Energy-saving combustion machine with exhaust gas utilization

Abstract

This utility model relates to the field of drying equipment technology and discloses an energy-saving burner for utilizing waste gas. It includes a combustion host, a blower mounted on the combustion host, a heat exchanger mounted on the combustion host, and a flue gas duct mounted on the heat exchanger. The blower's inlet is connected to a three-way switching valve, with the other two ends of the valve referred to as connection end one and connection end two, respectively. Connection end one is connected to a pipe, and connection end two is open to the outside. Pipe one is connected to a heating chamber during use. This utility model can reintroduce the heat energy from the previously wasted waste gas into the combustion host to preheat the combustion air, thereby significantly increasing the temperature of the combustion air.

Description

Technical Field

[0001] This utility model relates to the field of tobacco curing equipment technology, specifically to an energy-saving burner that realizes the utilization of waste gas. Background Technology

[0002] During the operation of biomass drying equipment, the high-temperature flue gas generated by the combustion device exchanges heat with the circulating air in the heating chamber, and high-temperature exhaust gas with a temperature between 80 and 180°C is discharged from the chimney pipe connected to the combustion device. Simultaneously, during material drying, the drying chamber releases high-temperature, high-humidity exhaust gas with a temperature range of 40 to 70°C to remove moisture. However, currently common burner structures cannot effectively recover the residual heat from the flue gas emitted from the combustion device and the humid air discharged from the drying chamber. This means that a large amount of heat energy contained in the exhaust gas is wasted, resulting in low fuel thermal energy utilization, which is detrimental to energy conservation and emission reduction, and does not meet environmental protection requirements. This design, lacking an effective energy recovery mechanism, not only increases energy consumption costs but also imposes an unnecessary burden on the environment to some extent. Therefore, improving the existing burner structure to achieve effective utilization of this residual heat is of great significance for improving energy efficiency and promoting environmental protection. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an energy-saving burner that realizes the utilization of waste gas.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] An energy-saving burner for utilizing waste gas includes a combustion host, a blower mounted on the combustion host, a heat exchanger mounted on the combustion host, and a flue gas duct mounted on the heat exchanger; the blower's inlet end is connected to a three-way switching valve, the other two ends of which are respectively referred to as connection end one and connection end two; connection end one is connected to a pipe one, and connection end two is connected to the outside; the pipe one is connected to the heating chamber during use.

[0006] Preferably, a second pipe is connected to the second connection end, and the second pipe is connected to the smoke exhaust pipe when in use.

[0007] Preferably, the three-way switching valve is an electric valve.

[0008] Preferably, the three-way switching valve is a manual valve.

[0009] Preferably, the pipe is an insulated pipe.

[0010] Preferably, the second pipe is an insulated pipe.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] This invention incorporates a waste gas recovery mechanism into the blower, achieving effective recovery and reuse of waste gas through this innovative design. Specifically, the device can reintroduce the heat energy from the previously wasted waste gas into the combustion engine to preheat the combustion air, thereby significantly increasing the temperature of the combustion air. This improvement not only promotes a more complete and stable combustion process for biomass fuel but also greatly improves combustion efficiency, enabling a biomass fuel combustion rate of up to 99%. Due to the dual improvement in combustion efficiency and heat recovery utilization, this not only saves 5% to 15% of biomass fuel and reduces operating costs but also reduces the amount of black smoke generated by incomplete combustion, making the entire combustion process more environmentally friendly. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a structural diagram of the installation of pipe 1.

[0015] Figure 2 This is the left view.

[0016] Figure 3 for Figure 2 Enlarged view of section B.

[0017] Figure 4 A cross-sectional view of the drying chamber and the heating chamber.

[0018] Figure 5 for Figure 4 Enlarged view of section C.

[0019] Figure 6 This is a schematic diagram of the structure of the second embodiment of the present invention during installation and use, showing the drying chamber and the heating chamber.

[0020] Figure 7 for Figure 6 Enlarged view of section D.

[0021] In the diagram: 1-combustion host, 2-blower, 3-heat exchanger, 4-exhaust pipe, 5-three-way switching valve, 6-connection end one, 7-connection end two, 8-pipe one, 9-pipe two, 20-heating chamber, 30-drying chamber. Detailed Implementation

[0022] To more clearly illustrate the purpose, technical solution, and advantages of this utility model, the technical solution of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments described below, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Example 1

[0024] As attached Figure 1-5 As shown, an energy-saving burner for utilizing waste gas includes a combustion host 1, a blower 2 installed on the combustion host 1, a heat exchanger 3 installed on the combustion host 1, and a flue gas duct 4 installed on the heat exchanger 3; the air inlet end of the blower 2 is connected to a three-way switching valve 5, and the other two ends of the three-way switching valve 5 are respectively called connection end one 6 and connection end two 7; a pipe one 8 is connected to connection end one 6, and connection end two 7 is connected to the outside; the pipe one 8 is connected to the heating chamber 20 when in use.

[0025] As a preferred technical solution in this embodiment, the three-way switching valve 5 is preferably an electric valve, which can be controlled by a PLC controller or the like to automatically control the mixing ratio of high-humidity and high-temperature gas with air in the heating chamber when the blower 2 is intake. Obviously, the three-way switching valve 5 can also be a manual valve for manual control.

[0026] As a preferred technical solution in this embodiment, both pipe 8 and pipe 9 are insulated pipes to reduce heat loss and further improve thermal energy utilization.

[0027] In this embodiment 1, the following control can be achieved by controlling the three-way switching valve 5:

[0028] 1. Complete recovery of high-humidity and high-temperature gas in the heating chamber. Its characteristics are that the recovered gas temperature is 40-70℃ and the oxygen content is 20%, resulting in more complete combustion of biomass in the furnace and good energy-saving effect. This method is suitable for situations that require rapid dehumidification and drying. At this time, only air enters the drying chamber 30 and no longer exhausts high-temperature and humid air. The high-temperature and humid air basically enters the combustion host 1 through pipe 18, maximizing the intake air temperature of the combustion host 1 and improving the thermal energy utilization rate.

[0029] 2. The mixture of high-humidity and high-temperature gas in the heating chamber and outside air is recovered. Its characteristics are that the temperature of the recovered gas is 40-50℃ and the moisture content of the recovered gas can be adjusted and maintained. This method is suitable for situations where humidity control is required.

[0030] Example 2

[0031] As attached Figure 6-7 As shown, an energy-saving burner for utilizing waste gas is provided, wherein a pipe 9 is connected to the connecting end 7, and the pipe 9 is connected to the exhaust pipe 4 during use. The rest is basically the same as in Embodiment 1.

[0032] In this embodiment 2, the working method is the same as that in embodiment 1. The difference is that when gas flows into both pipe 8 and pipe 9, it can simultaneously recover the high humidity and high temperature gas in the heating chamber 20 and the high temperature gas in the exhaust pipe 4. Its characteristics are that the temperature of the recovered gas is 60-90°C, the inlet temperature is higher, and the energy saving and environmental protection effects are better.

[0033] This invention can redirect the heat energy from previously wasted exhaust gas back into the combustion unit 1 to preheat the combustion air, thereby significantly increasing the temperature of the combustion air. This improvement not only promotes a more complete and stable combustion process for biomass fuel but also greatly improves combustion efficiency, enabling a biomass fuel combustion rate of up to 99%. Due to the dual improvement in combustion efficiency and heat recovery rate, this not only saves 5% to 15% of biomass fuel and reduces operating costs but also reduces the amount of black smoke generated by incomplete combustion, making the entire combustion process more environmentally friendly.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. For those skilled in the art, any modifications, equivalent substitutions, and improvements made to the technical solutions or some technical features described in the above specific embodiments within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. An energy-saving combustion machine realizing exhaust gas utilization, comprising a combustion main machine (1), a blower (2) installed on the combustion main machine (1), a heat exchanger (3) installed on the combustion main machine (1), and an exhaust pipe (4) installed on the heat exchanger (3); characterized in that, The blower (2) is connected to a three-way switching valve (5) at its air inlet end. The other two ends of the three-way switching valve (5) are called connection end one (6) and connection end two (7), respectively. Connection end one (6) is connected to pipe one (8), and connection end two (7) is connected to the outside. When in use, pipe one (8) is connected to the heating chamber (20).

2. The energy-saving burner for utilizing waste gas according to claim 1, characterized in that, The second connecting end (7) is connected to the second pipe (9), which is connected to the exhaust pipe (4) when in use.

3. The energy-saving burner for waste gas utilization according to claim 1 or 2, characterized in that, The three-way switching valve (5) is an electric valve.

4. The energy-saving burner for utilizing waste gas according to claim 1 or 2, characterized in that, The three-way switching valve (5) is a manual valve.

5. The energy-saving burner for utilizing waste gas according to claim 1 or 2, characterized in that, The first (8) pipe is an insulated pipe.

6. The energy-saving burner for utilizing waste gas according to claim 2, characterized in that, Pipeline 2 (9) is an insulated pipe.

Images