Recycling device for tail gas of enamel gas furnace

Abstract

The utility model discloses a recycling device for tail gas of an enamel gas furnace, which belongs to the technical field of furnace tail gas treatment and comprises a gas inlet pipe and a gas outlet pipe, the gas outlet pipe is fixedly mounted on the inner side of the gas inlet pipe, one end of the gas outlet pipe is rotatably connected with a preheating pipe, and the preheating pipe extends to the outer side of the gas inlet pipe; and the preheating structure comprises a fixing ring fixedly connected to the preheating pipe in a sleeving mode, the fixing ring is rotationally connected with a fixing support in a sleeving mode, the fixing support is fixedly connected with the inner wall of the air inlet pipe, and a motor is fixedly installed in the air inlet pipe. The preheating pipe rotates to drive tail gas on the inner side of the preheating pipe to rotate, so that the centrifugal effect is achieved, gas in the preheating pipe is closer to the inner wall of the preheating pipe, the heat exchange efficiency is improved, the energy utilization rate is increased, meanwhile, the cleaning structure is installed, the surface of the preheating pipe can be automatically cleaned, and the cleaning efficiency is improved. Therefore, impurities are prevented from adhering to the outer side of the preheating pipe.

Description

Technical Field

[0001] This utility model relates to the field of furnace and kiln exhaust gas treatment technology, and in particular to a device for recycling exhaust gas from enamel-lined gas furnaces and kilns. Background Technology

[0002] When the exhaust gas from a gas-fired furnace is discharged, the temperature of the exhaust gas is generally above 200 degrees Celsius. After the exhaust gas is discharged, the heat in the exhaust gas cannot be utilized, resulting in energy waste. At the same time, the excessively high temperature of the exhaust gas may cause danger. Therefore, a gas-fired furnace exhaust gas recycling device is needed.

[0003] Existing exhaust gas recovery devices mostly absorb the heat energy of exhaust gas by covering the exhaust pipe with the intake pipe. The heat recovery efficiency is low and it is not conducive to the recycling of energy. At the same time, after a long period of use, some debris can easily adhere to the outside of the exhaust pipe, which further reduces the heat exchange efficiency and is not conducive to the use of the device. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device for recycling exhaust gas from enamel-lined gas furnaces.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for recycling exhaust gas from an enamel-lined gas furnace includes:

[0007] An intake pipe and an exhaust pipe are provided. The exhaust pipe is fixedly installed inside the intake pipe. One end of the exhaust pipe is rotatably connected to a preheating pipe, which extends to the outside of the intake pipe.

[0008] The preheating structure includes a fixed ring fixedly sleeved on the preheating pipe, a fixed bracket rotatably sleeved on the fixed ring, the fixed bracket being fixedly connected to the inner wall of the air intake pipe, a motor being fixedly installed inside the air intake pipe, a rotating rod being fixedly connected to the output end of the motor, the rotating rod and the fixed ring being connected by a belt drive assembly, and a cleaning structure being installed inside the air intake pipe.

[0009] Preferably, the cleaning structure includes a connecting bracket fixedly connected to the inner wall of the intake pipe, a reciprocating screw rotatably connected between the connecting brackets, a screw slider mechanically fitted on the reciprocating screw, a cleaning ring fixedly connected to the screw slider, the cleaning ring being sleeved on the outside of the preheating pipe, one end of the reciprocating screw passing through the corresponding connecting bracket and fixedly connected to a connecting gear, and a fixed gear meshing with the connecting gear being fixedly sleeved on the preheating pipe.

[0010] Preferably, a scraper is fixedly installed on the inner wall of the cleaning ring, the scraper is in contact with the outer wall of the preheating pipe, and the side wall of the scraper has a chamfer.

[0011] Preferably, the preheating pipe is made entirely of copper, and a heat-insulating foam board is fixedly installed on the inner wall of the air inlet pipe, with the position of the heat-insulating foam board corresponding to that of the preheating pipe.

[0012] Preferably, multiple support rods are fixedly installed at the bottom end of the air intake pipe, and each support rod is fixedly connected to the air intake pipe with a shock-absorbing structure.

[0013] Preferably, a fan blade is fixedly installed on the fixing ring.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the rotation of the preheating tube drives the exhaust gas inside to rotate, thereby achieving a centrifugal effect, making the gas inside the preheating tube closer to the inner wall of the preheating tube, thereby improving the heat exchange efficiency, improving the energy utilization rate, and facilitating the recycling of energy. At the same time, a cleaning structure is installed to automatically clean the surface of the preheating tube, thereby preventing the adhesion of debris on the outside of the preheating tube, preventing the heat exchange efficiency of the device from decreasing, and facilitating the use of the device. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a device for recycling tail gas from an enamel-lined gas furnace, as proposed in this utility model.

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is a side-view three-dimensional structural diagram of a device for recycling tail gas from an enamel-lined gas furnace, as proposed in this utility model.

[0018] In the diagram: 1. Intake pipe, 2. Exhaust pipe, 3. Preheating pipe, 4. Fixing ring, 5. Fixing bracket, 6. Belt drive assembly, 7. Fan blade, 8. Fixing gear, 9. Connecting gear, 10. Connecting bracket, 11. Reciprocating lead screw, 12. Cleaning ring, 13. Lead screw slider, 14. Motor, 15. Rotating rod. Detailed Implementation

[0019] Reference Figures 1-3 A device for recycling exhaust gas from an enamel-lined gas furnace includes:

[0020] The intake pipe 1 and exhaust pipe 2 are both connected to the gas-fired furnace. The exhaust pipe 2 is fixedly installed inside the intake pipe 1. One end of the exhaust pipe 2 is rotatably connected to the preheating pipe 3, which extends to the outside of the intake pipe 1. The exhaust gas passes through the preheating pipe 3 from the exhaust pipe 2 before being discharged. Air enters the gas-fired furnace from the intake pipe 1, and the preheating pipe 3 preheats the air, thereby improving the energy utilization rate.

[0021] The preheating structure includes a fixed ring 4 fixedly sleeved on the preheating pipe 3, a fixed bracket 5 rotatably sleeved on the fixed ring 4, the fixed bracket 5 being fixedly connected to the inner wall of the air intake pipe 1, a motor 14 being fixedly installed inside the air intake pipe 1, a rotating rod 15 being fixedly connected to the output end of the motor 14, and the rotating rod 15 and the fixed ring 4 being connected by a belt drive assembly 6. A cleaning structure is installed inside the air intake pipe 1.

[0022] When the motor 14 is started, the output end of the motor 14 drives the rotating rod 15 to rotate. Under the action of the belt drive assembly 6, the fixed ring 4 rotates accordingly, driving the preheating tube 3 to rotate. When the preheating tube 3 rotates, the exhaust gas inside it will rotate accordingly, thereby achieving a centrifugal effect on the exhaust gas, making the exhaust gas closer to the tube wall of the preheating tube 3, improving the heat exchange efficiency between the exhaust gas and the air, which is conducive to the recycling of the exhaust gas heat energy, and also reduces the temperature of the exhaust gas, avoiding safety hazards caused by excessively high temperatures when the exhaust gas is emitted.

[0023] The cleaning structure includes a connecting bracket 10 fixedly connected to the inner wall of the intake pipe 1, a reciprocating screw 11 rotatably connected between the connecting brackets 10, a screw slider 13 mechanically engaged on the reciprocating screw 11, a cleaning ring 12 fixedly connected to the screw slider 13, the cleaning ring 12 being sleeved on the outside of the preheating pipe 3, the cleaning ring 12 and the preheating pipe 3 not being connected, the cleaning ring 12 cannot rotate due to the obstruction of the preheating pipe 3, that is, the screw slider 13 cannot rotate, one end of the reciprocating screw 11 passing through the corresponding connecting bracket 10 and fixedly connected to a connecting gear 9, and a fixed gear 8 meshing with the connecting gear 9 being fixedly sleeved on the preheating pipe 3;

[0024] When the preheating tube 3 rotates, the fixed gear 8, which is fixedly sleeved on the preheating tube 3, rotates accordingly, driving the connecting gear 9, which meshes with the fixed gear 8, to rotate together. When the connecting gear 9 rotates, the reciprocating screw 11, which is fixedly connected to it, rotates. Since the screw slider 13 cannot rotate, the rotation of the reciprocating screw 11 will cause the screw slider 13 to move back and forth, driving the cleaning ring 12 to move back and forth together to clean the surface of the preheating tube 3.

[0025] A scraper is fixedly installed on the inner wall of the cleaning ring 12. The scraper is in contact with the outer wall of the preheating tube 3, and the side wall of the scraper has a chamfer. The scraper moves with the cleaning ring 12 to scrape away the debris on the surface of the preheating tube 3.

[0026] The preheating pipe 3 is made entirely of copper, which has excellent thermal conductivity. A heat insulation foam board is fixedly installed on the inner wall of the air inlet pipe 1, and the position of the heat insulation foam board corresponds to that of the preheating pipe 3. The heat insulation foam board can prevent the loss of heat from the air in the air inlet pipe 1.

[0027] Multiple support rods are fixedly installed at the bottom of the intake pipe 1. Each support rod is fixedly connected to the intake pipe 1 with a shock-absorbing structure. The shock-absorbing structure adopts a commonly used damper assembly. The damper absorbs shock and dissipates energy to prevent the intake pipe 1 from being affected by external factors. A fan blade 7 is fixedly installed on the fixed ring 4. When the fixed ring 4 rotates, the fan blade 7 rotates accordingly, thereby accelerating the air entering the intake pipe 1.

[0028] In this invention, during operation, exhaust gas passes through preheating pipe 3 from exhaust pipe 2 before being discharged. Air enters the gas furnace from intake pipe 1, where preheating pipe 3 preheats the air, thus improving energy utilization. Simultaneously, motor 14 is started, and exhaust gas passes through preheating pipe 3 from exhaust pipe 2 before being discharged. Air enters the gas furnace from intake pipe 1, where preheating pipe 3 preheats the air, further improving energy utilization and lowering the exhaust gas temperature. This prevents safety hazards caused by excessively high exhaust gas temperatures, making the device safer and more reliable. Furthermore, when the fixed ring 4 rotates, the fan blades 7 rotate accordingly, accelerating the entry of air into intake pipe 1. When the preheating tube 3 rotates, the fixed gear 8, which is fixedly sleeved on the preheating tube 3, rotates accordingly, driving the connecting gear 9, which meshes with the fixed gear 8, to rotate as well. When the connecting gear 9 rotates, the reciprocating screw 11, which is fixedly connected to it, rotates. Since the screw slider 13 cannot rotate, the rotation of the reciprocating screw 11 will cause the screw slider 13 to move back and forth, driving the cleaning ring 12 to move back and forth as well. When the cleaning ring 12 moves, it will drive the scraper to move together, cleaning the surface of the preheating tube 3, removing the debris adhering to the surface of the preheating tube 3, and preventing it from remaining on the preheating tube 3 and affecting the heat exchange of the exhaust gas in the preheating tube 3 and the air in the intake pipe 2.

Claims

1. A device for recycling exhaust gas from an enamel-lined gas furnace, characterized in that, include: An intake pipe (1) and an exhaust pipe (2) are provided. The exhaust pipe (2) is fixedly installed inside the intake pipe (1). One end of the exhaust pipe (2) is rotatably connected to a preheating pipe (3), which extends to the outside of the intake pipe (1). The preheating structure includes a fixed ring (4) fixedly sleeved on the preheating pipe (3), a fixed bracket (5) rotatably sleeved on the fixed ring (4), the fixed bracket (5) being fixedly connected to the inner wall of the air intake pipe (1), a motor (14) being fixedly installed inside the air intake pipe (1), a rotating rod (15) being fixedly connected to the output end of the motor (14), the rotating rod (15) and the fixed ring (4) being connected by a belt drive assembly (6), and a cleaning structure being installed inside the air intake pipe (1).

2. The device for recycling exhaust gas from an enamel-lined gas furnace according to claim 1, characterized in that, The cleaning structure includes a connecting bracket (10) fixedly connected to the inner wall of the air intake pipe (1), a reciprocating screw (11) rotatably connected between the connecting brackets (10), a screw slider (13) mechanically fitted on the reciprocating screw (11), a cleaning ring (12) fixedly connected on the screw slider (13), the cleaning ring (12) being sleeved on the outside of the preheating pipe (3), one end of the reciprocating screw (11) passing through the corresponding connecting bracket (10) and fixedly connected to a connecting gear (9), and a fixed gear (8) meshing with the connecting gear (9) fixedly sleeved on the preheating pipe (3).

3. The device for recycling exhaust gas from an enamel-lined gas furnace according to claim 2, characterized in that, The inner wall of the cleaning ring (12) is fixedly equipped with a scraper, which is in contact with the outer wall of the preheating pipe (3), and the side wall of the scraper is chamfered.

4. The device for recycling exhaust gas from an enamel-lined gas furnace according to claim 1, characterized in that, The preheating pipe (3) is made of copper. The inner wall of the air inlet pipe (1) is fixedly installed with a heat insulation foam board, and the position of the heat insulation foam board corresponds to that of the preheating pipe (3).

5. The device for recycling exhaust gas from an enamel-lined gas furnace according to claim 1, characterized in that, Multiple support rods are fixedly installed at the bottom of the air intake pipe (1), and each support rod is fixedly connected to the air intake pipe (1) with a shock-absorbing structure.

6. The device for recycling tail gas from an enamel-lined gas furnace according to claim 1, characterized in that, The fan blade (7) is fixedly installed on the fixed ring (4).

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