Waste gas treatment and heat recovery device of setting machine

Abstract

The invention discloses a waste gas treatment and heat recovery device for a setting machine. The waste gas treatment and heat recovery device comprises a heat exchanger, a waste gas outlet fan, a waste gas filter and a fresh air outlet fan, one side of the heat exchanger is correspondingly connected with a waste gas filter and a fresh air outlet fan through connecting pieces; the other side of the heat exchanger is connected with a waste gas outlet fan through a connecting piece; 2-4 plate type heat exchange units which are sequentially connected in the opposite edge direction are arranged in the heat exchanger, and the heat exchanger is used for enabling fresh air and waste gas to be discharged after heat exchange in a V-shaped, Z-shaped or wave-shaped trend in respective flow channels; the waste gas filter is provided with a shell I, a filter cartridge I, a cleaning mechanism and a cleaning mechanism, the cleaning mechanism is provided with an inner cleaning brush assembly with a brush strip, and brush wires of the brush strip are elastically pressed on the inner wall of the filter cartridge I through an elastic piece; the cleaning mechanism is provided with a spraying pipe, and the spraying pipe is arranged in the first filter cylinder and located below the brush strip.

Description

Technical Field

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

[0002] The setting machine is an important equipment for drying, finishing and setting fabrics. Generally, the air in the setting machine is heated by heat-conducting oil, the fabric is heated and kept at a certain temperature for a certain period of time, so that the fabric structure changes and the setting purpose is achieved. However, the setting machine also discharges a large amount of hot and humid waste gas while setting and other work. Since the discharged waste gas contains a large amount of hair or fabric debris, oil and gas, etc., and the temperature can reach 150-220°C, direct discharge will not only cause a huge waste of heat energy, but also cause serious pollution to the environment. Therefore, it is particularly necessary to filter and heat-recover the waste gas. Although there is no shortage of such equipment in the prior art, the waste gas filtration efficiency and heat recovery efficiency of such devices or equipment in the prior art are low, and the equipment needs to be shut down and cleaned after a certain period of use. In addition, the existing heat recovery equipment hardly filters the fresh air, but only installs a filter at the fresh air inlet or outlet of the heat exchanger. This method will also reduce the heat exchange efficiency if the filter is blocked, and it is inconvenient to disassemble and replace the filter. Summary of the invention

[0003] Based on the above technical defects, the present invention provides a sizing machine exhaust gas treatment and heat recovery device, which is used to solve the problems of poor exhaust gas filtration effect and low heat exchange efficiency of existing exhaust gas heat recovery devices, and inability to achieve online cleaning.

[0004] In order to achieve the above technical effects, the technical solution adopted by the present invention is: A device for treating and recovering exhaust gas from a sizing machine, comprising a heat exchanger, an exhaust gas outlet fan, an exhaust gas filter and a fresh air outlet fan; an exhaust gas inlet and a fresh air outlet are arranged on one side of the heat exchanger, and the exhaust gas inlet and the fresh air outlet are respectively connected to the exhaust gas outlet of the exhaust gas filter and the fresh air exhaust port of the fresh air outlet fan through connecting pieces; a fresh air inlet and an exhaust gas outlet are arranged on the other side of the heat exchanger, and the exhaust gas outlet is also connected to the exhaust gas exhaust port of the exhaust gas outlet fan through connecting pieces; 2-4 plate heat exchange units connected in sequence along opposite edges are arranged in the heat exchanger, and the heat exchanger is used to make the fresh air and the exhaust gas in their respective flow channels to be discharged after heat exchange in a V-shaped, Z-shaped or wavy trend; the exhaust gas filter is provided with a shell, a filter cartridge, a cleaning mechanism and a cleaning machine Structure, the exhaust gas outlet is a through hole arranged on one side wall of the shell, one end of the filter cartridge is a closed end, and the other end is an open end, and the two ends are rotatably connected to the shell, and the open end of the filter cartridge is sealed and connected to the exhaust gas outlet; the cleaning mechanism comprises an internal cleaning brush assembly and an external cleaning brush respectively arranged inside and outside the filter cartridge, and the internal cleaning brush assembly is provided with a brush strip, an elastic member and a fixing rod; the brush strip is located on the side away from the exhaust gas inlet, and is located obliquely above the axis of the filter cartridge, the brush strip is connected to one end of the elastic member, and its brush wire is elastically pressed onto the inner wall of the filter cartridge through the elastic member, and the other end of the elastic member is fixed to the fixing rod; the cleaning mechanism is provided with a spray pipe, the spray pipe is arranged inside the filter cartridge and below the brush strip, and one end of the spray pipe extends out of the exhaust gas filter.

[0005] Furthermore, it also includes a fresh air filter, and the fresh air outlet of the fresh air filter is also connected to the fresh air inlet of the heat exchanger through a connecting piece.

[0006] Furthermore, the fresh air filter is provided with a second filter cartridge, a cleaning pipe is provided inside the second filter cartridge, a strip hole is opened on the shell of the fresh air filter near the cleaning pipe, a dust bag is installed at the strip hole, and a protective cover is provided outside the dust bag.

[0007] Furthermore, a plurality of flushing pipes are provided inside the heat exchanger, and the flushing pipes are arranged close to the upper and lower inner walls of the heat exchanger and are arranged at the head, the end, and the direction turning point of the exhaust gas flow channel with a V-shaped, Z-shaped or wavy trend.

[0008] Furthermore, one end of all the flushing pipes extends out of a side wall of the heat exchanger and are connected through a liquid inlet main pipe.

[0009] Furthermore, a fixing frame is installed at the exhaust gas outlet of the exhaust gas filter, one end of the fixing rod is fixed to the middle of the fixing frame, and the other end is rotatably installed at the center of the closed end of the filter cartridge through a bearing.

[0010] Furthermore, a support rod is fixedly mounted on the fixing rod, and the other end of the support rod is fixedly connected to the end of the spray pipe close to a closed end of the filter cartridge.

[0011] Furthermore, the connecting piece is a Tianfangdiyuan adapter, and the Tianfangdiyuan interface connected to the exhaust gas outlet of the exhaust gas filter is provided with an observation window.

[0012] Furthermore, the outer cleaning brush is pressed onto an outer wall of the filter cartridge, and the outer cleaning brush is located above the inner cleaning brush.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention connects an exhaust gas filter provided with a cleaning mechanism and a washing mechanism to the exhaust gas inlet of the heat exchanger, uses the exhaust gas filter to filter the exhaust gas, and uses a brush strip to elastically press the inner wall of the filter cartridge through an elastic member, thereby achieving filtration of the exhaust gas before heat exchange and online cleaning of the exhaust gas filter, so that the present invention improves the exhaust gas filtering effect and ensures that the heat exchanger can operate stably for a long time; by arranging 2-4 plate heat exchange units connected in sequence along the opposite edge direction in the heat exchanger, the fresh air and exhaust gas are discharged after heat exchange in their respective flow channels in a V-shaped, Z-shaped or wavy trend, thereby improving the heat exchange efficiency.

[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the waste gas treatment and heat recovery device of the present invention; Figure 2 It is a schematic structural diagram of the heat exchanger of the present invention; Figure 3 It is a partial structural diagram of a heat exchange unit of the heat exchanger of the present invention; Figure 4 This is a schematic diagram of the structure of the heat exchange units in the heat exchanger of the present invention connected in the same direction; Figure 5 It is a schematic diagram of the mirror connection mode 1 of the heat exchange unit in the heat exchanger of the present invention; Figure 6 It is a schematic diagram of the second mirror connection mode of the heat exchange unit in the heat exchanger of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the exhaust gas filter of the present invention in one direction; Figure 8It is a schematic diagram of the three-dimensional structure of the exhaust gas filter of the present invention in another direction; Fig. 9 This is a front view of the exhaust gas filter of the present invention; Fig.10 for Figure 7 A magnified view of part A; Fig.11 for Figure 8 An enlarged view of part B; Fig.12 It is a three-dimensional structural schematic diagram of the fresh air filter of the present invention; Fig.13 It is the front view of the fresh air filter of the present invention.

[0016] The numbers and corresponding names in the figure are: 1. Rack, 2. Heat exchanger, 21. Box, 22. Heat exchange unit, 221. Heat exchange plate, 2211. Bump, 2212. Depression, 2213. Boss, 222. Exhaust flow channel, 223. Fresh air flow channel, 23. Exhaust air inlet, 24. Fresh air outlet, 25. Fresh air inlet, 26. Exhaust gas outlet, 27. Flushing mechanism, 271. Liquid inlet main pipe, 272. Flushing pipe, 28. Liquid discharge mechanism, 281. Interface pipe, 282. Drain main pipe, 3. Exhaust air blower, 4. Fresh air filter, 41. Shell 2, 411. Fresh air inlet, 412. Fresh air outlet, 413. Strip hole, 42. Filter cartridge 2, 43. Cleaning pipe, 431. Support rod, 44. Snap joint, 45. Dust bag, 46. Protective cover, 5. Exhaust gas filter, 51. Shell 1, 511. Exhaust gas inlet, 512. Exhaust gas outlet, 513. Neck flange, 514. Partition, 515. Collection area, 516. Sealed door, 517. Adapter, 518. Window, 52. Filter cartridge 1, 521. Filter screen, 522. Cylinder body, 5221. Sealing plate, 5222. Support ribs, 53. External cleaning brush, 54. Internal cleaning brush assembly, 541. Brush strip, 542. Elastic member, 543.Fixed rod, 544.Bearing seat plate, 545.Bearing, 546. Fixed frame, 55. Spray pipe, 56. Driving mechanism, 6. Fresh air outlet fan, 7. Tianfangdiyuan conversion interface, 71. Observation window. DETAILED DESCRIPTION

[0017] A waste gas treatment and heat recovery device for a setting machine, such as Figure 1 , 2 As shown in Figures 7 and 12, the device includes a frame 1 and a heat exchanger 2, an exhaust air blower 3, an exhaust air filter 5, a fresh air blower 6 and a fresh air filter 4 installed on the frame 1. An exhaust air inlet 23 and a fresh air outlet 24 are provided on one side of the heat exchanger 2, and a fresh air inlet 25 and an exhaust air outlet 26 are provided on the other side of the heat exchanger 2. The exhaust air inlet 23 and the fresh air outlet 24 are respectively connected to the exhaust air outlet 512 of the exhaust air filter 5 and the fresh air exhaust port of the fresh air outlet 6 through the connecting piece Tianfangdiyuan rotating interface 7, and the Tianfangdiyuan interface 7 connected to the exhaust air outlet 512 of the exhaust air filter 5 is provided with an observation window 71. The fresh air inlet 25 and the exhaust air outlet 26 are respectively connected to the fresh air outlet 412 of the fresh air filter 4 and the exhaust air exhaust port of the exhaust air outlet 6 through the connecting piece Tianfangdiyuan rotating interface 7. Among them, the exhaust gas filter is used to receive the hot and humid exhaust gas discharged by the setting machine, and input it into the heat exchanger after filtering, so as to ensure that the exhaust gas entering the heat exchanger is relatively clean, so as to reduce the blockage of the heat exchanger and improve the heat exchange efficiency. The fresh air filter is used to filter the fresh air and introduce it into the heat exchanger, and then input it into the setting machine for fabric setting after heat exchange with the high-temperature exhaust gas in the heat exchanger, so as to save the energy consumption of heating the newly entered fresh air or air in the setting machine.

[0018] like Figure 2 , 3As shown, the heat exchanger 2 includes a box body 21, 2-4 plate heat exchange units 22 arranged in the box body 21 and connected in sequence along the opposite edge direction, as well as a flushing mechanism 27 and a drain mechanism 28. The heat exchanger 2 is used to form fresh air and exhaust gas in their respective flow channels in the box body 21 of the heat exchanger 2 in a V-shaped, Z-shaped or wavy trend, and then discharge them after heat exchange. The flushing mechanism 27 includes a plurality of flushing pipes 272 arranged inside the heat exchanger 2. The flushing pipes 272 are arranged close to the upper and lower inner walls of the heat exchanger 2, and are arranged at the head, end, and direction turning point of the exhaust gas flow channel 222 in a V-shaped, Z-shaped or wavy trend. Specifically, the heat exchange unit 22 is a rectangular parallelepiped or cube structure formed by stacking and fixing a plurality of heat exchange plates 221, a flow channel is formed between two adjacent heat exchange plates 221, and an exhaust gas flow channel 222 for exhaust gas to enter and exit is formed between two opposite side surfaces of the heat exchange unit 22, and a fresh air flow channel 223 is formed between the other two opposite side surfaces, and the exhaust gas flow channel 222 and the fresh air flow channel 223 are alternately arranged in the stacking direction of the heat exchange plates 221. The heat exchange plate 221 has a plurality of convex points 2211 evenly distributed on the surface of the exhaust gas flow channel 222 side, and a concave point 2212 is formed correspondingly on the fresh air flow channel 223 side at the corresponding positions of the convex points 2211 of the heat exchange plate 221. The heat exchange plate 221 also has convex columns 2213 evenly distributed on the surface of the side facing the fresh air flow channel 223, and the stacked adjacent heat exchange plates 221 are symmetrically arranged. All heat exchange units 22 are connected horizontally and sealed with a pair of edges in the horizontal direction in sequence to form a whole, and it is ensured that the highest edge and the lowest edge of all heat exchange units 22 are on the same horizontal plane. The edge-to-edge connection of two adjacent heat exchange units 22 can be connected side by side in the same direction (such as Figure 4 As shown), or the two can be connected in a mirror-symmetrical manner (as shown Figure 5 , 6As shown). When connected side by side in the same direction, all edges connected to the heat exchange unit 22 are in the same horizontal plane; when the two are connected in mirror symmetry, all edges connected to the heat exchange unit 22 may not be in the same horizontal plane. Preferably, the heat exchange unit 22 adopts a cube structure and is set at a 45° direction. The upper and lower edges and the front and rear surfaces of the heat exchange unit 22 are sealed and connected to the upper and lower inner walls of the box body 21 of the heat exchanger 2 and the inner walls on both sides of the box body 21 at the same time, and the outer edges of the heat exchange unit 22 located at the two ends are sealed and connected to the two end plates of the box body 21. The two end plates of the box body 21 are respectively provided with a window above and below the sealed connection with the edges of the heat exchange unit 22, and the four windows correspond to the exhaust gas inlet 23 and the fresh air outlet 24 on one side of the heat exchanger 2, and the fresh air inlet 25 and the exhaust gas outlet 26 on the other side of the heat exchanger 2. Among them, a fresh air filter is also sealed and installed at the fresh air outlet 24 by means of lateral pulling, which is used to further filter the fresh air and improve the quality of the fresh air introduced into the setting machine after heat exchange. A fresh air or exhaust gas turning zone is formed correspondingly above or below the connection between two adjacent heat exchange units 22. Both ends of the flushing pipe 272 are connected to the box body 21, and one end of all the flushing pipes 272 extends out of the box body 21 and is connected to the liquid inlet main pipe 271 at the lower end of the outer side of the box body 21 through a connecting pipe. The drainage mechanism 28 includes a plurality of drainage ports arranged at the bottom of the box body 21, an interface pipe 281 installed at the drainage port, and a drainage main pipe 282 that connects all the interface pipes 281 in series. Preferably, the flushing pipe 272 of the flushing mechanism 27 adopts a double-layer structure, including an inner pipe and an outer sleeve arranged outside the inner pipe, the two ends of the inner pipe are fixedly connected to the outer pipe, the inner pipe is provided with a plurality of rod spray holes along its axial direction, a nozzle is installed at the spray hole, and the outer sleeve is provided with a through hole with a diameter larger than the outer diameter of the nozzle at the nozzle, and the nozzle passes through the through hole. All inner pipes are connected through the liquid inlet main pipe 271, and all outer sleeves are connected through the air inlet main pipe.

[0019] When the heat exchanger of the present invention is working, the filtered waste gas enters from the waste gas inlet and is discharged through the waste gas outlet along the V-shaped, Z-shaped or wave-shaped waste gas flow channel. At the same time, the filtered fresh air enters from the fresh air inlet at the other end of the box body, exchanges heat with the waste gas along the V-shaped, Z-shaped or wave-shaped fresh air flow channel, and is discharged through the fresh air outlet and then introduced into the setting machine through the fresh air outlet fan. After the heat exchanger is used for a set time or when it is detected that the heat exchange efficiency is significantly reduced, the main control system automatically activates the flushing mechanism, first inputs high-pressure cleaning liquid into the inner tube of the flushing pipe through the liquid inlet main pipe to clean the waste gas flow channel of the heat exchange unit, and then inputs high-pressure gas into the outer tube of the flushing pipe for blowing and cleaning. The present invention uses multiple sets of plate heat exchange units connected in series to transfer heat between fresh air and waste gas, so that the heat energy of waste gas can be fully utilized to exchange heat with fresh air and then introduce the hot air into the setting machine, which improves the heat exchange efficiency between waste gas and fresh air while reducing the cost of fabric setting, and the box body is provided with a flushing pipe in front of the inlet of the waste gas flow channel of the heat exchange unit, so that online cleaning and drying can be achieved, which is convenient for cleaning the heat exchange plate and reduces the cleaning cost. The heat exchange area is increased and the heat exchange efficiency is improved through the structural design of the convex points and convex columns of the heat exchange plate. At the same time, the symmetrical installation of the heat exchange plate forms an effective support between two adjacent heat exchange plates, so that the structural stability of the heat exchange unit is good.

[0020] like Figure 7-11As shown, the exhaust gas filter 5 is provided with a shell 51, and a filter cartridge 52, a cleaning mechanism and a washing mechanism arranged in the shell 51. Among them, the shell 51 is a hexahedral shell structure, the exhaust gas inlet 511 of the exhaust gas filter 5 is a through hole opened on a side panel of the shell 51, the exhaust gas outlet 512 is a through hole opened on the front panel of the shell 51, and a neck flange 513 is sealed and installed at the exhaust gas outlet 512 to facilitate connection with the outside. A fixing hole is provided on the neck of the neck flange 513, and a fixing frame 546 with a straight, cross or Y-shaped structure can be detachably installed on the inner wall of the neck flange 513. The filter cartridge 52 is cylindrical, one end of the filter cartridge 52 is a closed end, and the other end is an open end. The open end of the filter cartridge 52 is rotatably and sealedly connected to the neck flange 513, and the closed end is rotatably connected to the rear panel of the shell 51. The filter cartridge 1 52 is provided with a cylinder 522 and a filter screen 521. The cylinder 522 is provided with a sealing plate 5221 constituting a closed end and a supporting rib 5222 arranged in an annular manner along the periphery of the sealing plate 5221. The supporting rib 5222 is made of angle steel or / and channel steel, and the filter screen 521 is sleeved on the supporting rib 5222. The sealing plate 5221 is also connected to the driving end of the driving mechanism 56 installed outside the housing 1 51 by installing a transmission assembly (such as a belt transmission assembly, a gear assembly, etc.). The cleaning mechanism includes an inner cleaning brush assembly 54 arranged inside the filter cartridge 1 52 and an outer cleaning brush 53 arranged outside the filter cartridge 1 52. The inner cleaning brush assembly 54 is provided with a brush strip 541, an elastic member 542 and a fixing rod 543. The brush strip 541 is composed of a brush seat and a brush wire clamped below the brush seat. The brush strip 541 is located on the side away from the exhaust gas inlet 511 and is located obliquely above the axis of the filter cartridge 1 52. The brush strip 541 is connected to one end of the elastic member 542, and its brush filaments are elastically pressed onto the inner wall of the filter cartridge 52 through the elastic member 542. The external cleaning brush 53 is also located on the side away from the exhaust gas inlet 511 and above the brush strip 541, and its brush filaments are pressed onto the outer wall of the filter cartridge 52. One end of the fixing rod 543 is fixedly installed at the center of the fixing frame 546, and the center of the sealing plate 5221 is detachably installed with a bearing seat plate 544 through bolts. The center of the bearing seat plate 544 is fixedly installed with a bearing 545, and the bearing seat plate 544 is fixed to the outer ring of the bearing 545, and the other end of the fixing rod 543 is inserted and fixed in the inner ring of the bearing 545. The elastic member 542 adopts an arc-shaped metal spring, one end of which is welded to the fixing rod 543, and the other end is fixed to the brush seat. Preferably, when the brush strip 541 is positioned, the brush seat does not contact the inner wall of the filter screen 521, but the lower end of the brush seat of the brush strip 541 is allowed to touch the support rib 5222 during the rotation of the filter cartridge 1 52, and a wear-resistant pad is attached to the side of the brush seat close to the filter screen 521. The cleaning mechanism is provided with a spray pipe 55, which is arranged inside the filter cartridge 1 52 and below the brush strip 541. The outer end of the spray pipe 55 is passed through an elbow joint and fixed at the fixing hole, and a support rod is welded to the inner end, and the other end of the support rod is fixed to the fixing rod 543.The shell 151 is provided with a collection area 515 at the corner of the outer side of the filter cartridge 152 below the brush strip 541. Specifically, a vertical partition 514 parallel to the axis of the filter cartridge 152 is provided on the bottom plate of the shell 151. The top of the partition 514 is higher than the lowest point of the filter cartridge 152 and lower than the height of the axis of the filter cartridge 152. The partition 514 is located directly below the side of the filter cartridge 152 away from the exhaust gas inlet 511. There is a gap between the top surface of the partition 514 and the outer wall of the filter cartridge 152. The partition 514 isolates the two sides of the bottom plate at the lower end of the shell 151 to form two isolation areas, one of which is the collection area 515, which is used to directly collect the dirt dropped by the filter cartridge or collect the dirt dropped by the filter cartridge through the built-in collection bag or collection frame. A collection port is also provided on the outer wall of the shell 151 at the collection area 515, and the collection port is provided with a closed door 516. The collection port is used to facilitate the cleaning of the dirt collected in the collection area 515. The partition plate 514 is provided with filter holes for connecting the isolation areas on both sides. The bottom plate of the shell 51 is provided with a drainage hole on the side of the non-collection area 515. The adapter 517 is installed at the drainage hole for connecting with an external sewage pipe to discharge the waste liquid after spray cleaning in the shell 51. The top plate of the shell 51 or the side panel away from the exhaust gas inlet 511 is provided with a window 518 for observing the working condition of the internal filter cartridge and the condition of the collection area 515.

[0021] When the exhaust gas filter of the present invention is working, the exhaust gas discharged from the setting machine enters from the exhaust gas inlet of the exhaust gas filter, the exhaust gas is filtered from the outside of the filter cartridge through the filter screen and enters the cylinder body, and then is discharged from the exhaust gas outlet; in this process, the filter cartridge is always driven by the driving mechanism to rotate, The brush wires of the external cleaning brush and the brush strips brush the inner and outer walls of the rotating filter. After a set time or other necessary circumstances (such as when the internal detection component detects that the filtration efficiency of the filter cartridge is significantly reduced), the spray pipe is started to blow and spray the filter by first blowing hot air and then spraying liquid. The exhaust gas filter of the present invention uses the external cleaning brush, brush strips and spray pipes arranged on the same side, and the brush strips of the internal cleaning brush assembly are pressed against the inner wall of the filter cartridge through elastic parts, so that the brush strips can brush more effectively and are more conducive to removing stubborn substances adhering to the surface of the filter, thereby realizing online cleaning of the filter cartridge and improving the cleaning effect. At the same time, the exhaust gas filtration effect is improved, and the water consumption during cleaning can be greatly reduced, which reduces the cleaning cost of the filter cartridge. By setting the fixing frame as a detachable structure, the repair and maintenance of the internal cleaning brush assembly is facilitated.

[0022] like Fig.12 , 13As shown, the fresh air filter 4 is provided with a housing 2 41, a filter cartridge 2 42 arranged in the housing 2 41, and a driving motor arranged outside the housing 2 41 and used to drive the filter cartridge 2 42 to rotate. The structure of the filter cartridge 2 42 is basically the same as that of the filter cartridge 1, and is also composed of a cylinder body and a filter screen sleeved outside the cylinder body, and is also open at one end and closed at the other end. The housing 2 41 is a hexahedral shell structure, and a fresh air inlet 411 is provided on a side wall of the housing 2 41 perpendicular to the axis of the filter cartridge 2, and a fresh air outlet 412 is provided on the front wall of the housing 2 41 at the connection with the open end of the filter cartridge 2 42. A neck flange is also installed at the fresh air outlet 412 to facilitate connection with the outside. A cleaning pipe 43 is provided in the filter cartridge 2 42, and the outer end of the cleaning pipe 43 is fixed to the neck flange at the fresh air outlet 412 through a bent joint, and the other end is fixed by a plurality of support rods 431 fixed to the neck of the neck flange. The fresh air filter 4 is also provided with a strip hole 413 on the outer wall of the second shell 41 near the cleaning pipe 43 side, and a dust bag 45 is installed at the strip hole 413, and a protective cover 46 is provided outside the dust bag 45. Preferably, a snap joint 44 is installed outside the second shell 41 and located at the strip hole 413, and the dust bag 45 is sealed and snapped on the snap joint 44 through its clamping plate. The protective cover 46 covers the dust bag 45 and the snap joint 44, and a take-in and put-out port is provided at the connection between the snap joint 44 and the dust bag 45, and a sealing door that can be opened by rotating is provided at the take-in and put-out port. An exhaust hole is provided on the second surface wall of the protective cover or the filter cartridge near the lower end of the dust bag, and the exhaust hole can be a dense small hole to facilitate the discharge of gas in the protective cover when the dust bag is collecting dust.

[0023] When the fresh air filter of the present invention is in use, fresh air enters from the fresh air inlet, and enters the heat exchange system from the fresh air outlet after being filtered by the filter. After working for a certain period of time or when it is detected that the fresh air volume entering the heat exchange system of the machine is significantly reduced, high-pressure gas is delivered to the air inlet pipe, and the high-pressure gas blows the dust or other debris accumulated on the surface of the filter to the dust bag, thereby cleaning the filter cartridge; when the dust bag is full of dust, the old dust bag can be taken out by opening the sealing door and replaced with a new one. The fresh air filter of the present invention is easy to use, and can also clean the filter cartridge online at any time without stopping the machine or production, thereby ensuring the cleaning and filtering effect of the filter cartridge, thereby improving the quality of the fresh air introduced into the setting machine after the heat exchange, and is also beneficial to improving the quality of fabric setting, etc., and reducing costs.

[0024] The present invention is not limited to the above-mentioned specific implementation modes. For ordinary technicians in this field, various changes made based on the above-mentioned conception without creative work all fall within the protection scope of the present invention.

Claims

1. A waste gas treatment and heat recovery device for a setting machine, comprising a heat exchanger, a waste gas outlet fan, a waste gas filter and a fresh air outlet fan; a waste gas inlet and a fresh air outlet are provided on one side of the heat exchanger, and the waste gas inlet and the fresh air outlet are respectively connected to the waste gas outlet of the waste gas filter and the fresh air exhaust port of the fresh air outlet fan through a connecting piece; a fresh air inlet and a waste gas outlet are provided on the other side of the heat exchanger, and the waste gas outlet is also connected to the waste gas exhaust port of the waste gas outlet fan through a connecting piece; characterized in that, The heat exchanger is provided with 2-4 plate heat exchange units connected in sequence along the opposite edge direction. The heat exchanger is used to make the fresh air and the exhaust gas be discharged after heat exchange in their respective flow channels in a V-shaped, Z-shaped or wavy trend; the exhaust gas filter is provided with a shell, a filter cartridge, a cleaning mechanism and a washing mechanism. The exhaust gas outlet is a through hole provided on a side wall of the shell, one end of the filter cartridge is a closed end, and the other end is an open end, and the two ends are rotatably connected to the shell, and the open end of the filter cartridge is sealed and connected to the exhaust gas outlet; the cleaning mechanism includes a separator An inner cleaning brush assembly and an outer cleaning brush are respectively arranged inside and outside the filter cartridge, and the inner cleaning brush assembly is provided with a brush strip, an elastic member and a fixing rod; the brush strip is located on the side away from the exhaust gas inlet and is located obliquely above the axis of the filter cartridge, the brush strip is connected to one end of the elastic member, and its brush wire is elastically crimped on the inner wall of the filter cartridge through the elastic member, and the other end of the elastic member is fixed on the fixing rod; the cleaning mechanism is provided with a spray pipe, the spray pipe is arranged inside the filter cartridge and below the brush strip, and one end of the spray pipe extends out of the exhaust gas filter.

2. The waste gas treatment and heat recovery device of a setting machine according to claim 1 is characterized in that: It also includes a fresh air filter, and the fresh air outlet of the fresh air filter is also connected to the fresh air inlet of the heat exchanger through a connecting piece.

3. The waste gas treatment and heat recovery device of a setting machine according to claim 2 is characterized in that: The fresh air filter is provided with a second filter cartridge, a cleaning pipe is provided inside the second filter cartridge, a strip hole is opened on the shell body of the fresh air filter near the cleaning pipe, a dust bag is installed at the strip hole, and a protective cover is provided outside the dust bag.

4. The waste gas treatment and heat recovery device of a setting machine according to claim 1 is characterized in that: A plurality of flushing pipes are arranged inside the heat exchanger. The flushing pipes are arranged close to the upper and lower inner walls of the heat exchanger and are arranged at the head, the end, and the direction turning point of the exhaust gas flow channel which is V-shaped, Z-shaped or wavy.

5. The waste gas treatment and heat recovery device of a setting machine according to claim 4 is characterized in that: One end of all the flushing pipes extends out of a side wall of a heat exchanger and is connected through a liquid inlet main pipe.

6. The waste gas treatment and heat recovery device of a setting machine according to claim 1 is characterized in that: The exhaust gas outlet of the exhaust gas filter is equipped with a fixing frame, one end of the fixing rod is fixed to the middle of the fixing frame, and the other end is rotatably installed at the center of the closed end of the filter cartridge through a bearing.

7. The waste gas treatment and heat recovery device of a setting machine according to claim 6 is characterized in that: A support rod is fixedly mounted on the fixing rod, and the other end of the support rod is fixedly connected to the end of the spray pipe close to a closed end of the filter cartridge.

8. The waste gas treatment and heat recovery device of a setting machine according to claim 1, characterized in that The connecting piece is a Tianfangdiyuan transfer interface, and the Tianfangdiyuan interface connected to the exhaust gas outlet of the exhaust gas filter is provided with an observation window.

9. The waste gas treatment and heat recovery device of a setting machine according to claim 1, characterized in that: The outer cleaning brush is pressed onto an outer wall of the filter cartridge, and is located above the inner cleaning brush.

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