumatic valve (25), the pressure transmitter component (26), the second pneumatic valve (27) and the first pressure feedback component (29) can be transmitted to the electronic control system; the electronic control system controls the air supply system (5) to supply air to the first pneumatic valve (25) and the second pneumatic valve (27) according to the received signals; the second air path control system (3) is connected to the pipeline for connecting the first pneumatic valve (25) and the second pneumatic valve (27).

3. The biogas direct combustion primary air heating system according to claim 2 is characterized in that: The third air circuit control system (6) further comprises a third air circuit control system (6), the third air circuit control system (6) comprising a third pneumatic valve (61) and a second flange ball valve (62), the third pneumatic valve (61) being connected to a second air source and the second flange ball valve (62) via pipelines, the third pneumatic valve (61) being connected to the air supply system (5), a signal of the third pneumatic valve (61) being capable of being transmitted to the electric control system, and the second flange ball valve (62) being in communication with a pipeline for connecting the first pneumatic valve (25) and the second pneumatic valve (27); And / or further includes a fourth air path control system (7), wherein the fourth air path control system (7) includes a first threaded ball valve (71), wherein the number of the first threaded ball valves (71) is multiple, wherein one of the multiple first threaded ball valves (71) is connected to a third air source, and another of the multiple first threaded ball valves (71) is connected to a pipeline for connecting the first pneumatic valve (25) and the second pneumatic valve (27), and the multiple first threaded ball valves (71) are connected to each other via pipelines.

4. The biogas direct combustion primary air heating system according to claim 2, characterized in that: The first pressure gauge assembly (22) comprises a pressure gauge body (221) and a second threaded ball valve (222), the pressure gauge body (221) and the second threaded ball valve (222) are connected via a pipeline, and the second threaded ball valve (222) is in communication with a pipeline for connecting the first flange ball valve (21) and the filter (23); and / or the pressure transmitter assembly (26) comprises a pressure transmitter body (261) and a third threaded ball valve (262), the pressure transmitter body (261) and the third threaded ball valve (262) are connected via a pipeline, and the third threaded ball valve (262) is connected to a pipeline for connecting the first pneumatic valve (25) and the second pneumatic valve (27); And / or the first pressure feedback assembly (29) comprises a pressure feedback component body (291) and a fourth threaded ball valve (292), the pressure feedback component body (291) and the fourth threaded ball valve (292) are connected via a pipeline, and the fourth threaded ball valve (292) is connected to a pipeline for connecting the electric V-type regulating valve (28) and the flame arrester (210).

5. The biogas direct combustion primary air heating system according to claim 1 is characterized in that: The second gas circuit control system (3) comprises a valve body (31), a fourth pneumatic valve (32) and a third pressure gauge assembly (33); the valve body (31), the fourth pneumatic valve (32) and the burner assembly (1) are connected in sequence via pipelines; the valve body (31) is connected to the first gas circuit control system (2) via a pipeline; the fourth pneumatic valve (32) is connected to the air supply system (5); a signal of the fourth pneumatic valve (32) can be transmitted to the electric control system; the electric control system controls the air supply system (5) to supply air to the fourth pneumatic valve (32) according to the received signal; and the third pressure gauge assembly (33) is arranged on the pipeline connecting the fourth pneumatic valve (32) and the burner assembly (1).

6. The biogas direct combustion primary air heating system according to claim 1, characterized in that: It also comprises a fifth gas circuit control system (8) and a connecting pipe assembly (9), wherein the fifth gas circuit control system (8) is connected to the gas supply system (5) via the connecting pipe assembly (9), and the fifth gas circuit control system (8) is respectively connected to a fourth gas source and the burner assembly (1).

7. The biogas direct combustion primary air heating system according to claim 6, characterized in that: The fifth gas path control system (8) comprises a fifth threaded ball valve (81), a second pressure feedback component (82) and a sixth threaded ball valve (83); the fourth gas source, the fifth threaded ball valve (81), the second pressure feedback component (82) and the burner component (1) are connected in sequence through pipelines; the fourth gas source, the fifth threaded ball valve (81), the second pressure feedback component (82), the sixth threaded ball valve (83) and the second gas flow inlet (103) of the burner component (1) are connected in sequence through pipelines; and the signal of the second pressure feedback component (82) can be transmitted to the electronic control system; And / or the connecting pipe assembly (9) comprises a seventh threaded ball valve (91), and the seventh threaded ball valve (91) is respectively connected to the fifth air path control system (8) and the air supply system (5) through pipelines.

8. The biogas direct combustion primary air heating system according to claim 1 is characterized in that: The burner assembly (1) comprises a heat preservation barrel (11), a burner body (12), an ignition gun (13), a flame detector (14) and a gas pipe assembly (15); the burner body (12), the ignition gun (13), the flame detector (14) and the gas pipe assembly (15) are all arranged on the heat preservation barrel (11); the burner body (12) is provided with the gas chamber; the ignition gun (13) is connected to the electric control system; the flame detector (14) can detect a flame signal and transmit it to the electric control system; the gas pipe assembly (15) is respectively connected to the first gas circuit control system (2), the second gas circuit control system (3), the air intake control system (4) and the burner body (12); the ignition gun (13) is in communication with the gas chamber.

9. The biogas direct combustion primary air heating system according to claim 8, characterized in that: The gas delivery pipe assembly (15) comprises a first gas delivery pipe (151) and a second gas delivery pipe (152); the first gas delivery pipe (151) is respectively connected to the first gas path control system (2) and the burner body (12); the first gas delivery pipe (151) is provided with the first gas inlet (102); the second gas delivery pipe (152) is respectively connected to the air intake control system (4) and the burner body (12); the second gas delivery pipe (152) is provided with the first gas flow inlet (101); And / or the gas delivery pipe assembly (15) further comprises a third gas delivery pipe (153), the third gas delivery pipe (153) comprising a gas delivery main pipe (1531), a first branch pipe (1532) and a second branch pipe (1533), the gas delivery main pipe (1531) being connected to the burner body (12), the ignition gun (13) being inserted through the gas delivery main pipe (1531), the ignition gun (13) extending into the gas chamber after passing through the gas delivery main pipe (1531), the first branch pipe (1532) being connected to the second gas path control system (3) and the gas delivery main pipe (1531) respectively, the first branch pipe (1532) being provided with the second gas inlet (104), the second branch pipe (1533) being connected to the gas delivery main pipe (1531), and the second branch pipe (1533) being provided with the second gas flow inlet (103).

10. The biogas direct combustion primary air heating system according to claim 1, characterized in that: The air intake control system (4) comprises a suction piece (41), a silencer (42), a fan assembly (43), a third pressure feedback assembly (44) and an electric regulating butterfly valve (45); the suction piece (41), the silencer (42), the fan assembly (43), the electric regulating butterfly valve (45) and the first air flow inlet (101) of the burner assembly (1) are connected in sequence through a pipeline; a signal of the third pressure feedback assembly (44) can be transmitted to the electric control system; the electric regulating butterfly valve (45) is connected to the electric control system; and the electric control system controls the electric regulating butterfly valve (45) according to the received signal; And / or the air supply system (5) comprises a first air supply system (51) and a second air supply system (52), the first air supply system (51) comprising an eighth threaded ball valve (511), a pressure regulating filter (512), a fourth pressure gauge assembly (513) and a ninth threaded ball valve (514), and further comprising a fifth air source, the fifth air source, the eighth threaded ball valve (511), the pressure regulating filter (512) and the ninth threaded ball valve (514) being connected in sequence via pipelines, the ninth threaded ball valve (514) being connected to the first air path control system (2), the second air path control system (3) and the air intake control system (4) via pipelines, and the fourth pressure gauge assembly (513) being arranged on the pipeline connecting the pressure regulating filter (512) and the ninth threaded ball valve (514); The second air supply system (52) comprises a tenth threaded ball valve (521), the tenth threaded ball valve (521) being connected to the pressure regulating filter (512) and the pipeline connecting the ninth threaded ball valve (514) through a pipeline, the tenth threaded ball valve (521) being connected to the burner assembly (1) through a pipeline, and the second air supply system (52) is used to supply air to the instruments of the burner assembly (1).

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