A heating furnace flue

Abstract

This utility model discloses a heating furnace flue, including a furnace body. A gas pipe is connected to the center of the upper end of the furnace body. An igniter is inserted into the right side of the upper end of the furnace body, with the lower end of the igniter located below the gas pipe. An exhaust pipe is provided on the upper right side of the gas pipe. A flue heat recovery component is provided between the furnace body and the exhaust pipe. A dust separation and cleaning component is provided on the outer side of the upper side of the flue heat recovery component. The flue heat recovery component includes an insulated inner liner, a flue gas guide hole, and a flue gas guide pipe. An insulated inner liner is provided inside the furnace body. This utility model constructs a two-stage heat recovery structure through the insulated flue formed by the insulated inner liner and the furnace body, and the preheating flue formed by the gas pipe and the flue gas guide pipe. This can fully utilize the waste heat of the exhaust gas while insulating the interior of the furnace body and preheating the introduced gas. This reduces the loss of combustion heat and increases the initial temperature of the gas, thereby improving the overall combustion efficiency and energy utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of heating furnace flue, and in particular to a heating furnace flue. Background Technology

[0002] Currently, traditional heating furnace flue systems typically only fulfill the basic function of exhaust gas emission, and their design often fails to adequately consider the comprehensive utilization of energy and emission control. In actual operation, the large amount of waste heat carried by the high-temperature exhaust gas is usually directly discharged into the atmosphere, resulting in serious energy waste and increased operating costs.

[0003] Furthermore, the gas is not preheated before entering the furnace, resulting in a low initial temperature that not only reduces combustion efficiency but may also affect combustion stability. On the other hand, the exhaust gas typically contains particulate matter from incomplete combustion. If these particles directly enter the exhaust duct, they will not only exacerbate duct wear and blockage risks but also increase the difficulty and cost of subsequent exhaust gas treatment.

[0004] To address the aforementioned issues, this patent proposes a comprehensive flue gas system solution that integrates waste heat recovery, gas preheating, and flue gas treatment. Utility Model Content

[0005] The main purpose of this utility model is to propose a heating furnace flue that aims to solve the problems mentioned in the background art, such as the lack of waste heat recovery and waste gas dust treatment capabilities in traditional heating furnace flues, which leads to energy waste and difficulties in subsequent waste gas treatment.

[0006] To address the aforementioned problems, this utility model proposes a heating furnace flue, including a furnace body. A gas pipe is connected to the center of the upper end of the furnace body. An igniter is inserted into the right side of the upper end of the furnace body, with the lower end of the igniter located below the gas pipe. An exhaust pipe is provided on the upper side of the right end of the gas pipe. A flue heat recovery assembly is provided between the furnace body and the exhaust pipe. A dust separation and cleaning assembly is provided on the outer side of the upper side of the flue heat recovery assembly.

[0007] In one embodiment, the flue heat recovery assembly includes an insulated inner liner, a flue gas duct, and a flue gas pipe. The furnace body is provided with an insulated inner liner, which is connected to the inner wall of the lower end of the furnace body.

[0008] In one embodiment, an insulated flue is formed between the insulated inner liner and the inner wall of the furnace body, and the lower end of the gas pipe passes through the interior of the upper center of the furnace body and is connected to the upper center of the insulated inner liner.

[0009] In one embodiment, the lower end of the heat-insulating inner liner is provided with multiple smoke guide holes, and all of the multiple smoke guide holes are connected to the heat-insulating flue. A smoke guide pipe is connected to the center of the upper end of the furnace body.

[0010] In one embodiment, the flue is located outside the gas pipe and forms a preheating flue between it and the outer wall of the gas pipe, and the preheating flue is connected to the insulated flue.

[0011] In one embodiment, a hollow spiral baffle is provided inside the upper side of the preheating flue, and the inner end of the spiral baffle extends into the gas pipe.

[0012] In one embodiment, the smoke and dust separation and cleaning assembly includes a collection hood, a dust discharge hole, and a brush head. The smoke guide pipe is externally connected to a downward-facing collection hood, and the outer wall of the smoke guide pipe has multiple dust discharge holes.

[0013] In one embodiment, a plurality of dust discharge holes are connected between the collection hood and the preheating flue, the plurality of dust discharge holes are located between the spiral gaps of the spiral baffles, and a connecting flange is connected to the lower external end of the collection hood.

[0014] In one embodiment, a sealing ring is bolted to the lower end of the connecting flange, and multiple brush rods are connected to the upper end of the sealing ring, with all brush rods located inside the collection hood.

[0015] In one embodiment, a brush holder is connected to the upper end of a plurality of brush rods, and the brush holder is located at the top of the inner cavity of the collection hood. Brush heads are connected to both the inner and outer ends of the brush holder, and the two brush heads are respectively attached to the outer wall of the smoke guide tube and the inner wall of the collection hood.

[0016] Beneficial effects: 1. This utility model constructs a two-stage heat recovery structure by forming an insulated flue between the insulated inner liner and the furnace body, and a preheating flue between the gas pipe and the flue pipe. This structure can make full use of the waste heat of the exhaust gas while insulating the interior of the furnace body and preheating the introduced gas. This reduces the loss of combustion heat and increases the initial temperature of the gas, thereby improving the overall combustion efficiency and energy utilization rate.

[0017] 2. This utility model sets a hollow spiral baffle in the preheating flue and extends its inner end into the gas pipe, which can increase the flow path and residence time of the exhaust gas in the flue, and at the same time increase the heat exchange contact area between the exhaust gas and the gas pipe, thereby improving the heat exchange efficiency and the preheating efficiency and effect of the exhaust gas on the gas.

[0018] 3. This utility model utilizes the centrifugal force generated by the spiral flue to throw dust particles through the dust discharge holes on the flue pipe wall into the external collection hood, achieving efficient dynamic separation and collection of dust, reducing the dust content in the exhaust gas, and reducing the difficulty of subsequent treatment. At the same time, it adopts a detachable sealing ring and connecting flange design, and integrates a cleaning component, so that while discharging accumulated dust, the inner wall of the collection hood and the outer wall of the inner pipe can be cleaned simultaneously, ensuring the convenience and thoroughness of cleaning, thereby maintaining the long-term efficient operation of the system. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a three-dimensional structural diagram of the heating furnace flue of this utility model; Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the heating furnace flue of this utility model; Figure 3 This is a schematic diagram of the gas pipe connection structure of this utility model; Figure 4 This is a schematic diagram of the smoke guide pipe connection structure of this utility model; Figure 5 This is a schematic diagram of the brush rod connection structure of this utility model.

[0021] The annotations in the attached figures are explained as follows: 1. Furnace body; 2. Gas pipe; 3. Igniter; 4. Exhaust pipe; 5. Insulated inner liner; 6. Smoke guide hole; 7. Smoke guide pipe; 8. Spiral baffle; 9. Collection hood; 10. Dust discharge hole; 11. Connecting flange; 12. Sealing ring; 13. Brush rod; 14. Brush base; 15. Brush head. Detailed Implementation

[0022] 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.

[0023] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] This utility model provides, for example Figures 1-5 The heating furnace flue shown includes a furnace body 1, with a gas pipe 2 connected to the center of the upper end of the furnace body 1. An igniter 3 is inserted into the upper right side of the furnace body 1, with the lower end of the igniter 3 located below the gas pipe 2. An exhaust pipe 4 is provided on the upper right side of the gas pipe 2. A flue heat recovery component is provided between the furnace body 1 and the exhaust pipe 4. A dust separation and cleaning component is provided on the upper exterior of the flue heat recovery component. During the operation of the heating furnace, gas is introduced into the furnace body 1 through the gas pipe 2 and ignited by the igniter 3, allowing the gas to burn inside the furnace body 1. The exhaust gas generated by the combustion is introduced into the exhaust pipe 4 through the flue heat recovery component and discharged for treatment. The flue heat recovery component can recover and utilize the residual heat in the exhaust gas to keep the furnace body 1 warm and preheat the gas inside the gas pipe 2. In addition, the flue heat recovery component can remove dust from the exhaust gas through the dust separation and cleaning component, reducing the difficulty of subsequent exhaust gas treatment.

[0027] Preferably, the flue heat recovery assembly includes an insulated inner liner 5, flue gas guide holes 6, and a flue gas pipe 7. The insulated inner liner 5 is installed inside the furnace body 1 and is connected to the lower inner wall of the furnace body 1, forming an insulated flue between the inner liner 5 and the inner wall of the furnace body 1. The lower end of the gas pipe 2 passes through the center of the upper end of the furnace body 1 and connects to the center of the upper end of the insulated inner liner 5. Multiple flue gas guide holes 6 are provided at the lower end of the insulated inner liner 5, and all of these holes 6 connect to the insulated flue. A flue gas pipe 7 is connected to the center of the upper end of the furnace body 1. The flue gas pipe 7 is located outside the gas pipe 2 and connects to the gas pipe 7. A preheating flue is formed between the outer walls of the gas pipe 2 and the insulation flue. The preheating flue is connected to the insulation flue. A hollow spiral baffle 8 is installed inside the upper side of the preheating flue, and the inner end of the spiral baffle 8 extends into the interior of the gas pipe 2. During the heat recovery process of the exhaust gas, the gas introduced into the furnace body 1 is burned inside the insulation inner liner 5 and is introduced into the insulation flue between the insulation inner liner 5 and the furnace body 1 through multiple smoke guide holes 6. Since the insulation flue is located outside the insulation inner liner 5, the residual heat in the exhaust gas can insulate the interior of the insulation inner liner 5 and reduce the loss of combustion heat.

[0028] Furthermore, when the exhaust gas flows into the preheating flue between the gas pipe 2 and the flue duct 7, the exhaust gas can exchange heat with the gas inside the gas pipe 2 through the gas pipe 2 and the spiral baffle 8, thereby preheating the gas and increasing the temperature of the gas entering the furnace body 1, thus improving the combustion efficiency of the gas. Since the spiral baffle 8 can increase the path length and flow time of the exhaust gas inside the preheating flue, and the spiral baffle 8 protrudes inside the gas pipe 2, the spiral baffle 8 can increase the heat exchange area between the exhaust gas and the gas, thereby improving the preheating efficiency.

[0029] Preferably, the dust separation and cleaning assembly includes a collection hood 9, dust discharge holes 10, and brush heads 15. The collection hood 9, with its opening facing downwards, is connected to the outside of the flue pipe 7. Multiple dust discharge holes 10 are formed on the outer wall of the flue pipe 7, and these holes connect the collection hood 9 to the preheating flue. The multiple dust discharge holes 10 are located between the spiral gaps of the spiral baffles 8. A connecting flange 11 is connected to the lower end of the collection hood 9. A sealing ring 12 is bolted to the lower end of the connecting flange 11. Multiple brush rods 13 are connected to the upper end of the sealing ring 12, and all brush rods 13 are located inside the collection hood 9. Brush holders are connected to the upper ends of the brush rods 13. 14, and the brush seat 14 is located at the top of the inner cavity of the collection hood 9. Both the inner and outer ends of the brush seat 14 are connected to brush heads 15, and the two brush heads 15 are respectively attached to the outer wall of the flue pipe 7 and the inner wall of the collection hood 9. During the process of removing dust from the exhaust gas, since the spiral baffle 8 is spirally arranged, the exhaust gas will generate centrifugal force when passing through the preheating flue. The centrifugal force will throw the dust in the exhaust gas to the inner wall of the flue pipe 7. At this time, the dust thrown to the inner wall of the flue pipe 7 can enter the collection hood 9 through multiple dust discharge holes 10 and be collected by the collection hood 9, thereby removing the dust in the exhaust gas.

[0030] In addition, when there is a lot of smoke and dust collected inside the collection hood 9, the connecting flange 11 and the sealing ring 12 can be separated by unscrewing the bolts, so that the collected smoke and dust can be discharged through the lower end of the collection hood 9. At the same time, during the process of discharging the smoke and dust, the sealing ring 12 can drive the brush seat 14 and the brush head 15 to move up and down between the smoke guide pipe 7 and the collection hood 9 through multiple brush rods 13, and clean the outer wall of the smoke guide pipe 7 and the inner wall of the collection hood 9 through the brush heads 15 at both ends of the brush seat 14, so as to ensure that the smoke and dust are cleaned.

[0031] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A heating furnace flue, characterized by, The furnace includes a furnace body (1), a gas pipe (2) is connected to the center of the upper end of the furnace body (1), an igniter (3) is inserted into the upper right side of the furnace body (1), and the lower end of the igniter (3) is located below the gas pipe (2). A flue pipe (4) is provided on the upper right side of the gas pipe (2). A flue heat recovery assembly is provided between the furnace body (1) and the flue pipe (4). A flue heat recovery assembly is provided on the upper exterior of the flue heat recovery assembly. A dust separation and cleaning assembly is provided.

2. A furnace flue as claimed in claim 1, wherein The flue heat recovery assembly includes an insulated inner liner (5), a flue gas duct (6) and a flue gas pipe (7). The furnace body (1) is provided with an insulated inner liner (5), and the insulated inner liner (5) is connected to the inner wall of the lower end of the furnace body (1).

3. A heating furnace flue as described in claim 2, characterized in that, The heat-insulating inner liner (5) forms a heat-insulating flue between the inner wall of the furnace body (1) and the lower end of the gas pipe (2) passes through the interior of the upper center of the furnace body (1) and is connected to the upper center of the heat-insulating inner liner (5).

4. A heating furnace flue as described in claim 3, characterized in that, The lower end of the heat-insulating inner liner (5) is provided with multiple smoke guide holes (6), and the multiple smoke guide holes (6) are all connected to the heat-insulating flue. The center of the upper end of the furnace body (1) is connected to a smoke guide pipe (7).

5. A heating furnace flue as described in claim 4, characterized in that, The flue (7) is located outside the gas pipe (2) and forms a preheating flue between it and the outer wall of the gas pipe (2). The preheating flue is connected to the heat-insulating flue.

6. A heating furnace flue as described in claim 5, characterized in that, A hollow spiral baffle (8) is provided inside the upper side of the preheating flue, and the inner end of the spiral baffle (8) extends into the gas pipe (2).

7. A heating furnace flue as described in claim 6, characterized in that, The smoke and dust separation and cleaning assembly includes a collection hood (9), a dust discharge hole (10) and a brush head (15). The smoke guide pipe (7) is connected to a collection hood (9) with its opening facing downwards. Multiple dust discharge holes (10) are provided on the outer wall of the smoke guide pipe (7).

8. A heating furnace flue as described in claim 7, characterized in that, Multiple dust discharge holes (10) are connected between the collection hood (9) and the preheating flue. The multiple dust discharge holes (10) are located between the spiral gaps of the spiral baffle (8). A connecting flange (11) is connected to the lower external end of the collection hood (9).

9. A heating furnace flue as described in claim 8, characterized in that, The lower end of the connecting flange (11) is connected to a sealing ring (12) by bolts. The upper end of the sealing ring (12) is connected to multiple brush rods (13), and the multiple brush rods (13) are all located inside the collection cover (9).

10. A heating furnace flue as described in claim 9, characterized in that, Multiple brush rods (13) are connected to brush seats (14) at their upper ends, and the brush seats (14) are located at the top of the inner cavity of the collection cover (9). Both the inner and outer ends of the brush seats (14) are connected to brush heads (15), and the two brush heads (15) are respectively attached to the outer wall of the smoke guide pipe (7) and the inner wall of the collection cover (9).

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