Waste gas heat recovery device

Abstract

The invention discloses a waste gas heat recovery device, and relates to the technical field of waste heat recovery of setting machines, the waste gas heat recovery device comprises a machine body, a head gas inlet pipe is fixedly installed on the left side wall of an inner cavity of the machine body in a penetrating mode, and a filtering mechanism used for filtering waste gas impurities is fixedly installed at the left end of the head gas inlet pipe; a plurality of frame-shaped cooling pipes are distributed in an inner cavity of the machine body at equal intervals, and pipe end parts are arranged at the upper end and the lower end of each frame-shaped cooling pipe. Firstly, waste gas generated by the setting machine is filtered, chemical fibers, batting, particles and other impurities contained in the waste gas are intercepted and filtered, and the impurities are prevented from blocking subsequent gas pipelines; according to the waste gas heat recovery device, the waste gas can be recycled, impurities can be removed and cleaned only by shifting the two protruding parts, meanwhile, switching between water cooling and air cooling can be achieved, heat energy of waste gas can be recycled to heat water resources, and therefore heated water can be used subsequently, and meanwhile switching to heat exchange through air cooling can be achieved to generate hot air to be used.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery of a setting machine, and in particular to a waste gas heat recovery device. Background Art

[0002] In the industrial production process, especially in the drying and shaping processes of textile printing and dyeing, food processing, chemical industry and other industries, the technology of heat recovery and reuse of high-temperature exhaust gas is used. These exhaust gases usually contain a large amount of heat energy. Direct emission not only wastes energy, but also increases the burden on the environment. In particular, the exhaust gas generated by the shaping machine in the textile industry will carry a large amount of impurities, which will put a heavier burden on the environment.

[0003] my country is the world's largest producer and exporter of textiles and clothing. The sustainable development of the textile industry is crucial to my country's economic development and solving social employment problems. The textile industry is also a high-pollution and high-energy-consuming industry, among which the energy consumption pollution of the setting machine is particularly serious. Generally, the internal heating temperature of the setting machine is between 160 and 220 degrees Celsius, and the exhaust gas emission temperature is between 150 and 210 degrees Celsius. The exhaust gas emission is about 2,500 to 6,000 cubic meters per hour. A single setting machine consumes 400,000 to 1.2 million kcal of energy. It is estimated that the heat energy consumed by fabric processing and setting only accounts for 25-30%, and the heat loss of the machine body accounts for about 8-10%. This part of the loss includes two factors. One is the heat radiation of the machine body, including the heat radiation of the gas pipeline. The second is that the setting machine is not a closed structure. When the internal air pressure is unbalanced, the hot exhaust gas overflows from the gap and wastes heat. In addition, a large amount of heat energy (more than 60%) is lost to the atmosphere with the exhaust gas, which consumes a lot of heat energy.

[0004] For traditional waste gas recovery devices, the functions are relatively simple. Considering the cost, water or air is often selected for heat exchange. Moreover, only water or air can be selected for heat exchange, which is not very convenient for some large factories to use. Summary of the invention

[0005] The purpose of the present invention is to provide an exhaust gas heat recovery device to solve the problems raised in the above-mentioned background technology. The project of the present invention is funded by Zhejiang Province's "Pioneer Leader + X" R&D project (2024C03117).

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an exhaust gas heat recovery device, comprising a body, a head air intake pipe is fixedly installed on the left side wall of the inner cavity of the body, a filtering mechanism for filtering exhaust gas impurities is fixedly installed on the left end of the head air intake pipe, a plurality of frame-type cooling pipes are evenly distributed in the inner cavity of the body, and each of the frame-type cooling pipes is respectively provided with pipe ends at the upper and lower ends, and except for the pipe end at the top of the first frame-type cooling pipe and the pipe end at the bottom of the last frame-type cooling pipe, connecting pipes are respectively connected between two adjacent pipe ends, and the interfaces at both ends of each connecting pipe are respectively rotatably connected to the corresponding pipe ends, the pipe end at the top of the first frame-type cooling pipe is rotatably connected to the head air intake pipe, and the pipe end at the bottom of the last frame-type cooling pipe is rotatably connected to an exhaust pipe, and the exhaust pipe extends through to the outside of the body.

[0007] Preferably, the filtering mechanism includes a main cylinder portion fixedly mounted on the left end face of the body, the air inlet at the left end of the head air inlet pipe extends through and into the inner cavity of the main cylinder portion, a discharge port is provided at the bottom of the inner cavity of the main cylinder portion, an elastic filter screen is fixedly mounted in the inner cavity of the main cylinder portion, an arc plate is slidably connected to the bottom end face of the main cylinder portion, a connecting rod is fixedly connected to the arc plate, the right end of the connecting rod is fixedly connected to the central thickened area of ​​the elastic filter screen, two protrusions are fixedly connected to the arc plate, and the two protrusions are symmetrically distributed about the center of the arc plate.

[0008] Preferably, the elastic filter is concavely arranged with the concave facing the direction of the head air intake pipe.

[0009] Preferably, ventilation grooves are equidistantly arranged on the front and rear end surfaces of the body, the bottom of the body is fixedly connected to a base, the upper end surface of the base is slidably connected to two side panels, each of the side panels is respectively tightly attached to the front and rear end surfaces of the body, and each of the side panels is equidistantly arranged with strip holes, and the distance between two adjacent strip holes is greater than the width distance of the ventilation grooves.

[0010] Preferably, an L-shaped plate is fixedly connected to the upper end face of one of the side plates, a rack is fixedly connected to the bottom end of the L-shaped plate, and a gear is fixedly sleeved on the tube end at the top end of each frame-type cooling tube, and each gear is meshed with the rack.

[0011] Preferably, an upper end surface of each of the side panels is provided with an extension portion, and each of the extension portions is slidably abutted against the upper end surface of the body.

[0012] Preferably, a cover plate is fixedly mounted on the upper end of the machine body, a slide groove is provided on the cover plate, and the L-shaped plate is slidably mounted in the slide groove.

[0013] Preferably, a water inlet pipe and a water outlet pipe are respectively provided on the right end surface of the machine body, wherein the water inlet pipe is located at the upper end and the water outlet pipe is located at the bottom end.

[0014] Preferably, a recovery frame is fixedly mounted on the left end surface of the machine body, and an opening at the top of the recovery frame faces the discharge port.

[0015] In summary, the beneficial effects of the present invention are:

[0016] The present invention first filters the exhaust gas generated by the stenter, intercepts and filters impurities such as chemical fibers, lint and particles contained in the exhaust gas, so as to prevent the impurities from clogging subsequent gas pipelines, and the impurities can be removed and cleaned only by moving two protrusions. At the same time, it can switch between water cooling and air cooling, and the heat energy of the exhaust gas can be recovered to heat water resources, so that the heated water can be used later. At the same time, it can also switch to using air cooling for heat exchange to generate hot air for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of an exhaust gas heat recovery device of the present invention;

[0019] Figure 2 This is a schematic structural diagram of an exhaust gas heat recovery device of the present invention from another perspective;

[0020] Figure 3 This is a schematic diagram of the front and cross-sectional structure of an exhaust gas heat recovery device of the present invention;

[0021] Figure 4 For the present invention Figure 3 A schematic diagram of the partially enlarged structure at center A;

[0022] Figure 5 This is a schematic diagram of the internal structure of an exhaust gas heat recovery device according to the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of a frame-type cooling pipe and a connecting pipe of an exhaust gas heat recovery device of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of an exhaust gas heat recovery device according to the present invention;

[0025] Figure 8This is a schematic diagram of the side panel structure of an exhaust gas heat recovery device of the present invention.

[0026] The symbols in the accompanying drawings are described as follows: body 10; base 11; recovery frame 12; side plate 13; strip hole 14; L-shaped plate 15; slide groove 16; cover plate 17; rack 18; ventilation groove 19; water inlet pipe 20; water outlet pipe 21; exhaust pipe 22; head air inlet pipe 23; gear 24; connecting pipe 25; frame-type cooling pipe 26; pipe end 27; filtering mechanism 30; main cylinder part 31; arc plate 32; raised part 33; elastic filter screen 35; connecting rod 36; discharge port 37; air inlet end pipe 38. DETAILED DESCRIPTION

[0027] The present invention will now be further described in detail in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic way, and therefore they only show the structures related to the present invention.

[0028] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0029] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0030] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0031] In the present invention, unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of at least two elements or the interaction relationship between at least two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Combine the following Figure 1-8 The present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front, and back directions mentioned below are the same as Figure 3 The view direction is consistent in front, back, left, right, up and down directions. Figure 3 is a front view of the device of the present invention, Figure 3 The directions shown are consistent with the front, back, left, right, up and down directions of the device of the present invention when viewed from the front.

[0033] See also Figure 1-8 The project of the present invention is funded by the Zhejiang Province "Jianbing Lingyan + X" R&D and research project (2024C03117). The present invention provides an embodiment: an exhaust gas heat recovery device, including a body 10, a head air intake pipe 23 is fixedly installed on the left side wall of the inner cavity of the body 10, and a filter mechanism 30 for filtering exhaust gas impurities is fixedly installed on the left end of the head air intake pipe 23. The generated high-temperature exhaust gas first passes through the filter mechanism 30 to filter and remove impurities, and then enters the head air intake pipe 23. A plurality of frame-type cooling pipes 26 are evenly distributed in the inner cavity of the body 10. Five frame-type cooling pipes 26 are selected here. The upper and lower ends of each frame-type cooling pipe 26 are respectively provided with pipe end portions 27, except that the pipe end portion 27 at the top of the first frame-type cooling pipe 26 and the pipe end portion 27 at the top of the last frame-type cooling pipe 26 are connected to each other. In addition to the tube end 27 at the bottom of the frame-type cooling tube 26, connecting tubes 25 are respectively connected between two adjacent tube ends 27, and the interfaces at both ends of each connecting tube 25 are respectively rotatably connected to the corresponding tube end 27, so that the five frame-type cooling tubes 26 are connected end to end through the connecting tubes 25, and each frame-type cooling tube 26 can rotate, the connecting tube 25 at the bottom is fixed to the bottom of the inner cavity of the body 10, and the connecting tube 25 at the top is fixed on the cover plate 17, the tube end 27 at the top of the first frame-type cooling tube 26 is rotatably connected to the head air intake pipe 23, and the tube end 27 at the bottom of the last frame-type cooling tube 26 is rotatably connected to the exhaust pipe 22, and the exhaust pipe 22 extends through to the outside of the body 10.

[0034] In addition, in one embodiment, the filtering mechanism 30 includes a main cylinder portion 31 fixedly installed on the left end surface of the body 10, the air inlet at the left end of the head air inlet pipe 23 extends through to the inner cavity of the main cylinder portion 31, and a discharge port 37 is provided at the bottom of the inner cavity of the main cylinder portion 31. An elastic filter screen 35 is fixedly installed in the inner cavity of the main cylinder portion 31, and an arc plate 32 is slidably connected to the bottom end surface of the main cylinder portion 31. A connecting rod 36 is fixedly connected to the arc plate 32, and the right end of the connecting rod 36 is fixedly connected to the central thickened area of ​​the elastic filter screen 35. Two protrusions 33 are fixedly connected to the arc plate 32, and the two protrusions 33 are symmetrically distributed about the center of the arc plate 32.

[0035] It should be noted that, in order to make it easier for filtered impurities to fall off, in the present embodiment, the elastic filter 35 is concavely arranged, with the concave facing the direction of the head air intake pipe 23 .

[0036] When the exhaust gas enters the inner cavity of the main cylinder 31 from the air inlet end pipe 38 at the left end of the main cylinder 31, the exhaust gas passes through the elastic filter 35, and the impurities such as chemical fibers, lint and particles contained in the exhaust gas are intercepted and filtered by the elastic filter 35 to prevent the impurities from clogging the subsequent gas pipeline. At the same time, the raised portion 33 is pushed back by hand, thereby driving the arc plate 32 to slide to the left, so that the discharge port 37 is opened, and at the same time, the elastic filter 35 is pulled to the left by the connecting rod 36. Movement, since the edge of the elastic filter 35 is fixed in the inner cavity of the main cylinder 31, only the middle area of ​​the elastic filter 35 will move to the left, so that the concave direction is toward the air inlet end tube 38, so that all the impurities intercepted on the elastic filter 35 fall off and fall through the discharge port 37, thereby greatly facilitating the cleaning of the impurities intercepted on the elastic filter 35. Since the elastic filter 35 itself has a certain elasticity, the arc plate 32 will automatically reset.

[0037] In addition, in one embodiment, ventilation slots 19 are evenly distributed on the front and rear end surfaces of the body 10, a base 11 is fixedly connected to the bottom of the body 10, and two side panels 13 are slidably connected to the upper end surface of the base 11, each of the side panels 13 is respectively close to the front and rear end surfaces of the body 10, and strip holes 14 are evenly distributed on each of the side panels 13, and the distance between two adjacent strip holes 14 is greater than the width distance of the ventilation slots 19, and an L-shaped plate 15 is fixedly connected to the upper end surface of one of the side panels 13, and a cover plate 17 is fixedly installed on the upper end of the body 10, and a slide groove 16 is provided on the cover plate 17, and the L-shaped plate 15 is slidably installed in the slide groove 16, and a rack 18 is fixedly connected to the bottom end of the L-shaped plate 15, and a gear 24 is fixedly sleeved on the tube end 27 at the top end of each of the frame-type cooling tubes 26, and each of the gears 24 is meshed with the rack 18;

[0038] When the exhaust gas is recycled to heat water resources, the distance between the two adjacent strip holes 14 is made to completely close the corresponding ventilation slot 19, so that the inner cavity of the body 10 forms a closed environment. At this time, water resources are introduced through the water inlet pipe 20 on the right end surface of the body 10, and the heated water is discharged from the water outlet pipe 21 at the bottom. After the water is introduced into the inner cavity of the body 10, the water completely immerses the frame-type cooling pipe 26. At this time, the exhaust gas is introduced into the head air intake pipe 23 by the filtering mechanism 30, so that the exhaust gas circulates through the frame-type cooling pipe 26, and uses the external water resources for water cooling, and heats the water for use at the same time, and finally the exhaust gas is discharged from the exhaust pipe 22;

[0039] When the exhaust gas needs to be recycled to heat the surrounding air, the water in the inner cavity of the body 10 is drained, and then the two side panels 13 are slid so that the ventilation slots 19 coincide with the strip holes 14, so that the inner cavity of the body 10 is hollowed out, and the outside air can pass through the ventilation slots 19 into the inner cavity of the body 10 and then pass out. When the side panels 13 are slid, the L-shaped plate 15 is driven to slide, thereby driving the rack 18 to slide, thereby driving the gear 24 to rotate, so that each of the frame-type cooling pipes 26 is rotated into an inclined state. Since the outside air passes through the ventilation slots 19 into the inner cavity of the body 10 and then passes out from the other side, the frame-type cooling pipe 26 is rotated into an inclined state, which can greatly increase the contact area between the frame-type cooling pipe 26 and the passing air, thereby greatly improving the utilization rate of thermal energy.

[0040] It should be noted that, in order to further ensure the stability of the side panels 13 when sliding, an extension portion is provided on the upper end surface of each side panel 13 , and each extension portion is slidably abutted against the upper end surface of the body 10 .

[0041] In addition, in one embodiment, a recovery frame 12 is fixedly mounted on the left end surface of the machine body 10, and the top opening of the recovery frame 12 faces the discharge port 37, so as to facilitate the recovery of filtered impurities.

[0042] When the exhaust gas is recycled to heat water resources, the distance between the two adjacent strip holes 14 is made to completely close the corresponding ventilation slot 19, so that the inner cavity of the body 10 forms a closed environment. At this time, water resources are introduced through the water inlet pipe 20 on the right end face of the body 10, and the heated water is discharged from the water outlet pipe 21 at the bottom. After the water is introduced into the inner cavity of the body 10, the water completely immerses the frame-type cooling pipe 26. The exhaust gas passes into the air inlet end pipe 38. When it enters the inner cavity of the main cylinder 31, the exhaust gas passes through the elastic filter 35. The elastic filter 35 is used to intercept and filter impurities such as chemical fibers, fluff and particles contained in the exhaust gas to prevent impurities from clogging the subsequent gas pipelines. At the same time, the raised portion 33 is pushed back by hand to drive the arc plate 32 to move to the left. The elastic filter 35 is moved to the left by sliding the elastic filter 35 so that the discharge port 37 is opened, and the connecting rod 36 is used to pull the elastic filter 35 to move to the left. Since the edge of the elastic filter 35 is fixed in the inner cavity of the main cylinder 31, only the middle area of ​​the elastic filter 35 moves to the left, so that the concave direction is toward the air inlet end pipe 38, so that all the impurities intercepted on the elastic filter 35 fall off and fall through the discharge port 37, which greatly facilitates the cleaning of the impurities intercepted on the elastic filter 35. Since the elastic filter 35 itself has a certain elasticity, the arc plate 32 will automatically reset, so that the exhaust gas circulates through the frame-type cooling pipe 26, uses external water resources for water cooling, and heats the water for use, and finally the exhaust gas is discharged from the exhaust pipe 22;

[0043] When the exhaust gas needs to be recycled to heat the surrounding air, the water in the inner cavity of the body 10 is drained, and then the two side panels 13 are slid so that the ventilation slots 19 coincide with the strip holes 14, so that the inner cavity of the body 10 is hollowed out, and the outside air can pass through the ventilation slots 19 into the inner cavity of the body 10 and then pass out. When the side panels 13 are slid, the L-shaped plate 15 is driven to slide, thereby driving the rack 18 to slide, thereby driving the gear 24 to rotate, so that each of the frame-type cooling pipes 26 is rotated into an inclined state. Since the outside air passes through the ventilation slots 19 into the inner cavity of the body 10 and then passes out from the other side, the frame-type cooling pipe 26 is rotated into an inclined state, which can greatly increase the contact area between the frame-type cooling pipe 26 and the passing air, thereby greatly improving the utilization rate of thermal energy.

[0044] The above is only a specific implementation of the invention, but the protection scope of the invention is not limited to it. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the invention. Therefore, the protection scope of the invention should be based on the protection scope defined in the claims.

Claims

1. An exhaust gas heat recovery device, comprising a body (10), characterized in that: A head air intake pipe (23) is fixedly installed through the left wall of the inner cavity of the machine body (10), and a filtering mechanism (30) for filtering exhaust gas impurities is fixedly installed at the left end of the head air intake pipe (23). A plurality of frame-type cooling pipes (26) are evenly distributed in the inner cavity of the machine body (10), and each frame-type cooling pipe (26) is provided with a pipe end (27) at the upper and lower ends, respectively. Except for the pipe end (27) at the top of the first frame-type cooling pipe (26) and the pipe end (27) at the bottom of the last frame-type cooling pipe (26), the other frame-type cooling pipes (26) are provided with a plurality of frame-type cooling pipes (26). ), two adjacent tube ends (27) are respectively connected with a connecting tube (25), and the interfaces at both ends of each connecting tube (25) are respectively rotatably connected with the corresponding tube ends (27), the tube end (27) at the top of the first frame-type cooling tube (26) is rotatably connected with the head air intake pipe (23), and the tube end (27) at the bottom of the last frame-type cooling tube (26) is rotatably connected with an exhaust pipe (22), and the exhaust pipe (22) extends through to the outside of the machine body (10).

2. The exhaust gas heat recovery device according to claim 1, characterized in that: The filtering mechanism (30) comprises a main cylinder (31) fixedly mounted on the left end surface of the machine body (10); the air inlet at the left end of the head air inlet pipe (23) extends through the inner cavity of the main cylinder (31); a discharge port (37) is provided at the bottom of the inner cavity of the main cylinder (31); an elastic filter screen (35) is fixedly mounted in the inner cavity of the main cylinder (31); an arc plate (32) is slidably connected to the bottom end surface of the main cylinder (31); a connecting rod (36) is fixedly connected to the arc plate (32); the right end of the connecting rod (36) is fixedly connected to the central thickened area of ​​the elastic filter screen (35); two protrusions (33) are fixedly connected to the arc plate (32); the two protrusions (33) are symmetrically distributed about the center of the arc plate (32).

3. The exhaust gas heat recovery device according to claim 2, characterized in that: The elastic filter (35) is arranged in a concave manner, with the concave direction facing the head air intake pipe (23).

4. The exhaust gas heat recovery device according to claim 3, characterized in that: The front and rear end surfaces of the machine body (10) are equidistantly provided with ventilation slots (19); the bottom of the machine body (10) is fixedly connected with a base (11); the upper end surface of the base (11) is slidably connected with two side panels (13); each of the side panels (13) is respectively closely attached to the front and rear end surfaces of the machine body (10); each of the side panels (13) is equidistantly provided with strip holes (14); and the distance between two adjacent strip holes (14) is greater than the width of the ventilation slots (19).

5. The exhaust gas heat recovery device according to claim 4, characterized in that: An L-shaped plate (15) is fixedly connected to the upper end surface of one of the side plates (13), a rack (18) is fixedly connected to the bottom end of the L-shaped plate (15), and a gear (24) is fixedly sleeved on the tube end (27) at the top end of each frame-shaped cooling tube (26), and each gear (24) is meshed with the rack (18).

6. The exhaust gas heat recovery device according to claim 5, characterized in that: The upper end surface of each side plate (13) is respectively provided with an extension portion, and each extension portion is respectively slidably abutted against the upper end surface of the machine body (10).

7. The exhaust gas heat recovery device according to claim 6, characterized in that: A cover plate (17) is fixedly mounted on the upper end of the machine body (10), a slide groove (16) is provided on the cover plate (17), and the L-shaped plate (15) is slidably mounted in the slide groove (16).

8. The exhaust gas heat recovery device according to claim 7, characterized in that: A water inlet pipe (20) and a water outlet pipe (21) are respectively provided through the right end surface of the machine body (10), wherein the water inlet pipe (20) is located at the upper end and the water outlet pipe (21) is located at the bottom end.

9. The exhaust gas heat recovery device according to claim 8, characterized in that: A recovery frame (12) is fixedly mounted on the left end surface of the machine body (10), and an opening at the top of the recovery frame (12) faces the discharge port (37).

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