Discharge system of fully premixed combustion boiler

Abstract

The utility model relates to the technical field of boilers, in particular to a fully premixed combustion boiler discharge system which comprises a boiler body, an upper boiler barrel is installed on the upper portion in the boiler body, a lower boiler barrel is installed on the lower portion in the boiler body, one side of the upper boiler barrel is connected with an upper collecting box, and one side of the lower boiler barrel is connected with a lower collecting box. A plurality of convection banks are connected between the upper boiler barrel and the lower boiler barrel, a burner is mounted at one end of the boiler body, a connecting flue is mounted at the other end of the boiler body, an energy saver is connected to the outer end of the connecting flue, and a condenser is connected to the outer end of the energy saver. In the discharge system of the fully premixed combustion boiler, by adopting a fully premixed combustion technology, fuel and air are fully mixed before combustion to form a uniform combustible mixture, so that the combustion process is more sufficient and stable, and the combustion efficiency is remarkably improved. The energy saver and the condenser in the system effectively recover heat energy in the flue gas and convert the heat energy into available energy, so that the energy waste is reduced, and the overall energy consumption of the boiler is reduced.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, and more specifically, to a fully premixed combustion boiler emission system. Background Technology

[0002] In the field of boiler technology, traditional boiler combustion systems often suffer from problems such as low combustion efficiency, high energy consumption, and significant pollutant emissions. These problems not only affect the boiler's operating efficiency but also exacerbate environmental pollution, failing to meet current environmental protection requirements for energy conservation and emission reduction.

[0003] Traditional boilers often employ diffusion combustion, which is prone to incomplete combustion, leading to low combustion efficiency and the generation of large amounts of harmful gases such as nitrogen oxides and carbon monoxide, causing environmental pollution. Furthermore, traditional boilers typically lack effective heat recovery systems, resulting in the direct release of large quantities of high-temperature flue gas into the atmosphere, thus wasting energy.

[0004] Therefore, there is an urgent need for a boiler combustion system that can improve combustion efficiency, reduce energy consumption, and reduce pollutant emissions. Utility Model Content

[0005] The purpose of this invention is to provide a fully premixed combustion boiler emission system to solve the problem mentioned in the background art that the emission system of traditional boilers usually lacks an effective heat recovery device, which causes a large amount of high-temperature flue gas generated during boiler operation to be directly emitted into the atmosphere, resulting in energy waste.

[0006] To achieve the above objectives, this utility model provides a fully premixed combustion boiler emission system, including a furnace body. An upper boiler drum is installed at the top inside the furnace body, and a lower boiler drum is installed at the bottom inside the furnace body. An upper header is connected to one side of the upper boiler drum, and a lower header is connected to one side of the lower boiler drum. A plurality of convection tube bundles are connected between the upper and lower boiler drums. A burner is installed at one end of the furnace body, and a connecting flue is installed at the other end of the furnace body. An economizer is connected to the outer end of the connecting flue, a condenser is connected to the outer end of the economizer, and a chimney is connected to the outer end of the condenser.

[0007] Preferably, the inner wall of the furnace body is equipped with a front water-cooled wall, the upper end of which is connected to the upper header, and the lower end of which is connected to the lower header.

[0008] Preferably, the bottom hot air outlet of the condenser is connected to the burner via a hot air duct.

[0009] Preferably, a mixer is installed on the back of the burner, and a horizontal air inlet pipe is connected to the back of the mixer. A gas inlet pipe is connected to one side of the air inlet pipe, and a hot air inlet is provided on the bottom side of the air inlet pipe. The hot air inlet is connected to the end of the hot air pipeline.

[0010] Preferably, the burner has a square combustion surface on its front side, and a plurality of combustion ports are provided on the combustion surface, which are arranged in a matrix.

[0011] Preferably, the convection tube bundles are arranged at equal intervals, and the front wall water-cooled walls are arranged at equal intervals.

[0012] Preferably, a fan is installed on the hot air duct, and the fan assists the hot air to enter the burner from the hot air duct.

[0013] Preferably, the outer wall of the furnace body is provided with a heat insulation layer.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In this fully premixed combustion boiler emission system, by adopting fully premixed combustion technology, fuel and air are fully mixed before combustion to form a uniform combustible mixture, making the combustion process more complete and stable, thereby significantly improving combustion efficiency.

[0016] The system's economizer and condenser effectively recover heat energy from flue gas, converting it into usable energy, reducing energy waste and lowering the boiler's overall energy consumption. The fully premixed combustion method reduces incomplete combustion, effectively lowering emissions of harmful gases such as nitrogen oxides and carbon monoxide, meeting current environmental protection requirements for energy conservation and emission reduction.

[0017] The equidistant arrangement of the convection tube bundles and the water-cooled front wall ensures more uniform heat transfer within the boiler, enhancing system stability and reliability. Hot air from the bottom of the condenser is returned to the burner via hot air ducts, achieving heat recovery and reuse, further improving energy efficiency. The insulation layer on the outer wall of the boiler effectively reduces heat loss, maintaining a high-temperature environment inside the boiler and improving its operating efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the burner structure in this utility model;

[0020] Figure 3 This is a schematic diagram of the front structure of the burner in this utility model;

[0021] The meanings of the labels in the diagram are as follows:

[0022] 1. Furnace body; 2. Upper drum; 3. Lower drum; 4. Upper header; 5. Lower header; 6. Convection tube bundle; 7. Front water-cooled wall; 8. Burner; 81. Mixer; 82. Air inlet pipe; 83. Gas inlet pipe; 84. Hot air inlet; 85. Combustion port; 9. Hot air pipeline; 91. Fan; 10. Connecting flue; 11. Eco-friendly device; 12. Condenser; 13. Chimney. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides a fully premixed combustion boiler emission system, such as Figures 1-3 As shown, the boiler includes a furnace body 1, an upper boiler drum 2 installed at the top inside the furnace body 1, and a lower boiler drum 3 installed at the bottom inside the furnace body 1. An upper header 4 is connected to one side of the upper boiler drum 2, and a lower header 5 is connected to one side of the lower boiler drum 3. Several convection tube bundles 6 connect the upper boiler drum 2 and the lower boiler drum 3. A burner 8 is installed at one end of the furnace body 1, and a connecting flue 10 is installed at the other end. An economizer 11 is connected to the outer end of the connecting flue 10, and a condenser 12 is connected to the outer end of the economizer 11. A chimney 13 is connected to the outer end of the condenser 12. Through a carefully designed structural layout, efficient and environmentally friendly boiler operation is achieved. The upper boiler drum 2 installed at the top and the lower boiler drum 3 installed at the bottom inside the furnace body 1, along with the several convection tube bundles 6 connecting them, constitute the main heat exchange structure of the boiler, effectively improving the heat transfer efficiency. The burner 8 installed at one end of the furnace body 1 ensures complete combustion of fuel, improving combustion efficiency. Meanwhile, at the other end of the furnace body 1, an energy-saving device 11, a condenser 12, and a chimney 13 are connected in sequence via a connecting flue 10, thereby realizing the recovery and reuse of flue gas heat energy and the purification and emission of flue gas. This design not only reduces energy waste and lowers the operating cost of the boiler, but also effectively reduces pollutant emissions, meets environmental protection requirements, and has significant economic and social benefits.

[0025] In this embodiment, a front water-cooled wall 7 is installed on the inner wall of the furnace body 1. The upper end of the front water-cooled wall 7 is connected to the upper header 4, and the lower end of the front water-cooled wall 7 is connected to the lower header 5. The installation of the front water-cooled wall 7 enhances the cooling effect of the furnace body 1 and effectively protects the furnace wall surface from the erosion of high-temperature flue gas. At the same time, the connection between the front water-cooled wall 7, the upper header 4, and the lower header 5 forms a complete water circulation system, which improves the heat transfer efficiency and ensures the stable operation of the boiler.

[0026] Specifically, the bottom hot air outlet of the condenser 12 is connected to the burner 8 via the hot air duct 9. The flue gas heat energy recovered by the condenser 12 is transferred to the burner 8 via the hot air duct 9, realizing the recovery and reuse of heat energy, improving the energy utilization rate of the boiler, and reducing energy consumption.

[0027] Furthermore, a mixer 81 is installed on the back of the burner 8, and a horizontal air inlet pipe 82 is connected to the back of the mixer 81. A gas inlet pipe 83 is connected to one side of the air inlet pipe 82, and a hot air inlet 84 is provided on the bottom side of the air inlet pipe 82. The hot air inlet 84 is connected to the end of the hot air duct 9. The design of the mixer 81 allows the air and gas to be fully mixed, forming a uniform combustible mixture, which improves combustion efficiency. The connection between the hot air inlet 84 and the hot air duct 9 further utilizes the recovered heat energy, enhancing the stability and efficiency of combustion.

[0028] Furthermore, the burner 8 has a square combustion surface on its front side, with several combustion ports 85 arranged in a matrix. The square combustion surface and the matrix arrangement of the combustion ports 85 ensure uniform combustion of fuel, improve combustion efficiency, reduce incomplete combustion, and lower pollutant emissions.

[0029] Furthermore, the convection tube bundles 6 and the front water-cooled walls 7 are arranged at equal intervals. The equal-interval arrangement of the convection tube bundles 6 and the front water-cooled walls 7 makes the heat conduction inside the boiler more uniform, improves the heat transfer efficiency, and enhances the stability and reliability of the boiler.

[0030] Furthermore, a fan 91 is installed on the hot air duct 9, which assists the hot air in entering the burner 8 from the hot air duct 9. The installation of the fan 91 provides the power for the flow of hot air, ensuring that the hot air can smoothly enter the burner 8 from the hot air duct 9, thereby improving the efficiency of heat energy recovery and reuse.

[0031] Furthermore, the outer wall of the furnace body 1 is equipped with an insulation layer. This insulation layer is made of asbestos roofing material, effectively reducing heat loss from the outer wall of the furnace body 1, maintaining a high-temperature environment inside the boiler, improving boiler operating efficiency, and reducing energy consumption. At the same time, the insulation layer also protects the outer wall of the furnace body 1, extending the boiler's service life.

[0032] In operation, the fully premixed combustion boiler emission system of this invention first introduces fuel (such as natural gas) into the mixer 81 through the gas inlet pipe 83. Air then enters the mixer 81 through the air inlet pipe 82. The flue gas heat energy recovered by the condenser 12 is transferred to the hot air inlet 84 through the hot air duct 9 and enters the mixer 81. Inside the mixer 81, the fuel, air, and recovered heat energy are thoroughly mixed to form a homogeneous combustible mixture.

[0033] The combustible mixture is ejected from the combustion port 85 of the burner 8 and combusted in the combustion chamber. The combustion surface of the burner 8 is designed to be square, and the combustion ports 85 are arranged in a matrix to ensure uniform combustion of the fuel. The heat generated during combustion is transferred to the water in the boiler through the upper drum 2, the lower drum 3, and the convection tube bundle 6 to produce steam or hot water.

[0034] The flue gas produced by combustion enters the economizer 11 through the connecting flue 10. The economizer 11 recovers some of the heat energy in the flue gas, reducing its temperature. The flue gas then enters the condenser 12, where it further recovers heat energy and condenses water vapor into water, releasing latent heat. The condensed flue gas is then discharged into the atmosphere through the chimney 13.

[0035] The front water-cooled wall 7 installed on the inner wall of the furnace body 1 is connected to the boiler water circulation system through the upper header 4 and the lower header 5, absorbing heat inside the furnace body and protecting the furnace wall from the erosion of high-temperature flue gas. The insulation layer on the outer wall of the furnace body 1 is made of asbestos tile material, which effectively reduces heat loss, maintains the high-temperature environment inside the boiler, improves boiler operating efficiency, and reduces energy consumption.

[0036] Fan 91 is installed on hot air duct 9 to provide power for the flow of hot air, ensuring that the hot air recovered by condenser 12 can smoothly enter burner 8. After entering burner 8, the hot air mixes with fuel and air, further improving combustion efficiency and stability.

[0037] Finally, it should be noted that the electronic components in the energy-saving device 11, condenser 12, etc. in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order between each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fully premixed combustion boiler emission system, comprising a boiler body (1), characterized in that: An upper boiler drum (2) is installed at the top inside the furnace body (1), and a lower boiler drum (3) is installed at the bottom inside the furnace body (1). An upper header (4) is connected to one side of the upper boiler drum (2), and a lower header (5) is connected to one side of the lower boiler drum (3). Several convection tube bundles (6) are connected between the upper boiler drum (2) and the lower boiler drum (3). A burner (8) is installed at one end of the furnace body (1), and a connecting flue (10) is installed at the other end of the furnace body (1). An energy saver (11) is connected to the outer end of the connecting flue (10), and a condenser (12) is connected to the outer end of the energy saver (11). A chimney (13) is connected to the outer end of the condenser (12).

2. The fully premixed combustion boiler emission system according to claim 1, characterized in that: The inner wall of the furnace body (1) is equipped with a front water-cooled wall (7), the upper end of the front water-cooled wall (7) is connected to the upper header (4), and the lower end of the front water-cooled wall (7) is connected to the lower header (5).

3. The fully premixed combustion boiler emission system according to claim 1, characterized in that: The bottom hot air outlet of the condenser (12) is connected to the burner (8) via a hot air duct (9).

4. The fully premixed combustion boiler emission system according to claim 3, characterized in that: A mixer (81) is installed on the back of the burner (8), and a horizontal air inlet pipe (82) is connected to the back of the mixer (81). A gas inlet pipe (83) is connected to one side of the air inlet pipe (82), and a hot air inlet (84) is provided on the bottom side of the air inlet pipe (82). The hot air inlet (84) is connected to the end of the hot air pipeline (9).

5. The fully premixed combustion boiler emission system according to claim 1, characterized in that: The burner (8) has a square combustion surface on its front side, and a number of combustion ports (85) are provided on the combustion surface, which are arranged in a matrix.

6. The fully premixed combustion boiler emission system according to claim 2, characterized in that: The convection tube bundle (6) is arranged at equal intervals, and the front wall water-cooled wall (7) is arranged at equal intervals.

7. The fully premixed combustion boiler emission system according to claim 3, characterized in that: A fan (91) is installed on the hot air duct (9), and the fan (91) assists hot air to enter the burner (8) from the hot air duct (9).

8. The fully premixed combustion boiler emission system according to claim 1, characterized in that: The outer wall of the furnace body (1) is provided with a heat insulation layer.

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