Multi-channel burner with cleaning function

Abstract

The utility model relates to the technical field of combustors, and discloses a multi-channel combustor with a cleaning function, which comprises a combustor body and a biomass gas pipeline, the combustor body is provided with a first heat exchanger, and the biomass gas pipeline comprises a gas supply pipe section, a filter, an electromagnetic valve, a heat exchange pipe section and a gas inlet pipe section. The heat exchange pipe section is provided with a second heat exchanger, an outlet of the first heat exchanger is connected with an inlet of the second heat exchanger through a pipeline, the inlet of the first heat exchanger is connected with an outlet of the second heat exchanger through a pipeline, and a circulation pipeline is formed between the first heat exchanger and the second heat exchanger. The biomass gas burner has the following advantages and effects that a refrigerant is used as a medium, biomass gas is preheated through heat of the burner body, heat loss is reduced, meanwhile, the structure of the filter is improved, a plurality of filter screens are used one by one, and the dismounting period of the filter is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a multi-channel burner with a cleaning function. Background Art

[0002] As the material basis of production, energy plays a role in promoting economic and social development. The current energy structure is still dominated by fossil energy represented by coal and oil. With the continuous development of the economy, it is necessary to seek clean energy to improve the energy consumption structure. Biomass, as a renewable energy source, is converted from solar energy by plants and has the characteristics of large resource quantity, renewable and clean. Among many biomass energy conversions, biomass gasification is currently the fastest developing and most potential technology in the conversion and utilization of biomass energy. It mainly converts biomass into combustible gases containing CO, H 2 etc. during a certain mechanical condition with air, steam or hydrogen as the gasifying agent. During the combustion process of biomass gas, due to the large variation in its composition, in order to ensure complete combustion, the air volume is generally designed to be large, which will cause a relatively high heat loss of the burner. At the same time, due to the high tar content in biomass gas, the phenomenon of tar adhering to the solenoid valve will occur during the long-term operation of the burner, resulting in the solenoid valve in the system pipeline being unable to open normally. Content of the Utility Model

[0003] The purpose of the utility model is to provide a multi-channel burner with a cleaning function, which has the effects of reducing heat loss and extending the replacement cycle of the filter screen.

[0004] The above technical purpose of the utility model is achieved through the following technical solutions: A multi-channel burner with a cleaning function includes a burner body and a biomass gas pipeline. The burner body is provided with a first heat exchanger. The biomass gas pipeline includes a gas supply section, a filter, a solenoid valve, a heat exchange pipe section, and an air inlet section. The heat exchange pipe section is equipped with a second heat exchanger. A pipeline is connected between the outlet of the first heat exchanger and the inlet of the second heat exchanger, and between the inlet of the first heat exchanger and the outlet of the second heat exchanger. A circulation pipeline is formed between the first heat exchanger and the second heat exchanger, and a refrigerant is filled in the circulation pipeline. The second heat exchanger is higher than the first heat exchanger. The filter includes a seat body, a channel formed in the seat body, and several operating rods rotatably arranged on the side wall of the seat body. Each operating rod is fixed with a filter screen. The contour of the filter screen is circular and located in the channel. Multiple filter screens are arranged in sequence along the axial direction of the channel.

[0005] By adopting the above technical solution, the biomass gas sequentially passes through the gas supply pipe section, the filter, the solenoid valve, the heat exchange pipe section, and the air inlet pipe section and then enters the burner body, where it burns. The utility model uniquely uses the first heat exchanger, the second heat exchanger and the pipeline to form a circulation pipeline. The refrigerant absorbs heat in the first heat exchanger and becomes gaseous, rises to the second heat exchanger, and exchanges heat with the biomass gas in the heat exchange pipe section in the second heat exchanger. Using the refrigerant as a medium, the heat at the burner body is used to preheat the biomass gas, making full use of the heat energy and reducing heat loss.

[0006] Meanwhile, the utility model improves the structure of the filter. Along the flowing direction of the biomass gas, from the upstream to the downstream, the staff only needs to regularly rotate the operating rod to successively use the filter screens, that is, the upstream filter screen is used first, and after using for a period of time, the downstream filter screen is used, which can significantly extend the replacement cycle of the filter screen.

[0007] It should be noted that when the filter screen is in the channel cross-section, the filter screen is in the filtering and using state. When the filter screen rotates 90 degrees to open the channel, the filter screen is in the non-filtering and unused state.

[0008] A further setting of the utility model is that: the circulation pipeline includes a bypass pipeline, and a pump is installed on the bypass pipeline.

[0009] By adopting the above technical solution, when the refrigerant circulation in the circulation pipeline is not smooth, the pump can be used to transport the refrigerant.

[0010] A further setting of the utility model is that: the circulation pipeline is provided with an opening and closing valve, and the opening and closing valve is arranged in parallel with the pump.

[0011] By adopting the above technical solution, when the opening and closing valve is closed, the pump is started to realize the function of pumping the refrigerant.

[0012] A further setting of the utility model is that: an exhaust pipe and a pressure relief valve are provided at the upper end of the circulation pipeline, and a drain pipe and a drain valve are installed below the circulation pipeline.

[0013] By adopting the above technical solution, when it is not necessary to use the refrigerant for heat exchange, the pressure relief valve and the drain valve are opened, and the liquid refrigerant flows out from the drain valve, and the gaseous refrigerant is discharged from the pressure relief valve.

[0014] A further setting of the utility model is that: the first heat exchanger includes a copper pipe arranged on the outer wall of the burner body.

[0015] A further setting of the utility model is that: connecting flanges are provided at both ends of the filter.

[0016] By adopting the above technical solution, the two connecting flanges at both ends of the filter are respectively used to connect with the pipelines at both ends.

[0017] The further setting of the present utility model is that: the seat body is divided into multiple sub-seat units, each of the sub-seat units corresponds to a control lever and a filter screen, and adjacent two of the sub-seat units are connected by bolts and nuts.

[0018] By adopting the above technical solution, the seat body is designed with multiple sub-seat units, and it can be further disassembled after the filter is removed, which is convenient for replacing the filter screen.

[0019] The further setting of the present utility model is that: a sealing ring is provided between two adjacent sub-seat units.

[0020] By adopting the above technical solution, the sealing ring is used to improve the sealing performance between two sub-seat units and avoid air leakage.

[0021] The further setting of the present utility model is that: the bottom wall of the channel forms an inclined surface, and along the gas flow direction, the lower end of the inclined surface is located upstream of the upper end of the inclined surface.

[0022] By adopting the above technical solution, the tar flows along the inclined inclined surface, and the flow direction is opposite to the gas flow direction, reducing its contact with the solenoid valve.

[0023] The further setting of the present utility model is that: a receiving groove is formed at the lower end of the inclined surface, and the receiving groove is lower than the inner wall of the gas supply pipe section.

[0024] By adopting the above technical solution, the receiving groove is used to receive the tar, which is convenient for one-time cleaning treatment after the filter is removed.

[0025] The beneficial effect of the present utility model is that: the present utility model uses refrigerant as the medium, utilizes the heat of the burner body to preheat the biomass gas, reduces heat loss, and at the same time improves the filter structure, uses multiple filter screens one by one, and effectively extends the disassembly cycle of the filter. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a structural schematic diagram of the present utility model.

[0028] Figure 2It is a schematic diagram of the filter screen of the present utility model in a filtering state.

[0029] Figure 3 It is a schematic diagram of the filter screen of the present utility model in an unfiltered state Figure 1 .

[0030] Figure 4 It is a schematic diagram of the filter screen of the present utility model in an unfiltered state Figure 2 .

[0031] Figure 5 It is a schematic diagram of the positional relationship among the channels, inclined planes, and receiving grooves of the present utility model.

[0032] In the figure, 1 is the burner body; 2 is the biomass gas pipeline; 21 is the gas supply section; 22 is the filter; 221 is the seat body; 2211 is the sub-seat unit; 222 is the channel; 2221 is the inclined plane; 2222 is the receiving groove; 223 is the operating rod; 224 is the filter screen; 23 is the solenoid valve; 24 is the heat exchange pipe section; 25 is the intake pipe section; 3 is the first heat exchanger; 4 is the second heat exchanger; 5 is the bypass pipeline; 51 is the pump; 6 is the opening and closing valve; 7 is the exhaust pipe; 71 is the pressure relief valve; 8 is the drain pipe; 81 is the drain valve; 9 is the electric actuator. Specific embodiments

[0033] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] A multi-channel burner with a cleaning function, such as Figures 1 to 5As shown in the figure, it includes a burner body 1 and a biomass gas pipeline 2. The burner body 1 is provided with a first heat exchanger 3. The biomass gas pipeline 2 includes a gas supply section 21, a filter 22, a solenoid valve 23, a heat exchange pipe section 24, and an air inlet section 25. A second heat exchanger 4 is installed on the heat exchange pipe section 24. The outlet of the first heat exchanger 3 and the inlet of the second heat exchanger 4, as well as the inlet of the first heat exchanger 3 and the outlet of the second heat exchanger 4, are connected by pipelines. A circulation pipeline is formed between the first heat exchanger 3 and the second heat exchanger 4, and a refrigerant is filled in the circulation pipeline. The second heat exchanger 4 is higher than the first heat exchanger 3. The filter 22 includes a seat body 221, a channel 222 formed in the seat body 221, and a number of operating rods 223 rotatably arranged on the side wall of the seat body 221. Each operating rod 223 is fixed with a filter net 224. The contour of the filter net 224 is circular and is located in the channel 222. A plurality of filter nets 224 are arranged in sequence along the axial direction of the channel 222. The operating rod 223 is connected to an electric actuator 9, and the electric actuator 9 is used to control the rotation of the operating rod 223.

[0035] Further, the circulation pipeline includes a bypass pipeline 5, and a pump 51 is installed on the bypass pipeline 5.

[0036] Further, the circulation pipeline is provided with an opening and closing valve 6. The opening and closing valve 6 is arranged in parallel with the pump 51.

[0037] Further, an exhaust pipe 7 and a pressure relief valve 71 are provided at the upper end of the circulation pipeline, and a drain pipe 8 and a drain valve 81 are installed below the circulation pipeline.

[0038] Further, the first heat exchanger 3 includes a copper pipe provided on the outer wall of the burner body 1.

[0039] Further, connection flanges are provided at both ends of the filter 22.

[0040] Further, the seat body 221 is divided into multiple segmental seat units 2211. Each segmental seat unit 2211 corresponds to an operating rod 223 and a filter net 224. Adjacent two segmental seat units 2211 are connected by bolts and nuts.

[0041] Further, a sealing ring is provided between two adjacent segmental seat units 2211.

[0042] Further, an inclined surface 2221 is formed on the bottom wall of the channel 222. Along the gas flow direction, the lower end of the inclined surface 2221 is located upstream of the upper end of the inclined surface 2221.

[0043] Further, a receiving groove 2222 is formed at the lower end of the inclined surface 2221, and the receiving groove 2222 is lower than the inner wall of the gas supply section 21.

[0044] Working principle: Biomass gas sequentially passes through the gas supply pipe section 21, the filter 22, the solenoid valve 23, the heat exchange pipe section 24, and the intake pipe section 25 and then enters the burner body 1, where it burns. The utility model uniquely uses the first heat exchanger 3 and the second heat exchanger 4 and pipes to form a circulation pipeline. The refrigerant absorbs heat in the first heat exchanger 3 and becomes gaseous, rises to the second heat exchanger 4, and exchanges heat with the biomass gas in the heat exchange pipe section 24 in the second heat exchanger 4. Using the refrigerant as a medium, the heat at the burner body 1 is used to preheat the biomass gas, making full use of the heat energy and reducing heat loss.

[0045] Meanwhile, the utility model improves the structure of the filter 22. Along the flowing direction of the biomass gas, from the upstream to the downstream, the staff only needs to regularly rotate the operating rod 223 to successively use the filter net 224, that is, the upstream filter net 224 is used first, and after being used for a period of time, the downstream filter net 224 is used, which can significantly extend the replacement cycle of the filter net 224.

Claims

1. A multi-channel burner with cleaning function, characterized in that: The invention comprises a burner body (1) and a biomass gas pipeline (2), wherein the burner body (1) is provided with a first heat exchanger (3), the biomass gas pipeline (2) comprises a gas supply pipe section (21), a filter (22), a solenoid valve (23), a heat exchange pipe section (24), and an air intake pipe section (25), the heat exchange pipe section (24) is provided with a second heat exchanger (4), the outlet of the first heat exchanger (3) and the inlet of the second heat exchanger (4) are connected to each other via a pipeline, and the inlet of the first heat exchanger (3) and the outlet of the second heat exchanger (4) are connected to each other via a pipeline. A circulation pipeline is formed between the second heat exchanger (4), and the circulation pipeline is filled with refrigerant. The second heat exchanger (4) is higher than the first heat exchanger (3). The filter (22) includes a seat body (221), a channel (222) formed in the seat body (221), and a plurality of operating rods (223) rotatably arranged on the side wall of the seat body (221). Each of the operating rods (223) is fixed with a filter screen (224). The filter screen (224) has a circular outline and is located in the channel (222). The plurality of filter screens (224) are distributed in sequence along the axial direction of the channel (222).

2. A multi-channel burner with cleaning function according to claim 1, characterized in that: The circulation pipeline comprises a bypass pipeline (5), and a pump (51) is installed on the bypass pipeline (5).

3. A multi-channel burner with cleaning function according to claim 2, characterized in that: The circulation pipeline is provided with an on-off valve (6), and the on-off valve (6) is arranged in parallel with the pump (51).

4. The multi-channel burner with cleaning function according to claim 1, characterized in that: An exhaust pipe (7) and a pressure relief valve (71) are provided at the upper end of the circulation pipeline, and a drain pipe (8) and a drain valve (81) are installed at the lower end of the circulation pipeline.

5. The multi-channel burner with cleaning function according to claim 1, characterized in that: The first heat exchanger (3) comprises a copper tube arranged on the outer wall of the burner body (1).

6. The multi-channel burner with cleaning function according to claim 1, characterized in that: The filter (22) is provided with connecting flanges at both ends.

7. The multi-channel burner with cleaning function according to claim 1, characterized in that: The seat body (221) is divided into a plurality of sub-seat units (2211), each of the sub-seat units (2211) corresponds to a joystick (223) and a filter screen (224), and two adjacent sub-seat units (2211) are connected via bolts and nuts.

8. The multi-channel burner with cleaning function according to claim 7, characterized in that: A sealing ring is provided between two connected sub-seat units (2211).

9. The multi-channel burner with cleaning function according to claim 1, characterized in that: The bottom wall of the channel (222) is formed with an inclined surface (2221), and along the gas flow direction, the lower end of the inclined surface (2221) is located upstream of the upper end of the inclined surface (2221).

10. The multi-channel burner with cleaning function according to claim 9, characterized in that: A receiving groove (2222) is formed at the lower end of the inclined surface (2221), and the receiving groove (2222) is lower than the inner wall of the air supply pipe section (21).

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