A device for recycling waste heat from exhaust gas of a combustion furnace and a method for recovering waste heat from the waste gas of a combustion furnace

Abstract

The present invention provides a waste heat recycling device for exhaust gas from a combustion furnace and a waste heat recovery method thereof, which belongs to the technical field of waste heat recycling of exhaust gas; it comprises a protective shell and a plurality of water pipes and exhaust pipes arranged inside the protective shell, an air inlet pipe fixedly installed on the exhaust pipe, and an air outlet pipe installed through the protective shell, wherein a cavity is provided inside the protective shell, a plurality of the water pipes are evenly arranged in the cavity along the vertical direction, and an inspection port is provided on one side of the cavity, and a heat exchange mechanism is provided between adjacent water pipes. The present invention ensures that the water inside the water pipe is heated and used normally, and can efficiently utilize the heat in the exhaust gas for waste heat recycling without applying additional electric energy. In addition, in the device, the exhaust gas and the water pipe are heat-conducted through the pipe groove, and the exhaust gas is uniformly treated after flowing out of the exhaust pipe to avoid contact between the exhaust gas and water and affecting the quality of the hot water.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas waste heat recycling, and in particular to a combustion furnace waste gas waste heat recycling device and a waste heat recovery method. Background Art

[0002] The combustion furnace will produce waste gas during operation, and the temperature of the waste gas is very high. Reusing the waste heat of the combustion furnace waste gas is a common energy recovery and energy-saving measure. By installing a waste heat recovery device in the waste gas pipeline, the heat energy in the waste gas can be transferred to water or air to heat the water or air in the production process. This can not only improve energy utilization and reduce production costs, but also reduce pollution to the atmospheric environment. Waste heat recycling technology has been widely used in industrial production and is of great significance for achieving energy conservation, emission reduction and sustainable development.

[0003] Authorization announcement number CN109114994B discloses a Chinese patent for a combustion furnace waste gas waste heat recycling device and a waste heat recovery method, which relates to the technical field of waste gas waste heat utilization, including a device body, a filtering mechanism installed on the inner wall of the device body, and a base fixedly connected to the bottom surface of the device body.

[0004] In the above patent, the exhaust gas is filtered through multiple layers and then combined with atomized water vapor. The mixture is heated and evaporated. In the process of recycling the exhaust gas, the spraying mechanism needs to consume energy to atomize the water into fine droplets, and the distillation mechanism needs to consume electricity to generate high temperature to evaporate the droplets, which increases the overall energy consumption of the system. In addition, the filtered exhaust gas cannot be completely clean, which affects the quality of the water that is finally recycled. Therefore, the efficiency of the waste heat utilization is low, and more electricity is required to complete the waste heat utilization. Therefore, the present application provides a combustion furnace exhaust gas waste heat recycling device and a waste heat recovery method to meet the needs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a combustion furnace exhaust gas waste heat recycling device and a waste heat recovery method to solve the problem that more electric energy is needed to complete waste heat utilization, resulting in low waste heat utilization efficiency.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A device for recycling waste heat from exhaust gas from a combustion furnace comprises a protective shell, a plurality of water pipes and exhaust pipes arranged inside the protective shell, an air inlet pipe fixedly installed on the exhaust pipe, and an air outlet pipe installed through the protective shell, wherein a cavity is provided in the protective shell, a plurality of the water pipes are evenly arranged in the cavity along a vertical direction, and an inspection port is provided on one side of the cavity, a heat exchange mechanism is provided between adjacent water pipes, and the heat exchange mechanism comprises a heat exchange shell 1 and a heat exchange shell 2, the inner wall of the heat exchange shell 1 is slidably sleeved with the outer wall of the heat exchange shell 2, and the heat exchange shell 1 The connection part with the heat exchange shell 2 is sealed, an air distribution plate is fixedly installed inside the heat exchange shell 2, a circulation part for ventilation is provided on the side of the air distribution plate away from the exhaust pipe, two springs 1 are fixedly installed on the air distribution plate, the other end of the spring 1 is fixedly connected to the bottom of the heat exchange shell 1, and the heat exchange shell 1 and the heat exchange shell 2 are both provided with a pipe groove matching the outer wall of the water pipe, and the inner wall of the pipe groove is provided with a heat conductive sheet, which is deformed under pressure and fits the outer wall of the water pipe, and the two opposite pipe grooves form a heat exchange cavity matched with the water pipe;

[0008] A mounting seat is fixedly installed on the protective shell, and an adjusting mechanism is arranged inside the mounting seat to drive any group of matched heat exchange shells 1 and 2 to approach each other and separate from the water pipe. The adjusting mechanism is also used to drive the heat exchange shells 1 and 2 approaching each other to enter and exit the inspection port by rotating. One end of the air inlet pipe is movably installed with the heat exchange shell 2, and one end of the air outlet pipe is movably installed with the heat exchange shell 1. A filtering mechanism is penetrated on the exhaust pipe.

[0009] Preferably, the adjustment mechanism includes a rotating tube rotatably connected to the mounting seat, a plurality of limit columns are evenly arranged on the rotating tube along the axial direction of the rotating tube, a plurality of limit plates corresponding to the positions of the limit columns are arranged on the outer wall of the rotating tube, and the limit plate consists of two halves, the limit plate is slidably connected to the heat exchange shell, a threaded groove is provided on the inner wall of the limit plate, the end of the threaded groove away from the water pipe is higher than the other end, the limit column is movably arranged inside the threaded groove, a telescopic rod is movably arranged inside the rotating tube, two limit blocks are fixedly installed on the inner wall of the rotating tube, the limit block is a fan-shaped block body and two fan-shaped protrusions are symmetrically arranged on the top, a clamping block is fixedly installed on one end of the telescopic rod, a clamping groove adapted to the clamping block is arranged between the two fan-shaped protrusions, and when the rotating tube needs to be rotated, the clamping block is clamped in the clamping groove.

[0010] Preferably, a guide tube is fixedly installed on the inner wall of the heat exchange shell one, and a top tube is fixedly installed on the inner wall of the heat exchange shell two, the outer wall of the top tube is slidingly connected to the inner wall of the guide tube and remains sealed, the top of the top tube is rotatably connected to a ball, and the outer wall of the guide tube is movably sleeved with the air distribution plate.

[0011] Preferably, a support plate is fixedly installed on the water pipe, two support rods are fixedly installed on the water pipe, a mounting groove matching the support rod is opened inside the protective shell, a plate placement groove for placing the support plate is penetrated through the pipe placement groove, and arc grooves matching the support rods are opened on the heat exchange shell one and the heat exchange shell two.

[0012] Preferably, one end of the air inlet pipe and the air outlet pipe are both provided with a ventilation mechanism, and the ventilation mechanism includes a fixing ring fixedly mounted on the inner wall of the heat exchange shell one and the heat exchange shell two, the inner wall of the fixing ring is fixedly mounted with an elastic ring, the inner wall of the fixing ring is slidably connected with a ventilation head, and one side of the ventilation head is in contact with one side of the elastic ring, the ventilation head is a gradually shrinking frustum portion close to the air outlet pipe, and the frustum portion is penetrated by a plurality of ventilation holes, the inner wall of the air outlet pipe is slidably connected with a movable plate, two limiting ears are fixedly mounted on the movable plate, and a spring 2 is fixedly mounted on the limiting ear, the inner wall of the air outlet pipe is provided with a limiting groove for cooperating with the limiting ear to move, the other end of the spring 2 is fixedly mounted to the inner wall of the limiting groove, and one side of the ventilation head is in conflict with one side of the movable plate.

[0013] Preferably, the filtering mechanism includes a fixed sleeve fixedly mounted on the exhaust pipe, a fixed plate fixedly mounted on the outer wall of the exhaust pipe, one side of the fixed plate fixedly mounted on the top of the protective shell, a connecting rod rotatably connected to the fixed plate, a connecting disk fixedly mounted on the top of the connecting rod, four filter tubes movably passing through the inside of the connecting disk, filter cotton fixedly mounted on the inner wall of the filter tube, the top and bottom of the filter tube are in contact with one side of the exhaust pipe, and four conical filter elements are fixedly mounted on the filter cotton.

[0014] Preferably, a fixing seat is fixedly installed on the fixing sleeve, a pushing rod is rotatably connected inside the fixing seat, a torsion spring is fixedly installed on one side of the pushing rod, the other end of the torsion spring is fixedly connected to the inner wall of the fixing seat, one end of the pushing rod is slidably connected to a limiting rod, one end of the limiting rod is slidably connected to the inside of the fixing sleeve, and the outer wall of the filter tube is provided with a circular groove matching the limiting rod.

[0015] Preferably, anti-collision plates are fixedly mounted on the heat exchange shell 1 and the heat exchange shell 2, an anti-collision rod is fixedly mounted on the mounting seat, and one side of the anti-collision plate is in contact with one side of the anti-collision rod.

[0016] Preferably, a force-bearing rod is fixedly installed on the heat exchange shell 1 and the heat exchange shell 2, and an arc portion is provided on the limiting plate, and the curvature of the arc portion fits the curvature of one side of the anti-collision rod.

[0017] A method for recovering waste heat from furnace exhaust gas comprises the following steps:

[0018] S1, the heat exchange shell 1 and the heat exchange shell 2 are located inside the protective shell and are open, the air inlet pipe is connected to the heat exchange shell 2, the air outlet pipe is connected to the heat exchange shell 1, and the pipe groove is in contact with the outer wall of the water pipe;

[0019] S2, the exhaust gas flows through the filter mechanism from the exhaust pipe and enters the intake pipe;

[0020] S3. The exhaust gas enters the interior of the heat exchange shell 2, flows along the air distributor plate to the exhaust pipe on one side of the heat exchange shell 1 for discharge, and the exhaust gas heats the water inside the water pipe to complete the heat exchange.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] In the above scheme, by setting up a heat exchange mechanism and an adjustment mechanism, exhaust gas is introduced into the internal cavities of the heat exchange shell 1 and the heat exchange shell 2 to heat the water inside the pipe groove and the water pipe, and the upper and lower sides of the multiple water pipes in the middle part are both fitted with the pipe groove, wherein the heat conductive sheet is a heat conductive silicone sheet, which is deformed after being subjected to the pressure between the water pipe 2 and the pipe groove 65, and can then fit the outer wall of the water pipe and achieve a good heat conduction effect. When the single-group fitted heat exchange shell 1 and the heat exchange shell 2 are being repaired, the other side of the multiple water pipes in the middle is heated, so that the heating of the water pipe can still be guaranteed, thereby ensuring the normal heating and use of the water inside the water pipe. Without the need to apply additional electrical energy, the heat in the exhaust gas can be efficiently utilized to reuse the waste heat. In addition, in the device, the exhaust gas and the water pipe are heat-conducted through the pipe groove, and the exhaust gas is uniformly treated after flowing out of the exhaust pipe to avoid contact between the exhaust gas and the water and affecting the quality of the hot water.

[0023] By providing a ball that can lift up the water pipe, when replacing and repairing the heat exchange shell 1 and the heat exchange shell 2, the support rod fixes the water pipe while the ball lifts up one side of the water pipe, thereby preventing the water pipe from being deformed when it leaves the pipe groove, effectively extending the service life of the water pipe.

[0024] By setting up the ventilation mechanism, when the heat exchange shell 1 and the heat exchange shell 2 are unfolded inside the protective shell, they are automatically connected. When the heat exchange shell 1 and the heat exchange shell 2 are compressed, the ventilation head loses resistance to the movable plate, so that the movable plate part achieves a leak-proof effect, thereby preventing the exhaust gas inside the exhaust pipe from overflowing and polluting the air.

[0025] By setting up a filtering mechanism, the exhaust gas can be initially filtered so that solid impurity particles such as ash remain inside the filter tube, avoiding more solid impurities from entering the inside of the intake pipe and causing blockage of the ventilation mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0027] Figure 1 It is a three-dimensional structural schematic diagram of a combustion furnace exhaust gas waste heat recycling device;

[0028] Figure 2 This is a schematic diagram of the internal structure of a combustion furnace exhaust gas waste heat recycling device;

[0029] Figure 3 The three-dimensional structure diagram of the guide pipe and the top pipe;

[0030] Figure 4 It is a schematic diagram of the three-dimensional structure when the cavity composed of the heat exchange shell 1 and the heat exchange shell 2 is at its largest;

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure when the cavity composed of the heat exchange shell 1 and the heat exchange shell 2 is at its smallest;

[0032] Figure 6 It is a schematic diagram of the three-dimensional structure after the heat exchange shell 1 and the heat exchange shell 2 are rotated 180 degrees;

[0033] Figure 7 It is a three-dimensional structural schematic diagram of the regulating mechanism;

[0034] Figure 8 for Figure 7 The enlarged structural diagram at C in the middle;

[0035] Fig. 9 It is a structural schematic diagram of the thread groove;

[0036] Fig.10 for Figure 2 The enlarged structural diagram at A in the middle;

[0037] Fig.11 for Figure 2 The enlarged structural diagram at B in the middle;

[0038] Fig.12 The flowchart of the waste heat recovery method of the combustion furnace exhaust gas is shown in FIG.

[0039] [reference numerals]

[0040] 1. Protective shell; 2. Water pipe; 21. Support plate; 22. Support rod; 3. Exhaust pipe; 4. Inlet pipe; 5. Exhaust pipe; 6. Heat exchange mechanism; 61. Heat exchange shell 1; 62. Heat exchange shell 2; 63. Air distributor; 64. Spring 1; 65. Pipe slot; 66. Plate slot; 67. Arc slot; 68. Guide pipe; 69. Top pipe; 610. Ball; 7. Adjustment mechanism; 71. Rotating pipe; 72. Limiting column; 73. Limiting plate; 74. Threaded groove; 75. Telescopic rod; 76. Limiting block ;77, block;8, ventilation mechanism;81, fixing ring;82, elastic ring;83, ventilation head;84, movable plate;85, limiting ear;86, spring two;9, filtering mechanism;91, fixing sleeve;92, fixing plate;93, connecting rod;94, connecting plate;95, filter tube;96, filter cotton;97, truncated cone filter element;98, fixing seat;99, pushing rod;910, torsion spring;911, limiting rod;10, mounting seat;11, anti-collision plate;12, anti-collision rod;13, force rod.

[0041] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0042] The following is a detailed description of a combustion furnace waste gas waste heat recycling device and a waste heat recovery method provided by the present invention in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0043] It should be noted that the embodiments indicated by "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" etc. in the specification may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it should be within the knowledge of technicians in the relevant field whether or not such features, structures or characteristics are explicitly described in conjunction with other embodiments.

[0044] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0045] like Figure 1-9As shown, an embodiment of the present invention provides a waste heat recycling device for exhaust gas from a combustion furnace, comprising a protective shell 1 and a plurality of water pipes 2 and an exhaust pipe 3 arranged inside the protective shell 1, an air inlet pipe 4 fixedly installed on the exhaust pipe 3, and an air outlet pipe 5 installed through the protective shell 1, a cavity is opened in the protective shell 1, a plurality of water pipes 2 are evenly arranged in the cavity along the vertical direction, and an inspection port is opened on one side of the cavity, a heat exchange mechanism 6 is arranged between adjacent water pipes 2, the heat exchange mechanism 6 comprises a heat exchange shell 1 61 and a heat exchange shell 2 62, the inner wall of the heat exchange shell 1 61 is slidably sleeved with the outer wall of the heat exchange shell 2 62, and the heat exchange The connection part of the shell 1 61 and the heat exchange shell 2 62 is sealed, and an air distribution plate 63 is fixedly installed inside the heat exchange shell 2 62. A flow portion for ventilation is provided on the side of the air distribution plate 63 away from the exhaust pipe 3. Two springs 1 64 are fixedly installed on the air distribution plate 63. The other end of the spring 1 64 is fixedly connected to the bottom of the heat exchange shell 1 61. The heat exchange shell 1 61 and the heat exchange shell 2 62 are both provided with a pipe groove 65 matching the outer wall of the water pipe 2. The inner wall of the pipe groove 65 is provided with a heat conductive sheet. The heat conductive sheet is deformed under pressure and fits the outer wall of the water pipe 2. The two opposite pipe grooves 65 form a heat exchange cavity adapted to the water pipe 2.The protective shell 1 is fixedly mounted with a mounting seat 10, and the mounting seat 10 is provided with an adjusting mechanism 7 for driving any set of matched heat exchange shells 1 61 and 2 62 to approach each other and to separate from the water pipe 2. The adjusting mechanism 7 is also used to drive the heat exchange shells 1 61 and 2 62 to approach each other through the rotation in and out of the inspection port. One end of the air inlet pipe 4 is movably mounted with the heat exchange shell 2 62, and one end of the air outlet pipe 5 is movably mounted with the heat exchange shell 1 61. A filtering mechanism 9 is provided through the exhaust pipe 3. The adjusting mechanism 7 includes a rotating tube 71 rotatably connected to the mounting seat 10, and the rotating tube 71 is along the axis of the rotating tube 71. A plurality of limiting posts 72 are evenly arranged in the direction, and a plurality of limiting plates 73 corresponding to the positions of the limiting posts 72 are arranged on the outer wall of the rotating tube 71. The limiting plate 73 is composed of two halves, and the limiting plate 73 is slidably connected to the heat exchange shell 61. A threaded groove 74 is provided on the inner wall of the limiting plate 73, and the end of the threaded groove 74 away from the water pipe 2 is higher than the other end. The limiting posts 72 are movably arranged inside the threaded groove 74, and a telescopic rod 75 is movably arranged inside the rotating tube 71. Two limiting blocks 76 are fixedly installed on the inner wall of the rotating tube 71. The limiting blocks 76 are fan-shaped blocks and two fan-shaped protrusions are symmetrically arranged on the top. A block 77 is fixedly installed at one end of the retracted rod 75, and a slot adapted to the block 77 is provided between the two fan-shaped protrusions. When the rotating tube 71 needs to be rotated, the block 77 is engaged with the slot. A guide tube 68 is fixedly installed on the inner wall of the heat exchange shell 1 61, and a top tube 69 is fixedly installed on the inner wall of the heat exchange shell 2 62. The outer wall of the top tube 69 is slidably connected to the inner wall of the guide tube 68 and keeps a seal. A ball 610 is rotatably connected to the top of the top tube 69. The outer wall of the guide tube 68 is movably sleeved with the air distribution plate 63. A support plate 21 is fixedly installed on the water pipe 2, and two support rods 22 are fixedly installed on the water pipe 2. The shell 1 has a mounting groove for matching the support rod 22, the pipe groove 65 has a plate placement groove 66 for placing the support plate 21, the heat exchange shell 1 61 and the heat exchange shell 2 62 have arc grooves 67 for matching the support rod 22, the heat exchange shell 1 61 and the heat exchange shell 2 62 are fixedly mounted with an anti-collision plate 11, the mounting seat 10 is fixedly mounted with an anti-collision bar 12, one side of the anti-collision plate 11 is in contact with one side of the anti-collision bar 12, the heat exchange shell 1 61 and the heat exchange shell 2 62 are fixedly mounted with a force-bearing rod 13, and the limiting plate 73 is provided with an arc portion, and the arc of the arc portion fits the arc of one side of the anti-collision bar 12. ;

[0046] When utilizing the waste heat of exhaust gas, the heat exchange shell 1 61 and the heat exchange shell 2 62 are located inside the protective shell 1 and are in an open state. The pipe groove 65 on the top heat exchange shell 1 61 contacts the outer wall of the water pipe 2, and the pipe groove 65 at the bottom of the bottom heat exchange shell 2 62 contacts the outer wall of the water pipe 2. The remaining multiple water pipes 2 in the middle are located between the adjacent heat exchange shells 1 61 and 2 62, and the pipe grooves 65 opened in the two are adapted to the outer wall of the water pipe 2. The flow rate of the water flow inside the water pipe 2 located at the top and the bottom is half of the flow rate of the water flow inside the remaining water pipes 2 in the middle. The support plate 21 is arranged inside the plate groove 66 and fits. When installing the water pipe 2, the support rod 22 is arranged on the installation groove of the inner wall of the protective shell 1 for support. The support plate 21 supports and fixes the water pipe 2. After the air enters the air inlet pipe 4 from the inside of the exhaust pipe 3, it passes through the position of the ventilation mechanism 8 and enters the inside of the heat exchange shell 2 62. Then, the exhaust gas flows to the remaining part on one side of the air distributor plate 63, flows upward to the top of the air distributor plate 63, flows along the top of the air distributor plate 63 to the air outlet pipe 5, and the air outlet pipe 5 is connected to the exhaust gas purification device to purify the exhaust gas before discharging. When the exhaust gas enters the internal cavity of the heat exchange shell 2 62 and the heat exchange shell 1 61, the shells of the heat exchange shell 1 61 and the heat exchange shell 2 62 are heated, so that the pipe groove 65 heats the water pipe 2, and the water inside the water pipe 2 is heated. When the device is in use, four water pipes 2 can be heated at the same time, so that four groups of water can be used separately. When the heat exchange shell composed of the heat exchange shell 1 61 and the heat exchange shell 2 62 is damaged, first determine the set that needs to be repaired, and then manually extend the telescopic rod 75. The telescopic structure of the telescopic rod 75 is the same as the telescopic structure of the umbrella handle. After the telescopic rod 75 is extended to an appropriate length, it is rotated until the block 77 can move from the gap between the two limit blocks 76. When the block 77 moves to the top of the specified limit block 76, the block 77 is rotated 90° so that it is stuck in the groove between the fan-shaped protrusions on the top of the limit block 76. Then the telescopic rod 75 is rotated to drive the block 77 and the limit block 76 to rotate. The limit block 76 drives the rotating tube 71 and the limit column 72 to rotate. When the heat exchange shell 1 61 and the heat exchange shell 2 62 are located inside the protective shell 1 and are in an extended state, the limit column 72 is at At the lower end of the thread groove 74, since the height of the limiting column 72 remains unchanged, the limiting column 72 moves inside the thread groove 74, driving the limiting plate 73 to move in the vertical direction, and the heat exchange shell 1 61 and the heat exchange shell 2 62 gradually approach each other to compress their internal space, and the heat exchange shell 2 62 is blocked from the ventilation part of the air inlet pipe 4, and the heat exchange shell 1 61 is blocked from the ventilation part of the air outlet pipe 5. The top pipe 69 slides on the inner wall of the guide pipe 68, and the ball 610 contacts one side of the water pipe 2. After the heat exchange shell 1 61 and the heat exchange shell 2 62 are separated from the water pipe 2, the rotating tube 71 continues to rotate, so that the limiting column 72 contacts the highest end of the thread groove 74, and pushes the thread groove 74 and the limiting plate 73 to rotate until the heat exchange shell 1 61 and the heat exchange shell 2 62 rotate 180 degrees and are outside the protective shell 1.The heat exchange shell 1 61 and the heat exchange shell 2 62 are disassembled from the gas distribution plate 63 for maintenance. When the heat exchange shell 1 61 matched with the water pipe 2 at the uppermost end is repaired, or the heat exchange shell 2 62 matched with the water pipe 2 at the lowermost end is repaired, the water flow in the water pipe 2 is stopped. By setting the heat exchange mechanism 6 and the regulating mechanism 7, the exhaust gas is passed into the internal cavity of the heat exchange shell 1 61 and the heat exchange shell 2 62 to heat the water in the pipe groove 65 and the water pipe 2, and the upper and lower sides of the multiple water pipes 2 in the middle are all fitted with the pipe. The heat conducting sheet is a heat conducting silicone sheet, which is deformed by the pressure between the water pipe 2 and the pipe placing groove 65, and can fit the outer wall of the water pipe 2, and has a good heat conducting effect. When the single set of heat exchange shells 1 61 and 2 62 are repaired, the other side of the middle multiple water pipes 2 is heated, so that the heating of the water pipes 2 can still be guaranteed, so as to ensure the normal heating of the water inside the water pipes 2. The pipe placing groove 65 is arranged to fit the outer wall of the water pipe 2, and the outer wall of the water pipe 2 is heated while ensuring efficient heat exchange. When the heat exchange shell 1 61 and the heat exchange shell 2 62 are replaced and repaired, the support rod 22 fixes the water pipe 2 while the ball 610 lifts one side of the water pipe 2, thereby preventing the water pipe 2 from being deformed when it is separated from the pipe groove 65, effectively extending the service life of the water pipe 2. In addition, in the device, the exhaust gas and the water pipe 2 are heat-conducted through the pipe groove 65, and the exhaust gas is uniformly treated after flowing out of the exhaust pipe 5, so as to avoid the exhaust gas from contacting with water and affecting the quality of hot water. By setting the anti-collision plate 11, when the heat exchange shell 1 61 and the heat exchange shell 2 6 When the heat exchange shell 1 is rotated into the interior of the protective shell 1, one side of the anti-collision plate 11 contacts the anti-collision rod 12, so that the rotation angle of the heat exchange shell 1 61 and the heat exchange shell 2 62 is limited, and they cannot continue to rotate around the rotating tube 71 to collide with the inner wall of the protective shell 1. After the heat exchange shell 1 61 rotates 180°, the arc portion of the limiting plate 73 fits with the outer wall of the anti-collision rod 12 to limit, avoiding excessive rotation of the limiting plate 73 and the heat exchange shell 1 61. By setting the force-bearing rod 13, when the heat exchange shell 1 61 rotates, a force in the same direction as the rotation is applied to assist the rotation.

[0047] like Figure 2 and Fig.11As shown, one end of the air inlet pipe 4 and the air outlet pipe 5 are both provided with a ventilation mechanism 8, and the ventilation mechanism 8 includes a fixed ring 81 fixedly installed on the inner wall of the heat exchange shell 1 61 and the heat exchange shell 2 62, and an elastic ring 82 is fixedly installed on the inner wall of the fixed ring 81, and a ventilation head 83 is slidably connected to the inner wall of the fixed ring 81, and one side of the ventilation head 83 is in contact with one side of the elastic ring 82, and the ventilation head 83 is a gradually shrinking frustum near the air outlet pipe 5, and a plurality of ventilation holes are opened through the frustum, and a movable plate 84 is slidably connected to the inner wall of the air outlet pipe 5, and two limiting ears 85 are fixedly installed on the movable plate 84, and a spring 2 86 is fixedly installed on the limiting ear 85, and a limiting groove for cooperating with the limiting ear 85 to move is opened on the inner wall of the air outlet pipe 5, and the other end of the spring 2 86 is fixedly installed on the inner wall of the limiting groove, and one side of the ventilation head 83 is in contact with one side of the movable plate 84.

[0048] When the interior of the heat exchange shell 1 61 and the heat exchange shell 2 62 is ventilated, the heat exchange shell 1 61 and the heat exchange shell 2 62 are rotated into the protective shell 1 and then unfolded. During the unfolding process, the truncated cone portion of the vent head 83 contacts and squeezes one end of the outlet pipe 5, and the vent head 83 moves axially inside the fixed ring 81 and squeezes the elastic ring 82, and the elastic ring 82 is deformed. When the vent head 83 enters the outlet pipe 5, the outer wall of the vent head 83 and the inner wall of the opening part of the outlet pipe 5 fit each other, and the elastic ring 82 restores the deformation, driving the vent head 83 to contact the movable plate 84, so that the movable plate 84 and the limiting ear 85 move axially inside the outlet pipe 5, and the limiting ear 85 squeezes the spring 2 86, so that the outlet pipe 5 and the heat exchange shell 1 61 are installed and connected, and the air inlet pipe 4 and the heat exchange shell 2 62 are connected in the same step. At the same time, the exhaust gas inside the exhaust pipe 3 flows from the gap between the edge of the movable plate 84 and the inner wall of the air inlet pipe 4, enters the air hole of the ventilation head 83, enters the interior of the heat exchange shell 2 62, flows along the air distribution plate 63 to the exhaust pipe 5 on the side of the heat exchange shell 1 61 for discharge. By setting the ventilation mechanism 8, when the heat exchange shell 1 61 and the heat exchange shell 2 62 are unfolded inside the protective shell 1, they are automatically connected. When the heat exchange shell 1 61 and the heat exchange shell 2 62 are compressed, the ventilation head 83 loses the resistance to the movable plate 84, so that the spring 2 86 extends to push the limit ear 85 and the movable plate 84 to move, and the movable plate 84 resists the open ends of the air inlet pipe 4 and the air outlet pipe 5. When the exhaust gas is ventilated, the movable plate 84 is further squeezed, so that the movable plate 84 achieves a leak-proof effect, thereby preventing the exhaust gas inside the exhaust pipe 3 from overflowing and polluting the air.

[0049] like Figure 2 and Fig.10As shown, the filter mechanism 9 includes a fixed sleeve 91 fixedly mounted on the exhaust pipe 3, a fixed plate 92 is fixedly mounted on the outer wall of the exhaust pipe 3, one side of the fixed plate 92 is fixedly mounted on the top of the protective shell 1, a connecting rod 93 is rotatably connected to the fixed plate 92, a connecting plate 94 is fixedly mounted on the top of the connecting rod 93, four filter tubes 95 are movably penetrated inside the connecting plate 94, filter cotton 96 is fixedly mounted on the inner wall of the filter tube 95, and the top and bottom of the filter tube 95 are mutually connected to one side of the exhaust pipe 3. Four cone filter elements 97 are fixedly installed on the filter cotton 96, a fixed seat 98 is fixedly installed on the fixed sleeve 91, a push rod 99 is rotatably connected inside the fixed seat 98, a torsion spring 910 is fixedly installed on one side of the push rod 99, the other end of the torsion spring 910 is fixedly connected to the inner wall of the fixed seat 98, one end of the push rod 99 is slidably connected to a limit rod 911, one end of the limit rod 911 is slidably connected to the inside of the fixed sleeve 91, and a circular groove matching the limit rod 911 is opened on the outer wall of the filter tube 95.

[0050] During the process of recycling the waste heat of exhaust gas, the exhaust gas enters the filter tube 95 inside the fixed sleeve 91, and after being filtered by the filter cotton 96 and the conical filter element 97, it flows into the exhaust pipe 3 from the bottom of the filter tube 95, and then flows into the inside of the intake pipe 4. After the filter cotton 96 filters the ash in the exhaust gas, the ash accumulates on the top of the filter cotton 96, and the exhaust gas keeps flowing from the conical filter element 97. When the filter tube 95 needs to be replaced, the push rod 99 is manually pressed to deform the torsion spring 910. While the push rod 99 rotates inside the fixed seat 98, the other end drives the limit rod 911 to slide on the inner wall of the fixed sleeve 91, so that the limit rod 911 is disengaged from the circular groove on the outer wall of the filter tube 95, and then the connecting plate 94 is rotated. The connecting rod 93 rotates on the fixed plate 92, and the connecting disk 94 drives the filter tube 95 to rotate into the interior of the fixed sleeve 91 to continue filtering. During the rotation of the connecting disk 94, the plane contacts the bottom of the upper exhaust pipe 3 to temporarily block the exhaust gas. After the filter tube 95 is replaced, the force applied on one side of the push rod 99 is released, so that the torsion spring 910 recovers its deformation and drives the push rod 99 to move, so that the limit rod 911 is reinserted into the circular groove on one side of the filter tube 95. By setting the filtering mechanism 9, the exhaust gas can be initially filtered, so that solid impurity particles such as ash remain in the filter tube 95, avoiding more solid impurities from entering the interior of the intake pipe 4 and causing blockage in the ventilation mechanism 8.

[0051] like Fig.12 As shown, a method for recovering waste heat from furnace exhaust gas specifically comprises the following steps:

[0052] Step 1: The heat exchange shell 1 61 and the heat exchange shell 2 62 are located inside the protective shell 1 and are opened, the air inlet pipe 4 is connected to the heat exchange shell 2 62, the air outlet pipe 5 is connected to the heat exchange shell 1 61, and the pipe groove 65 is in contact with the outer wall of the water pipe 2;

[0053] Step 2: The exhaust gas flows through the filter mechanism 9 from the exhaust pipe 3 and then enters the intake pipe 4;

[0054] Step 3: The exhaust gas enters the interior of the heat exchange shell 2 62 , flows along the air distributor plate 63 to the exhaust pipe 5 on one side of the heat exchange shell 1 61 for discharge, and the exhaust gas heats the water inside the water pipe 2 to complete the heat exchange.

[0055] The technical solution provided by the present invention is that when utilizing the waste heat of the exhaust gas, the heat exchange shell 1 61 and the heat exchange shell 2 62 are located inside the protective shell 1 and are in an open state, the pipe groove 65 on the top heat exchange shell 1 61 is in contact with the outer wall of the water pipe 2, the pipe groove 65 at the bottom of the bottom heat exchange shell 2 62 is in contact with the outer wall of the water pipe 2, and the remaining multiple water pipes 2 in the middle are located between the adjacent heat exchange shell 1 61 and the heat exchange shell 2 62, and the pipe grooves 65 opened in the two are in contact with the water pipe 2. 2, the flow rate of the water flow inside the water pipe 2 at the uppermost and lowermost ends is half of the flow rate of the water flow inside the other water pipes 2 in the middle, the support plate 21 is arranged inside the plate groove 66 and fits, when installing the water pipe 2, the support rod 22 is arranged on the installation groove of the inner wall of the protective shell 1 for support, the support plate 21 supports and fixes the water pipe 2, the heat exchange shell 1 61 and the heat exchange shell 2 62 rotate into the protective shell 1 and then unfold, during the unfolding process, the ventilation head 8 The truncated cone portion of 3 contacts and squeezes one end of the outlet pipe 5, the vent head 83 moves axially inside the fixed ring 81 and squeezes the elastic ring 82, the elastic ring 82 is deformed, and when the vent head 83 enters the outlet pipe 5, the outer wall of the vent head 83 and the inner wall of the opening of the outlet pipe 5 fit each other, the elastic ring 82 recovers its deformation, and drives the vent head 83 to resist the movable plate 84, so that the movable plate 84 and the limiting ear 85 move axially inside the outlet pipe 5, and the limiting ear 85 squeezes spring 2 86 to realize the installation and connection between the outlet pipe 5 and the heat exchange shell 1 61. The steps of connecting the air inlet pipe 4 and the heat exchange shell 2 62 are the same. The exhaust gas inside the exhaust pipe 3 flows from the gap between the edge of the movable plate 84 and the inner wall of the air inlet pipe 4, enters the air hole of the vent head 83, enters the interior of the heat exchange shell 2 62, flows along the air distributor plate 63 to the outlet pipe 5 on one side of the heat exchange shell 1 61 for discharge, and the outlet pipe 5 is further connected to the exhaust gas purification device to purify the exhaust gas before discharge;

[0056] The exhaust gas enters the filter tube 95 inside the fixed sleeve 91, and after being filtered by the filter cotton 96 and the truncated cone filter element 97, it flows into the exhaust pipe 3 from the bottom of the filter tube 95, and then flows into the inside of the intake pipe 4. After the filter cotton 96 filters the ash in the exhaust gas, the ash accumulates on the top of the filter cotton 96, and the exhaust gas keeps flowing from the truncated cone filter element 97. When the filter tube 95 needs to be replaced, the push rod 99 is manually pressed to deform the torsion spring 910. While the push rod 99 rotates inside the fixed seat 98, the other end of the push rod drives the limit rod 911 to slide on the inner wall of the fixed sleeve 91, so that The limiting rod 911 is separated from the circular groove on the outer wall of the filter tube 95, and then the connecting plate 94 is rotated to make the connecting rod 93 rotate on the fixing plate 92, and the connecting plate 94 drives the filter tube 95 to rotate into the interior of the fixing sleeve 91 to continue filtering. During the rotation of the connecting plate 94, the plane contacts the bottom of the upper exhaust pipe 3 to temporarily block the exhaust gas. After the filter tube 95 is replaced, the force applied on one side of the push rod 99 is released, so that the torsion spring 910 recovers its deformation and drives the push rod 99 to move, so that the limiting rod 911 is reinserted into the circular groove on one side of the filter tube 95;

[0057] When the exhaust gas enters the internal cavity of the heat exchange shell 2 62 and the heat exchange shell 1 61, the shells of the heat exchange shell 1 61 and the heat exchange shell 2 62 are heated, so that the pipe groove 65 heats the water pipe 2, and the water inside the water pipe 2 is heated. When the device is in use, four water pipes 2 can be heated at the same time, so that four groups of water can be used separately. When a heat exchange shell composed of a group of heat exchange shells 1 61 and heat exchange shells 2 62 is damaged, first determine the group that needs to be repaired, and then manually extend the telescopic rod 75. The telescopic structure of the telescopic rod 75 is consistent with the extension of the umbrella handle. The telescopic structure is the same. After the telescopic rod 75 is stretched to a suitable length, it is rotated until the block 77 can move from the gap between the two limit blocks 76. When the block 77 moves to the top of the specified limit block 76, the block 77 is rotated 90° so that it is stuck in the slot between the fan-shaped protrusions on the top of the limit block 76. Then the telescopic rod 75 is rotated to drive the block 77 and the limit block 76 to rotate. The limit block 76 drives the rotating tube 71 and the limit column 72 to rotate. When the heat exchange shell 1 61 and the heat exchange shell 2 62 are located inside the protective shell 1 and are in the extended state , the limiting post 72 is at the lower end of the thread groove 74. Since the height of the limiting post 72 remains unchanged, the limiting post 72 moves inside the thread groove 74, driving the limiting plate 73 to move in the vertical direction. The heat exchange shell 1 61 and the heat exchange shell 2 62 gradually approach each other to compress their internal space. The heat exchange shell 2 62 is blocked from the ventilation part of the air inlet pipe 4, and the heat exchange shell 1 61 is blocked from the ventilation part of the air outlet pipe 5. The top pipe 69 slides on the inner wall of the guide pipe 68, and the ball 610 contacts one side of the water pipe 2. After the heat exchange shell 1 61 and the heat exchange shell 2 detach from the water pipe 2, Continue to rotate the rotating tube 71 so that the limiting column 72 contacts the highest end of the threaded groove 74, and pushes the threaded groove 74 and the limiting plate 73 to rotate until the heat exchange shell 1 61 and the heat exchange shell 2 62 are rotated 180° and are outside the protective shell 1. Then, the heat exchange shell 1 61 and the heat exchange shell 2 62 are removed from the air distribution plate 63 for maintenance. When the heat exchange shell 1 61 matched with the water pipe 2 at the uppermost end is repaired, or the heat exchange shell 2 62 matched with the water pipe 2 at the lowermost end is repaired, water stops flowing inside the water pipe 2.

[0058] The present invention encompasses any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0059] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A device for recycling waste heat from exhaust gas from a combustion furnace, comprising a protective shell (1), a plurality of water pipes (2) and exhaust pipes (3) arranged inside the protective shell (1), an air inlet pipe (4) fixedly installed on the exhaust pipe (3), and an air outlet pipe (5) installed through the protective shell (1), wherein a cavity is provided inside the protective shell (1), a plurality of the water pipes (2) are evenly arranged in the cavity in a vertical direction, and an inspection port is provided on one side of the cavity, characterized in that: A heat exchange mechanism (6) is provided between adjacent water pipes (2), the heat exchange mechanism (6) comprising a heat exchange shell 1 (61) and a heat exchange shell 2 (62), the inner wall of the heat exchange shell 1 (61) and the outer wall of the heat exchange shell 2 (62) being slidably sleeved, and the connection between the heat exchange shell 1 (61) and the heat exchange shell 2 (62) is sealed, an air distribution plate (63) is fixedly installed inside the heat exchange shell 2 (62), and a circulation portion for ventilation is provided on a side of the air distribution plate (63) away from the exhaust pipe (3), and the Two springs (64) are fixedly mounted on the air distribution plate (63), the other end of the spring (64) being fixedly connected to the bottom of the heat exchange shell (61), the heat exchange shell (61) and the heat exchange shell (62) being both provided with pipe grooves (65) matching the outer wall of the water pipe (2), the inner wall of the pipe grooves (65) being provided with heat conductive sheets, which are deformed under pressure and fit into the outer wall of the water pipe (2), and the two opposite pipe grooves (65) forming a heat exchange cavity matching the water pipe (2); The protective shell (1) is fixedly mounted with a mounting seat (10), and the mounting seat (10) is provided with an adjusting mechanism (7) inside thereof for driving any set of matched heat exchange shells 1 (61) and 2 (62) to approach each other and to separate from the water pipe (2). The adjusting mechanism (7) is also used for driving the heat exchange shells 1 (61) and 2 (62) approaching each other to enter and exit the inspection port by rotating. One end of the air inlet pipe (4) is movably mounted with the heat exchange shell 2 (62), and one end of the air outlet pipe (5) is movably mounted with the heat exchange shell 1 (61). A filtering mechanism (9) is provided through the exhaust pipe (3); The regulating mechanism (7) comprises a rotating tube (71) rotatably connected to the mounting seat (10); a plurality of limiting columns (72) are evenly arranged on the rotating tube (71) along the axial direction of the rotating tube (71); a plurality of limiting plates (73) corresponding to the positions of the limiting columns (72) are arranged on the outer wall of the rotating tube (71); the limiting plate (73) is composed of two halves; the limiting plate (73) is slidably connected to the heat exchange shell (61); a thread groove (74) is provided on the inner wall of the limiting plate (73); the thread groove (74) is away from one end of the water passage pipe (2). The stop column (72) is higher than the other end, and is movably arranged inside the thread groove (74). A telescopic rod (75) is movably arranged inside the rotating tube (71). Two stop blocks (76) are fixedly installed on the inner wall of the rotating tube (71). The stop block (76) is a fan-shaped block and has two fan-shaped protrusions symmetrically arranged on the top. A clamping block (77) is fixedly installed on one end of the telescopic rod (75). A clamping groove matched with the clamping block (77) is arranged between the two fan-shaped protrusions. When the rotating tube (71) needs to be rotated, the clamping block (77) is clamped with the clamping groove.

2. The combustion furnace exhaust gas waste heat recycling device according to claim 1 is characterized in that: A guide tube (68) is fixedly mounted on the inner wall of the heat exchange shell 1 (61), and a top tube (69) is fixedly mounted on the inner wall of the heat exchange shell 2 (62). The outer wall of the top tube (69) is slidably connected to the inner wall of the guide tube (68) and maintains a seal. A ball (610) is rotatably connected to the top of the top tube (69), and the outer wall of the guide tube (68) is movably sleeved with the air distribution plate (63).

3. The combustion furnace exhaust gas waste heat recycling device according to claim 1 is characterized in that: A support plate (21) is fixedly mounted on the water pipe (2), two support rods (22) are fixedly mounted on the water pipe (2), a mounting groove matching the support rods (22) is provided inside the protective shell (1), a plate placement groove (66) for placing the support plate (21) is provided through the pipe placement groove (65), and an arc groove (67) matching the support rods (22) is provided on both the heat exchange shell 1 (61) and the heat exchange shell 2 (62).

4. The combustion furnace exhaust gas waste heat recycling device according to claim 1 is characterized in that: One end of each of the air inlet pipe (4) and the air outlet pipe (5) is provided with a ventilation mechanism (8), the ventilation mechanism (8) comprising a fixing ring (81) fixedly mounted on the inner wall of the heat exchange shell 1 (61) and the heat exchange shell 2 (62), an elastic ring (82) fixedly mounted on the inner wall of the fixing ring (81), a ventilation head (83) slidably connected to the inner wall of the fixing ring (81), one side of the ventilation head (83) is in contact with one side of the elastic ring (82), and the side of the ventilation head (83) close to the air outlet pipe (5) is gradually contracted. A small truncated cone portion is provided, and a plurality of vent holes are formed through the truncated cone portion. The inner wall of the air outlet pipe (5) is slidably connected to a movable plate (84). Two limiting ears (85) are fixedly mounted on the movable plate (84). A second spring (86) is fixedly mounted on the limiting ears (85). A limiting groove is formed on the inner wall of the air outlet pipe (5) to cooperate with the limiting ears (85) to move. The other end of the second spring (86) is fixedly mounted on the inner wall of the limiting groove. One side of the vent head (83) contacts one side of the movable plate (84).

5. The combustion furnace exhaust gas waste heat recycling device according to claim 1, characterized in that: The filtering mechanism (9) comprises a fixing sleeve (91) fixedly mounted on the exhaust pipe (3); a fixing plate (92) is fixedly mounted on the outer wall of the exhaust pipe (3); one side of the fixing plate (92) is fixedly mounted on the top of the protective shell (1); a connecting rod (93) is rotatably connected to the fixing plate (92); a connecting plate (94) is fixedly mounted on the top of the connecting rod (93); four filter tubes (95) are movably penetrated inside the connecting plate (94); filter cotton (96) is fixedly mounted on the inner wall of the filter tube (95); the top and bottom of the filter tube (95) are in contact with one side of the exhaust pipe (3); and four truncated cone filter elements (97) are fixedly mounted on the filter cotton (96).

6. The combustion furnace exhaust gas waste heat recycling device according to claim 5, characterized in that: A fixing seat (98) is fixedly mounted on the fixing sleeve (91), a push rod (99) is rotatably connected inside the fixing seat (98), a torsion spring (910) is fixedly mounted on one side of the push rod (99), the other end of the torsion spring (910) is fixedly connected to the inner wall of the fixing seat (98), one end of the push rod (99) is slidably connected to a limit rod (911), one end of the limit rod (911) is slidably connected to the inside of the fixing sleeve (91), and a circular groove matching the limit rod (911) is provided on the outer wall of the filter tube (95).

7. The combustion furnace exhaust gas waste heat recycling device according to claim 1, characterized in that: An anti-collision plate (11) is fixedly mounted on the heat exchange shell 1 (61) and the heat exchange shell 2 (62), an anti-collision rod (12) is fixedly mounted on the mounting seat (10), and one side of the anti-collision plate (11) is in contact with one side of the anti-collision rod (12).

8. The combustion furnace exhaust gas waste heat recycling device according to claim 1, characterized in that: A force bearing rod (13) is fixedly mounted on the heat exchange shell 1 (61) and the heat exchange shell 2 (62), and an arc portion is provided on the limiting plate (73), and the arc portion is in contact with the arc of one side of the anti-collision rod (12).

9. A method for recovering waste heat from furnace exhaust gas, characterized in that: Using any one of claims 1 to 8 of the exhaust gas waste heat recycling device of the combustion furnace, specifically comprising the following steps: S1, the heat exchange shell 1 (61) and the heat exchange shell 2 (62) are located inside the protective shell (1) and are open, the air inlet pipe (4) is connected to the heat exchange shell 2 (62), the air outlet pipe (5) is connected to the heat exchange shell 1 (61), and the pipe groove (65) is in contact with the outer wall of the water pipe (2); S2, the exhaust gas flows from the exhaust pipe (3) through the filter mechanism (9) and then enters the intake pipe (4); S3, the exhaust gas enters the interior of the second heat exchange shell (62), flows along the air distribution plate (63) to the exhaust pipe (5) on the side of the first heat exchange shell (61) for discharge, and the exhaust gas heats the water inside the water pipe (2), completing the heat exchange.

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