Exhaust gas treatment and waste heat segmented recovery device and application of the recovery device to a forming machine

Abstract

The application provides a waste gas treatment and waste heat segmented recovery device and a setting machine using the recovery device, which comprises an automatic dust removal system, a first-stage heat energy recovery device, a second-stage heat energy recovery device, an electric field purification system, a waste gas exhaust fan, a circulating water treatment device, a fire-fighting and cleaning system, a recovery casing and a spraying system. The application has the beneficial effects that: high-temperature wax-containing oil fume gas volatilized from the setting machine can be subjected to two-stage heat energy exchange to obtain hot water, the cooling water (60C hot water) after the second-stage heat exchanger can be heated again, and the recovered hot water can be applied to production; and finally, the fume gas with a temperature of about 60C enters a high-voltage electrostatic field, and under the action of the high-voltage electrostatic field, most of the oil fume components in the fume gas are filtered out (purification rate > 96%), and then the fume gas is directly exhausted by the waste gas exhaust fan.

Description

Technical Field

[0001] This invention belongs to the field of waste gas treatment technology for stenters, and in particular relates to a waste gas treatment and waste heat recovery device and a stenter using the recovery device. Background Technology

[0002] Stenter machines are major energy-consuming equipment in the textile dyeing and finishing industry. Generally, the operating temperature of the drying oven is above 200°C for synthetic fibers, with exhaust gas temperatures above 170°C; for cotton fabrics, it's around 170°C, with exhaust gas temperatures around 150°C. Stenter machines consume 800,000-1,000,000 kcal / hour. It is estimated that only 20% of the heat energy consumed during fabric processing and setting is used, with approximately 10% lost through machine heat loss, and the remaining large amount (over 70%) dissipated into the atmosphere with the exhaust gas. This results in the release of fumes containing organic matter and dye auxiliaries, primarily composed of aldehydes, ketones, hydrocarbons, alcohols, acetic acid, and aromatic compounds, causing environmental pollution. While using hot air to dry, finish, and set fabrics, stenter machines generate large amounts of highly heat-generating fumes; if not utilized, this represents a waste of energy. Based on environmental protection and energy conservation considerations, project implementation is a crucial part of the company's planning. Furthermore, existing exhaust gas treatment and waste heat recovery systems are inadequate for treating stenter machine waste, resulting in low energy recovery efficiency. Summary of the Invention

[0003] In view of this, the present invention aims to provide a waste gas treatment and waste heat staged recovery device and a styling machine using the recovery device, so as to improve the waste gas recovery efficiency.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A waste gas treatment and waste heat recovery device includes an automatic dust removal system, a first-stage heat recovery device, a second-stage heat recovery device, an electric field purification system, a waste gas exhaust fan, a circulating water treatment device, a fire protection and cleaning system, a recovery housing, and a spray system. The recovery housing is a modular hollow cuboid structure. The automatic dust removal system, the first-stage heat recovery device, the second-stage heat recovery device, the electric field purification system, and the waste gas exhaust fan are arranged sequentially from left to right inside the recovery housing. The circulating water treatment device is located on one side of the recovery housing. The fire protection and cleaning system is located above and inside the recovery housing. The spray system is located inside the second-stage heat recovery device. The dust removal system, the first-stage heat recovery device, the spray system, the second-stage heat recovery device, and the electric field purification system are all used to treat the high-temperature exhaust gas from the stenter. The exhaust fan is used to discharge the high-temperature exhaust gas. The circulating water treatment device is used to treat the circulating water of the fire protection and cleaning system and the spray system. The bottom of the recovery housing near the automatic dust removal system has a high-temperature exhaust gas inlet, and the top of the recovery housing near the exhaust fan has a high-temperature exhaust gas outlet. The automatic dust removal system, the first-stage heat recovery device, the second-stage heat recovery device, the electric field purification system, the exhaust fan, the circulating water treatment device, the fire protection and cleaning system, and the spray system are all connected to the controller.

[0005] Furthermore, the automatic dust removal system includes a dust removal housing, a dust removal motor, a dust removal filter, a transmission assembly, a suction assembly, a dust removal cleaning assembly, and a shock absorption assembly. The dust removal housing is installed inside one end of the recycling machine housing, and the dust removal motor is installed on one side of the recycling machine housing. The output shaft of the dust removal motor passes through the side wall of the recycling machine housing and is connected to the upper side of the transmission assembly via a coupling. The dust removal filter is wound around the outside of the transmission assembly, and the transmission assembly is used to drive the dust removal filter to rotate. The suction assembly is installed on the bottom side of the transmission assembly, and the dust removal cleaning assembly is installed in the middle of the bottom of the transmission assembly. A shock absorption assembly is installed at each of the two ends of the bottom of the transmission assembly. The dust removal motor, the suction assembly, and the dust removal cleaning assembly are all connected to the controller.

[0006] Furthermore, the first-stage heat energy recovery device includes a first gas-to-gas exchanger, a connecting channel, a second gas-to-gas exchanger, and a blower. The first gas-to-gas exchanger, the connecting channel, and the second gas-to-gas exchanger are all installed inside the recovery housing. The first gas-to-gas exchanger is located on the right side of the automatic dust removal system. The right side of the first gas-to-gas exchanger is connected to the second gas-to-gas exchanger through the connecting channel. The first gas-to-gas exchanger and the second gas-to-gas exchanger are symmetrically arranged. One side of the second gas-to-gas exchanger is connected to the blower, and the blower is installed outside the recovery housing.

[0007] Furthermore, the spraying system includes a connecting main pipe, several spraying branch pipes, and several spraying components. The connecting main pipe is installed on one side of the recycling machine casing. One end of the connecting main pipe is connected to the pipeline of the circulating water treatment device. The other end of the connecting main pipe is axially and evenly connected to several spraying branch pipes. Each spraying branch pipe is installed inside the recycling machine casing, and each spraying branch pipe is axially and evenly connected to a spraying component.

[0008] Furthermore, the second-stage heat recovery device includes a radiator module, a heating water tank, and a demister. The radiator module is located inside the recovery housing. The radiator module is equipped with a spray system and a demister. A heating water tank is located on one side of the radiator module and is installed on the outside of the recovery housing.

[0009] Furthermore, the electric field purification system includes a first electric field group, a second electric field group, a third electric field group, a fourth electric field group, and two sets of electric field equalization networks. The first electric field group, the second electric field group, the third electric field group, and the fourth electric field group are arranged sequentially from left to right inside the recovery housing. One set of electric field equalization networks is installed on the left side of the first electric field group and the right side of the fourth electric field group, and both sets of electric field equalization networks are installed inside the recovery housing.

[0010] Furthermore, the circulating water treatment device includes a filter structure, a treatment tank mechanism, and an oil skimming mechanism. The filter structure is installed at one end of the treatment tank mechanism, and the oil skimming mechanism is installed inside the other end of the treatment tank mechanism.

[0011] Furthermore, the fire protection and cleaning system includes a temperature monitoring module, a fire protection and cleaning control module, and a fire protection and cleaning component. The temperature monitoring module and the fire protection and cleaning control module are both installed outside the recycling machine housing. The temperature monitoring module is used to monitor the temperature of each section of the recycling machine housing. The fire protection and cleaning control module is used to control the on / off state of the cleaning component. The fire protection and cleaning component is installed inside and outside the recycling machine housing. The fire protection and cleaning component is used to clean the recycling machine housing and its interior. The temperature monitoring module, the fire protection and cleaning control module, and the fire protection and cleaning component are all connected to the controller.

[0012] Furthermore, a stenter includes a stenter, wherein the waste gas treatment and waste heat segmented recovery device is disposed above the stenter.

[0013] Compared with existing technologies, the waste gas treatment and waste heat staged recovery device and the stenter using the recovery device described in this invention have the following advantages: The waste gas treatment and waste heat recovery device and the stenter using the recovery device described in this invention, wherein high-temperature waxy and oily fume gas volatilized from the stenter is drawn out by the stenter's exhaust fan and enters the first-stage heat exchanger for gas-water heat exchange. The cooling water (60°C hot water) after passing through the second-stage heat exchanger is reheated so that the recovered hot water can be used in production; the flue gas discharged from the first-stage heat exchanger enters the spray box to filter out large particles and lint; the waste gas filtered by the spray box enters the second-stage heat exchanger to heat the cooling water while simultaneously cooling the stenter's waste gas temperature to 60°C before entering the electric field; finally, the flue gas at approximately 60°C enters the high-voltage electrostatic field, where most of the oily fume components in the flue gas are filtered out under the action of the high-voltage electrostatic field (purification rate >96%), and then directly exhausted by the exhaust fan. Attached Figure Description

[0014] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the structure of the two sets of waste gas treatment and waste heat staged recovery devices described in the embodiments of the present invention; Figure 2 This is a schematic diagram of the waste gas treatment and waste heat recovery device according to an embodiment of the present invention; Figure 3 This is a cross-sectional schematic diagram of the waste gas treatment and waste heat recovery device according to an embodiment of the present invention; Figure 4 This is a longitudinal sectional schematic diagram of the waste gas treatment and waste heat recovery device according to an embodiment of the present invention; Figure 5 This is a front view diagram of the automatic dust removal system according to an embodiment of the present invention; Figure 6 This is a back view schematic diagram of the automatic dust removal system according to an embodiment of the present invention; Figure 7 This is a bottom view schematic diagram of the automatic dust removal system according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the automatic dust removal system according to an embodiment of the present invention; Figure 9 for Figure 8 Enlarged diagram of C in the middle; Figure 10 This is a partial forward view of the automatic dust removal system according to an embodiment of the present invention; Figure 11 This is a partial oblique schematic diagram of the automatic dust removal system according to an embodiment of the present invention; Figure 12 This is a schematic diagram of the suction assembly described in an embodiment of the present invention; Figure 13 This is a partial schematic diagram of the air intake assembly described in an embodiment of the present invention; Figure 14 This is a schematic diagram of the blower converter according to an embodiment of the present invention; Figure 15 This is a schematic diagram of a blower converter with a blower cover removed according to an embodiment of the present invention; Figure 16 This is a front view schematic diagram of the blower converter with the blower cover removed according to an embodiment of the present invention; Figure 17 This is a back view schematic diagram of the blower converter excluding the blower housing according to an embodiment of the present invention; Figure 18 This is a schematic diagram of the first gas-to-gas exchanger according to an embodiment of the present invention; Figure 19 This is a partial schematic diagram of the first-stage heat recovery device according to an embodiment of the present invention; Figure 20 This is a schematic diagram of the second gas-to-gas exchanger according to an embodiment of the present invention; Figure 21 This is a schematic diagram of the second-stage heat recovery device according to an embodiment of the present invention; Figure 22 This is a front view schematic diagram of the first heat sink according to an embodiment of the present invention; Figure 23 This is a back view diagram of the first heat sink according to an embodiment of the present invention; Figure 24 This is a front view schematic diagram of the fourth heat sink according to an embodiment of the present invention; Figure 25 This is a back view diagram of the fourth heat sink according to an embodiment of the present invention; Figure 26 This is a schematic diagram of the demister according to an embodiment of the present invention; Figure 27 for Figure 26 An enlarged diagram of E in the figure; Figure 28 This is a partial schematic diagram of the left side of the electric field purification system according to an embodiment of the present invention; Figure 29 This is a partial schematic diagram of the right side of the electric field purification system according to an embodiment of the present invention; Figure 30 This is a schematic diagram of the first electric field group according to an embodiment of the present invention; Figure 31 This is a schematic diagram of the spray system described in an embodiment of the present invention; Figure 32 for Figure 31 An enlarged diagram of D in the diagram; Figure 33 This is a schematic diagram of the circulating water treatment device according to an embodiment of the present invention; Figure 34 This is a schematic diagram of the circulating water treatment device according to an embodiment of the present invention from one angle; Figure 35 for Figure 34 Enlarged diagram of A in the middle; Figure 36 This is a schematic diagram of the circulating water treatment device according to an embodiment of the present invention from angle two; Figure 37 for Figure 36 Enlarged diagram of B in the middle; Figure 38 This is a schematic diagram of the first water-blocking plate according to an embodiment of the present invention; Figure 39 This is a schematic diagram of the filter structure described in an embodiment of the present invention; Figure 40 This is a schematic diagram of the filter structure at an angle according to an embodiment of the present invention; Figure 41 This is a schematic diagram of the filter structure at angle two according to an embodiment of the present invention; Figure 42 This is a schematic diagram of the filter structure after removing the waterproof filter cover according to an embodiment of the present invention; Figure 43 This is a schematic diagram of the fire protection and cleaning system described in an embodiment of the present invention.

[0015] Figure 44 This is a schematic diagram of the method for automatic online operation of the all-in-one machine as described in Embodiment 2 of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Automatic dust removal system; 11. Dust collector housing; 111. Upper sealing plate; 112. Dust collector bottom plate; 113. Front sealing plate; 114. Front baffle; 115. Rear sealing plate; 116. Rear baffle; 117. Upper left support plate; 118. Lower left support plate; 119. Upper right support plate; 1110. Lower right support plate; 1111. Left sealing plate; 1112. Right sealing plate; 12. Dust collector motor; 13. Dust collector filter screen; 14. Transmission assembly; 141. Drive roller ; 142. First driven roller; 143. Second driven roller; 15. Suction assembly; 151. First suction pipe; 152. Second suction pipe; 153. First suction chamber shell; 1531. Mounting shell; 1532. Left protective shell; 1533. Right protective shell; 1534. First suction plate; 154. Second suction chamber shell; 16. Dust removal and cleaning assembly; 161. Dust removal and cleaning pipeline; 162. Air blower converter; 1621. Air blower cover; 162 2. Air pressure regulator; 1623. Air pressure gauge; 1624. Main air duct; 1625. First air duct; 1626. Second air duct; 1627. Angle iron fastener; 1628. Air duct housing; 1629. Conversion assembly; 16291. Cylinder support; 16292. Conversion cylinder; 16293. First conversion plate; 16294. Second conversion plate; 16295. Third conversion plate; 16296. First damper shaft; 1 6297, Second damper shaft; 16298, First damper plate; 16299, Second damper plate; 162910, First silicone pad; 162911, Second silicone pad; 162912, First conversion pressure plate; 162913, Second conversion pressure plate; 16210, Air inlet end plate; 17, Vibration damping assembly; 171, First spring top block; 172, Vibration damping spring; 173, Second spring top block; 18, Support inclined plate; 19, Guide roller; 2. First-stage heat recovery device; 21. First air-to-air exchanger; 211. First air-to-air exchanger body; 212. Air outlet flange; 213. Air inlet channel; 22. Connecting channel; 23. Second air-to-air exchanger; 231. Second air-to-air exchanger body; 232. Air inlet flange; 233. Air outlet channel; 24. Blower; 25. Air distribution mesh frame; 3. Second-stage heat recovery device; 31. First radiator; 311. First heat dissipation frame; 312. First water inlet pipe; 313. First water outlet pipe; 314. First circulation chamber; 315. First partition plate; 316. First circulation pipe; 317. Second circulation chamber; 318. Second partition plate; 319. First heat dissipation fixing plate; 3110. First heat dissipation pipe; 32. Second radiator; 33. Third radiator; 34. Fourth radiator; 341. Second heat dissipation frame; 342. Second water inlet pipe; 343. Second water outlet pipe; 344. Third circulation chamber; 345. Third partition plate 346. Third circulation pipe; 347. Fourth circulation chamber; 348. Fourth partition; 349. Second heat dissipation fixing plate; 3410. Second heat dissipation pipe; 35. Heating small water tank; 351. Small water tank body; 352. Heating centrifugal pump; 353. Heating inlet pipe; 354. First heating water supply pipe; 355. Second heating water supply pipe; 356. Overflow pipe; 357. Return water pipe; 36. Demister; 361. Demister housing; 362. Demister baffle; 363. First demister plate; 3631. Demister plate body; 3632. Demister hook; 364. Second demister plate; 4. Electric field purification system; 41. First electric field group; 411. Electric field water-blocking component; 4111. First electric field water-blocking frame; 4112. First electric field water-blocking plate; 4113. Second electric field water-blocking plate; 4114. First electric field water-blocking sealing plate; 4115. Second electric field water-blocking sealing plate; 412. Electric field module; 413. Electric field bottom frame; 42. Second electric field group; 43. Third electric field group; 44. Fourth electric field group; 45. Electric field air distribution network; 5. Exhaust gas exhaust fan; 6. Circulating water treatment device; 61. Filter structure; 611. Filter waterproof cover; 6111. Filter front side plate; 6112. Filter rear side plate; 6113. Filter right side plate; 6114. Filter left side plate; 6115. Filter top plate; 6116. Filter inlet pipe; 612. First filter assembly; 6121. Filter serrations; 6122. Filter bottom plate; 6123. Filter baffle; 613. Second filter assembly; 614. Overflow filter assembly; 615. Filter mounting plate; 62. Treatment box mechanism; 621. Treatment box body; 6211. Treatment drain pipe; 6212. Treatment oil drain pipe; 622. First water baffle; 623. Filter plate assembly; 6231. First filter screen; 6232. Second filter screen; 6233. Second water baffle; 624. Treatment box water pump; 625. First one-way water baffle 63. Scraping mechanism; 631. First scraping assembly; 6311. First scraping motor; 6312. Scraping bar; 6313. First scraping plate; 6314. Scraping groove plate; 632. Second scraping assembly; 6321. Second scraping motor; 6322. Scraping transmission assembly; 63221. Scraping drive sprocket; 63222. Scraping transmission chain; 63223. Scraping driven sprocket; 6323. 6324. Oil scraper roller; 6325. Second oil scraper; 6326. Oil discharge slant pipe; 6327. Oil separator plate; 633. Overflow assembly; 6331. Overflow chamber; 6332. Overflow pipe; 6333. Water separator plate; 64. Circulating water cleaning assembly; 641. Cleaning steam pipe; 642. Cleaning Y-type angle seat valve; 643. Cleaning pneumatic box; 65. Water replenishment assembly; 651. Water replenishment pipe; 66. Temperature probe of treatment tank; 7. Fire protection and cleaning system; 71. Exhaust gas inlet temperature sensor; 72. Fresh air outlet temperature sensor; 73. First hot air exchange temperature sensor; 74. Fresh air inlet temperature sensor; 75. Second hot air exchange temperature sensor; 76. Pretreatment temperature sensor; 77. Electric field temperature sensor; 78. Exhaust gas outlet temperature sensor; 79. Filter screen air blowing valve; 710. Filter screen cleaning valve; 711. Steam fire extinguishing valve; 712. First-stage hot air exchange cleaning valve; 713. Second-stage exchange cleaning valve one; 714. Second-stage exchange cleaning steam valve one; 715. Spray valve; 716. Second-stage exchange cleaning valve two; 717. Second-stage exchange cleaning steam valve two; 718. Electric field flushing valve one; 719. Electric field flushing valve two; 720. Electric field flushing valve three; 721. Electric field flushing valve four; 8. Recycling casing; 9. Sprinkler system; 91. Connecting main pipe; 92. Sprinkler branch pipe; 93. Sprinkler assembly; 931. Sprinkler connector; 932. Sprinkler nozzle. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] like Figures 1 to 43As shown, the waste gas treatment and waste heat recovery device includes an automatic dust removal system 1, a first-stage heat energy recovery device 2, a second-stage heat energy recovery device 3, an electric field purification system 4, a waste gas exhaust fan 5, a circulating water treatment device 6, a fire protection and cleaning system 7, a recovery housing 8, and a spray system 9. The recovery housing 8 is a modular hollow cuboid structure. The automatic dust removal system 1, the first-stage heat energy recovery device 2, the second-stage heat energy recovery device 3, the electric field purification system 4, and the waste gas exhaust fan 5 are arranged sequentially from left to right inside the recovery housing 8. The circulating water treatment device 6 is located on one side of the recovery housing 8. The fire protection and cleaning system 7 is located above and inside the recovery housing 8. The spray system 9 is located inside the second-stage heat energy recovery device 3. The automatic dust removal system 1, the first-stage heat energy recovery device 2, the second-stage heat energy recovery device 3, the electric field purification system 4, and the waste gas exhaust fan 5 are arranged sequentially from left to right inside the recovery housing 8. The circulating water treatment device 6 is located on one side of the recovery housing 8. The fire protection and cleaning system 7 is located above and inside the recovery housing 8. The spray system 9 is located inside the second-stage heat energy recovery device 3. Unit 2, spray system 9, second-stage heat recovery device 3, and electric field purification system 4 are all used to treat the high-temperature exhaust gas from the stenter. The exhaust fan 5 is used to discharge the high-temperature exhaust gas. The circulating water treatment device 6 is used to treat the circulating water from the fire protection and cleaning system 7 and the spray system 9. The bottom of the recovery housing 8 near the automatic dust removal system 1 has a high-temperature exhaust gas inlet, and the top of the recovery housing 8 near the exhaust fan 5 has a high-temperature exhaust gas outlet. The automatic dust removal system 1, the first-stage heat recovery device 2, the second-stage heat recovery device 3, the electric field purification system 4, the exhaust fan 5, the circulating water treatment device 6, the fire protection and cleaning system 7, and the spray system 9 are all connected to a controller. The controller is existing technology and can be an industrial computer, model iPC-610L.

[0022] A stenter includes the aforementioned waste gas treatment and waste heat recovery device, wherein there are two sets of the waste gas treatment and waste heat recovery device, which are symmetrically arranged above the stenter.

[0023] In a preferred embodiment of the present invention, the automatic dust removal system 1 includes a dust removal housing 11, a dust removal motor 12, a dust removal filter 13, a transmission assembly 14, a suction assembly 15, a dust removal cleaning assembly 16, and a shock absorption assembly 17. The dust removal housing 11 is installed inside one end of the recycling housing 8. The dust removal motor 12 is installed on one side of the recycling housing 8. The output shaft of the dust removal motor 12 passes through the side wall of the recycling housing 8 and is connected to the upper side of the transmission assembly 14 via a coupling. The dust removal filter 13 is wrapped around the outside of the transmission assembly 14. The transmission assembly 14 is used to drive the dust removal filter 13 to rotate. The suction assembly 15 is installed on the bottom side of the transmission assembly 14. The dust removal cleaning assembly 16 is installed in the middle of the bottom of the transmission assembly 14. A shock absorption assembly 17 is installed at each of the two ends of the bottom of the transmission assembly 14. The dust removal motor 12, the suction assembly 15, and the dust removal cleaning assembly 16 are all connected to a controller. The model of the dust removal motor 12 can be SK1S175. The suction component 15 is used to adsorb dust from the dust filter screen 13, the dust cleaning component 16 is used to clean the dust filter screen 13, and the shock absorption component 17 is used to reduce the vibration of the dust filter screen 13 and the transmission component 14 during transmission.

[0024] In a preferred embodiment of the present invention, the automatic dust removal system 1 further includes a supporting inclined plate 18. The supporting inclined plate 18 has an arc-shaped structure and is located at the bottom inside the dust removal filter screen 13. Both ends of the supporting inclined plate 18 are connected to the inner wall of the dust removal housing 11. The supporting inclined plate 18 is used to support the dust removal filter screen 13 and prevent the dust removal filter screen 13 from malfunctioning.

[0025] In a preferred embodiment of the present invention, the automatic dust removal system 1 further includes a guide roller 19, which is mounted above the suction assembly 15 and located outside the dust filter screen 13. The guide roller 19 is used to prevent the dust filter screen 13 from shifting when it is sucked up by the suction assembly 15.

[0026] In a preferred embodiment of the present invention, the automatic dust removal system 1 further includes a partition screen, which is installed on the front side of the dust removal housing 11 for preliminary filtration of high-temperature flue gas. In actual use, the partition screen is detachably installed inside the recovery housing 8 and located on the front side of the dust removal housing 11.

[0027] In a preferred embodiment of the present invention, the dust collector housing 11 includes an upper sealing plate 111, a dust collector bottom plate 112, a front sealing plate 113, a front baffle 114, a rear sealing plate 115, a rear baffle 116, a left upper support plate 117, a left lower support plate 118, a right upper support plate 119, a right lower support plate 1110, a left sealing plate 1111, and a right sealing plate 1112. The front sealing plate 113 and the rear sealing plate 115 are respectively installed on the front and rear sides of the upper sealing plate 111. The left upper support plate 117 and the right upper support plate 119 are respectively installed on the left and right sides of the upper sealing plate 111. The four corners of the upper sealing plate 111 are respectively installed to the four corners of the dust collector bottom plate 112 via a square tube frame. A front baffle 114 and a rear baffle 116 are respectively installed on the front and rear sides of the dust collector base plate 112. A lower left support plate 118 and a lower right support plate 1110 are respectively installed on the left and right sides of the dust collector base plate 112. The coupling of the dust collector motor 12 is installed to the upper right support plate 119. A shock-absorbing component 17 is installed on one side of the lower left support plate 118 and the lower right support plate 1110. A dust removal cleaning component 16 is installed in the middle of the lower left support plate 118 and the lower right support plate 1110. The left sealing plate 1111 is installed between the upper left support plate 117 and the lower left support plate 118, and the right sealing plate 1112 is installed between the upper right support plate 119 and the lower right support plate 1110. The dust collector housing 11 provides support for the automatic dust removal system 1.

[0028] In a preferred embodiment of the present invention, the cross-section of the dust removal base plate 112 is an arc-shaped structure. The arc-shaped structure is designed to facilitate the storage of lint and dust. In actual use, cleaning windows are also provided on the lower left support plate 118 and the lower right support plate 1110, so that workers can clean the lint and dust accumulated on the dust removal base plate 112 by opening the cleaning windows.

[0029] In a preferred embodiment of the present invention, the transmission assembly 14 includes a drive roller 141, a first driven roller 142, and a second driven roller 143. The two ends of the drive roller 141 are respectively mounted to the upper left support plate 117 and the upper right support plate 119. The central axis of the drive roller 141 is connected to the coupling of the dust removal motor 12. The two ends of the first driven roller 142 and the second driven roller 143 are respectively connected to the lower left support plate 118 and the lower right support plate 1110. A shock-absorbing assembly 17 is installed at each end of the central axis of the second driven roller 143. The drive roller 141, the first driven roller 142, and the second driven roller 143 are all located within the dust removal filter screen 13. In actual use, the dust removal filter screen 13 has a closed-loop structure, and the rotation of the drive roller 141, the first driven roller 142, and the second driven roller 143 drives the dust removal filter screen 13 to rotate.

[0030] In a preferred embodiment of the present invention, the suction assembly 15 includes a suction fan, a first suction pipe 151, a second suction pipe 152, a first suction chamber shell 153, and a second suction chamber shell 154. The pipes of the suction fan are connected to one end of the first suction pipe 151 and one end of the second suction pipe 152, respectively. The other end of the first suction pipe 151 is connected to one side of the first suction chamber shell 153, and the other end of the second suction pipe 152 is connected to one side of the second suction chamber shell 154. The first suction chamber shell 153 and the second suction chamber shell 154 are located on both sides of the dust removal filter screen 13, respectively. The suction fan is signal-connected to the controller. In this embodiment, dust on the outside of the dust filter 13 can be sucked through the first suction pipe 151 and the first suction chamber shell 153, and dust on the inside of the dust filter 13 can be sucked through the second suction pipe 152 and the second suction chamber shell 154. In actual use, an electromagnetic switch valve can be provided on both the first suction pipe 151 and the second suction pipe 152 to control the opening and closing of the first suction pipe 151 and the second suction pipe 152. The electromagnetic switch valve signal is connected to the controller, and the controller controls the opening and closing of the electromagnetic switch valve, thereby controlling the opening and closing of the first suction pipe 151 and the second suction pipe 152. The suction fan is existing technology, and the model can be selected independently according to the actual situation.

[0031] In a preferred embodiment of the present invention, the first suction chamber shell 153 includes a mounting shell 1531, a left protective shell 1532, a right protective shell 1533, and a first suction plate 1534. The mounting shell 1531 has a U-shaped shell structure. The left protective shell 1532 and the right protective shell 1533 are symmetrically installed inside the mounting shell 1531. The connection between the left protective shell 1532 and the right protective shell 1533 is connected to one end of the first suction pipe 151. One end of the left protective shell 1532 and one end of the right protective shell 1533 are respectively connected to the first suction plate 1534. The first suction plate 1534 is located outside the dust filter 13, and a plurality of first suction holes are formed on the first suction plate 1534. In this embodiment, the arrangement of the first suction chamber shell 153 can improve the adsorption of dust by the suction fan on the dust filter 13.

[0032] In a preferred embodiment of the present invention, the second suction chamber shell 154 is a hollow cuboid structure, and a plurality of second suction holes are provided on the side of the second suction chamber shell 154 near the inner side of the dust removal filter screen 13. In this embodiment, the arrangement of the second suction chamber shell 154 can improve the adsorption of dust by the suction fan on the dust removal filter screen 13.

[0033] In a preferred embodiment of the present invention, the dust removal and cleaning assembly 16 includes a blower, a dust removal and cleaning pipeline 161, and a blower converter 162. The air outlet of the blower is connected to the dust removal and cleaning pipeline 161 through the blower converter 162. The dust removal and cleaning pipeline 161 is installed in the middle of the lower left support plate 118 and the lower right support plate 1110. The blower converter 162 is used to supply air to the two sets of waste gas treatment and waste heat segmented recovery devices.

[0034] In a preferred embodiment of the present invention, the dust removal and cleaning assembly 16 further includes air blowing nozzles 163. Multiple air blowing nozzles 163 are axially and evenly installed on the dust removal and cleaning pipeline 161. In this embodiment, each air blowing nozzle 163 includes an air blowing connector and a nozzle body. One end of the air blowing connector is threaded into the dust removal and cleaning pipeline 161, and the other end of the air blowing connector is fitted with the nozzle body, which has a fan-shaped structure. In actual use, the airflow converted from the air blowing converter 162 sequentially passes through the dust removal and cleaning pipeline 161 and the air blowing nozzles 163 to clean the dust removal filter screen 13. The cleaned dust falls onto the dust removal base plate 112.

[0035] In a preferred embodiment of the present invention, the dust removal and cleaning assembly 16 includes a cleaning water pump and a dust removal and cleaning pipeline 161. The water inlet of the cleaning water pump is connected to the pipeline of the circulating water treatment device 6, and the water outlet of the cleaning water pump is connected to the dust removal and cleaning pipeline 161 through a pipeline. The dust removal and cleaning pipeline 161 is installed in the middle of the lower left support plate 118 and the lower right support plate 1110.

[0036] In a preferred embodiment of the present invention, the dust removal and cleaning assembly 16 further includes dust removal nozzles. Multiple dust removal nozzles are axially and evenly installed on the dust removal and cleaning pipeline 161. In this embodiment, each dust removal nozzle includes a dust removal connector and a nozzle body. One end of the dust removal connector is threaded into the dust removal and cleaning pipeline 161, and the other end of the dust removal connector is fitted with the nozzle body, which has a fan-shaped structure. In actual use, water pumped from the cleaning pump sequentially passes through the dust removal and cleaning pipeline 161 and the dust removal nozzles to clean the dust removal filter screen 13. The wastewater from the cleaning falls onto the dust removal base plate 112 and then flows from the dust removal base plate 112 into the drainage trough of the recovery housing 8.

[0037] In a preferred embodiment of the present invention, the blower converter 162 includes a blower housing 1621, a main blower pipe 1624, a first blower pipe 1625, a second blower pipe 1626, an angle iron fixing member 1627, a blower shell 1628, a conversion assembly 1629, and an air inlet end plate 16210. The blower housing 1621 has a U-shaped structure. The blower shell 1628 is installed inside the blower housing 1621 through the angle iron fixing member 1627. One end of the blower shell 1628 is connected to the main blower pipe 1624, and the air inlet end plate 16210 is installed at the other end of the blower shell 1628. The first blower pipe 1625 and the second blower pipe 1626 are nested on the air inlet end plate 16210. The first blower pipe 1625 and the second blower pipe 1626 are both connected to the blower housing 1628. A conversion component 1629 is installed on the upper end of the blower housing 1628, and the lower end of the conversion component 1629 is located inside the blower housing 1628. The conversion component 1629 is used to control the opening and closing of the first blower pipe 1625 and the second blower pipe 1626. In actual use, the lower end of the conversion component 1629 is located inside the blower housing 1628 near the first blower pipe 1625 and the second blower pipe 1626. In this embodiment, the blower converter 162 can provide airflow for two sets of exhaust gas treatment and waste heat segmented recovery devices, which can save the cost of the blower.

[0038] In a preferred embodiment of the present invention, the blower converter 162 further includes a blower pressure regulator 1622 and a blower pressure gauge 1623. The blower pressure regulator 1622 and the blower pressure gauge 1623 are both installed on the blower housing 1621 and are both installed on one side of the main blower pipe 1624.

[0039] In a preferred embodiment of the present invention, the conversion assembly 1629 includes a cylinder support 16291, a conversion cylinder 16292, a first conversion plate 16293, a second conversion plate 16294, a third conversion plate 16295, a first damper shaft 16296, a second damper shaft 16297, a first damper plate 16298, and a second damper plate 16299. One end of the cylinder support 16291 is mounted to one side of the blower housing 1628, and the other end of the cylinder support 16291 is mounted with the conversion cylinder 16292. The telescopic rod of the conversion cylinder 16292 is connected to the short side of the first conversion plate 16293. The first conversion plate 16293 has an L-shaped structure, and the long side of the first conversion plate 16293 is connected to the first conversion plate 16293. One end of the first conversion plate 16293 and one end of the second conversion plate 16294 are movably connected. The other end of the first conversion plate 16293 is movably connected to the first damper shaft 16296, and the other end of the second conversion plate 16294 is movably connected to the second damper shaft 16297. The first damper shaft 16296 is axially rotatably connected to the first damper plate 16298, and the second damper shaft 16297 is axially rotatably connected to the second damper plate 16299. The first damper plate 16298 and the second damper plate 16299 are symmetrically arranged. Both the first damper plate 16298 and the second damper plate 16299 are installed on the air inlet end plate 16210. The conversion cylinder 16292 is existing technology and can be a MI series CA type stainless steel mini cylinder [FY- [20-80-CA]-1, In actual use, the telescopic rod of the switching cylinder 16292 extends and retracts, causing the first switching plate 16293 to move back and forth (the telescopic rod of the switching cylinder 16292 can be connected to the first switching plate 16293 via a pin, or it can be fixedly connected, as long as it can drive the first switching plate 16293 to move back and forth). The back and forth movement of the first switching plate 16293 causes the second switching plate 16294 and the third switching plate 16295 to rotate (in actual use, in order to enable the back and forth movement of the first switching plate 16293 to drive the rotation of the second switching plate 16294 and the third switching plate 16295, a long through hole can be opened at the connection between the first switching plate 16293 and the second switching plate 16294 and the third switching plate 16295). This allows the second conversion plate 16294 and the third conversion plate 16295 to rotate without interfering with their circular motion around the first damper shaft 16296 and the second damper shaft 16297. The rotation of the second conversion plate 16294 and the third conversion plate 16295 drives the first damper shaft 16296 and the second damper shaft 16297 to rotate. The rotation of the first damper shaft 16296 and the second damper shaft 16297 then drives the first damper plate 16298 and the second damper plate 16299 to move back and forth, respectively. (In actual use, to ensure that the rotation of the first damper shaft 16296 and the second damper shaft 16297 drives the first damper plate 16298 and the second damper plate 16299 to move back and forth, respectively...)Racks can be provided on the first damper plate 16298 (second damper plate 16299), and gears can be fitted on the first damper shaft 16296 (second damper shaft 16297). Through the meshing of the racks and gears, the first damper shaft 16296 and the second damper shaft 16297 rotate, thereby driving the first damper plate 16298 and the second damper plate 16299 to move back and forth. This movement of the first and second damper plates 16298 and 16299 controls whether their ventilation holes overlap or separate from the ventilation holes of the first silicone pad 162910 and the second silicone pad 162911, thus controlling the opening and closing of the first air pipe 1625 and the second air pipe 1626.

[0040] In a preferred embodiment of the present invention, the conversion component 1629 further includes a first silicone pad 162910 and a second silicone pad 162911. The first silicone pad 162910 is installed on the first damper plate 16298, and its side is connected to the first air duct 1625. The second silicone pad 162911 is installed on the second damper plate 16299, and its side is connected to the second air duct 1626. In this embodiment, the first silicone pad 162910 and the second silicone pad 162911 provide a sealing function for the first air duct 1625 and the second air duct 1626.

[0041] In a preferred embodiment of the present invention, the conversion assembly 1629 further includes a first conversion pressure plate 162912 and a second conversion pressure plate 162913. The first conversion pressure plate 162912 is coaxially connected to the first silicone pad 162910 and is located inside the first air blowing pipe 1625. The second conversion pressure plate 162913 is coaxially connected to the second silicone pad 162911 and is located inside the second air blowing pipe 1626. In this embodiment, the first conversion pressure plate 162912 and the second conversion pressure plate 162913 are used to cooperate with the first silicone pad 162910, the second silicone pad 162911, and connect to the first air blowing pipe 1625 and the second air blowing pipe 1626.

[0042] In a preferred embodiment of the present invention, the first damper plate 16298 and the second damper plate 16299, the first silicone pad 162910, the second silicone pad 162911, the first conversion pressure plate 162912, and the second conversion pressure plate 162913 are all provided with a plurality of ventilation holes. Each ventilation hole in the first damper plate 16298, the first silicone pad 162910, and the first conversion pressure plate 162912 corresponds to a single ventilation hole, and each ventilation hole in the second damper plate 16299, the second silicone pad 162911, and the second conversion pressure plate 162913 also corresponds to a single ventilation hole. In actual use, the number of ventilation holes can be determined according to the actual situation.

[0043] In a preferred embodiment of the present invention, the upper end of the air inlet plate 16210 is provided with two clearance grooves for installing the first damper shaft 16296 and the second damper shaft 16297. In actual use, the length of the air inlet plate 16210 is greater than the length of the first damper plate 16298 and the second damper plate 16299, and will not interfere with the overlap or separation of the ventilation holes on the first damper plate 16298 and the second damper plate 16299 with the ventilation holes on the first silicone pad 162910 and the second silicone pad 162911.

[0044] In a preferred embodiment of the present invention, the shock-absorbing assembly 17 includes a first spring top block 171, a shock-absorbing spring 172, and a second spring top block 173. The bottom of the first spring top block 171 is mounted to both ends of the central shaft of the second driven roller 143. A spring shaft is provided on the top of the first spring top block 171, and the shock-absorbing spring 172 is sleeved on the spring shaft. The top of the shock-absorbing spring 172 is connected to the second spring top block 173. In this embodiment, an elastic sleeve is sleeved on the outside of the shock-absorbing spring 172 to protect the shock-absorbing spring 172. In actual use, there is a gap between the spring shaft of the first spring top block 171 and the second spring top block 173, which facilitates the shock-absorbing assembly 17 to play a shock-absorbing role for the transmission assembly 14.

[0045] In a preferred embodiment of the present invention, the first-stage heat recovery device 2 includes a first air-to-air exchanger 21, a connecting channel 22, a second air-to-air exchanger 23, and a blower 24. The first air-to-air exchanger 21, the connecting channel 22, and the second air-to-air exchanger 23 are all installed inside the recovery housing 8. The first air-to-air exchanger 21 is located on the right side of the automatic dust removal system 1. The right side of the first air-to-air exchanger 21 is connected to the second air-to-air exchanger 23 via the connecting channel 22. The first air-to-air exchanger 21 and the second air-to-air exchanger 23 are symmetrically arranged. One side of the second air-to-air exchanger 23 is connected to the blower 24, and the blower 24 is installed outside the recovery housing 8. In actual use, the blower 24 is existing technology and can be a mirror-type AF-YF-4AL-00. Under the action of the blower 24, external airflow (air) circulates between the first air-to-air exchanger 21, the connecting channel 22, and the second air-to-air exchanger 23.

[0046] In a preferred embodiment of the present invention, the first-stage heat recovery device 2 further includes a uniform air distribution frame 25. The uniform air distribution frame 25 is installed between the connecting channel 22 and the second gas exchanger 23. The uniform air distribution frame 25 has a multi-grid structure, with a uniform air distribution mesh installed in each grid. A clearance groove is provided on the side of the uniform air distribution frame 25 near the connecting channel 22, and the connecting channel 22 is installed in the clearance groove. Bolt holes are provided around the uniform air distribution frame 25 for mounting it to the inner wall of the recovery housing 8. The purpose of the uniform air distribution frame 25 is to ensure that the treated waste gas is evenly distributed under the action of the uniform distribution guide plate before entering the next stage, effectively improving the waste gas treatment efficiency.

[0047] In a preferred embodiment of the present invention, the first gas-to-gas exchanger 21 includes a first gas-to-gas exchange body 211, an air inlet channel 213, and an air outlet flange 212. The first gas-to-gas exchange body 211 has an air inlet channel 213 on one side, which is installed to one end of a connecting channel 22. The other side of the first gas-to-gas exchange body 211 is connected to one end of the air outlet flange 212, and the other end of the air outlet flange 212 is installed to the outside of the recovery housing 8. In this embodiment, the first gas-to-gas exchange body 211 includes an exchange chamber and several matrix-arranged heat exchange tubes inside. The heat exchange tubes are used for the flow of high-temperature waste gas, and gaps exist between the heat exchange tubes. This allows airflow to flow between the heat exchange tube gaps to facilitate heat exchange with the high-temperature waste gas inside the heat exchange tubes. In actual use, operators can add baffles inside the first gas-to-gas exchange body 211 so that the airflow entering from the air inlet channel 213 flows through the entire first gas-to-gas exchange body 211.

[0048] In a preferred embodiment of the present invention, the second air-to-air exchanger 23 includes a second air-to-air exchange body 231, an air outlet channel 233, and an air inlet flange 232. The air outlet channel 233 is located on the side of the second air-to-air exchange body 231 closest to the first air-to-air exchange body 211 and is connected to the other end of the connecting channel 22. One side of the second air-to-air exchange body 231 is connected to a blower 24 via a blower flange, and the other side of the second air-to-air exchange body 231 is connected to one end of the air inlet flange 232. The other end of the air inlet flange 232 is installed outside the recovery housing 8. In this embodiment, the structure of the second air-to-air exchange body 231 is the same as that of the first air-to-air exchange body 211. In actual use, a partition can be added inside the second air-to-air exchange body 231 so that the airflow from the air inlet flange 232 flows through the entire second air-to-air exchange body 231 before entering the air outlet channel 233.

[0049] In a preferred embodiment of the present invention, heat insulation plates are installed on the surfaces of both the outlet flange 212 and the inlet flange 232. The heat insulation plates are used to insulate the outlet flange 212 and the inlet flange 232.

[0050] In a preferred embodiment of the present invention, the first-stage heat recovery device 2 further includes a heating structure installed on top of the second gas-to-gas exchanger 23. The heating structure is signal-connected to a controller and is used to reheat the cooling water (60°C hot water) after passing through the second gas-to-gas exchanger 23, allowing the recovered hot water to be used in production. The heating structure is existing technology and can be a conventional heating element. When the heating element reheats the cooling water (60°C hot water) after passing through the second gas-to-gas exchanger 23, this is done to avoid affecting the heat exchange operation between the second gas-to-gas exchanger 23 and the high-temperature waste gas.

[0051] The working process of the first-stage heat recovery device 2: The flow path of high-temperature exhaust gas: The high-temperature exhaust gas first passes through the heat exchange tube of the first gas-gas exchange body 211. After exiting the heat exchange tube of the first gas-gas exchange body 211, it enters the heat exchange tube of the second gas-gas exchange body 231 through the air distribution mesh frame 25. After exiting the heat exchange tube of the second gas-gas exchange body 231, it enters the next stage. The flow path of external airflow: Under the action of blower 24, external air first enters the cavity of the second air-to-air exchange body 231 through the air inlet flange 232, and exchanges heat with the high-temperature waste gas in the heat exchange tube of the second air-to-air exchange body 231. Then, it enters the cavity of the first air-to-air exchange body 211 through the air outlet channel 233, the connecting channel 22, and the air inlet channel 213 in sequence, and exchanges heat with the high-temperature waste gas in the heat exchange tube of the first air-to-air exchange body 211. The heat exchange with the second air-to-air exchanger 23 is completed. The air after heat exchange is warm and can be used for other equipment or site supply.

[0052] In a preferred embodiment of the present invention, the spray system 9 includes a connecting main pipe 91, a plurality of spray branch pipes 92, and a plurality of spray components 93. The connecting main pipe 91 is installed on the side of the recovery housing 8 near the second-stage heat recovery device 3. One end of the connecting main pipe 91 is connected to the pipeline of the circulating water treatment device 6, and the other end of the connecting main pipe 91 is axially and uniformly connected to a plurality of spray branch pipes 92. Each spray branch pipe 92 is installed inside the recovery housing 8, and each spray branch pipe 92 is axially and uniformly connected to a spray component 93. In actual use, the connecting main pipe 91 is connected to the pipeline of the circulating water treatment device 6 through a sealing flange. This spray system 9 can not only serve as a cleaning component to clean the second-stage heat recovery device 3 (its spray liquid can be the cooling water connected to the circulating water treatment device), but also assist the second-stage heat recovery device 3 in heat exchange treatment of waste gas (its spray liquid can be an alkaline solution for desulfurization, so as to facilitate desulfurization of waste gas), thus saving energy consumption.

[0053] In a preferred embodiment of the present invention, the number of spray branch pipes 92 is not less than four. In this embodiment, the number of spray branch pipes 92 is four, but in actual use, the number can be determined according to the actual situation.

[0054] In a preferred embodiment of the present invention, each spray branch pipe 92 has no fewer than five spray components 93. In this embodiment, the number of spray components 93 is five; in actual use, the number can be determined according to the actual situation.

[0055] In a preferred embodiment of the present invention, the spray assembly 93 includes a spray connector 931 and a spray nozzle 932. One end of the spray connector 931 is connected to a spray branch pipe 92, and the other end of the spray connector 931 is connected to the spray nozzle 932. The spray nozzle 932 has a spiral structure. The spiral spray nozzle 932 can spray water more evenly, which is convenient for cooling high-temperature exhaust gas.

[0056] In a preferred embodiment of the present invention, the second-stage heat recovery device 3 includes a radiator module, a heating water tank 35, and a demister 36. The radiator module is disposed inside the recovery housing 8. A spray system 9 and a demister 36 are respectively disposed inside the radiator module. The heating water tank 35 is located on one side of the radiator module and is installed on the outside of the recovery housing 8. The radiator module is used for secondary heat recovery of high-temperature exhaust gas. The heating water tank 35 assists the radiator module, maintaining a stable water supply to the radiator module, and can also heat the cooled water after heat exchange for subsequent production use. The demister 36 is used to remove mist from the exhaust gas containing water vapor.

[0057] In a preferred embodiment of the present invention, the radiator module includes a first radiator 31, a second radiator 32, a third radiator 33, and a fourth radiator 34. The first radiator 31, the second radiator 32, the third radiator 33, the demister 36, and the fourth radiator 34 are arranged sequentially from left to right inside the recycling housing 8. The first radiator 31 and the fourth radiator 34 are connected by pipes, and the second radiator 32 and the third radiator 33 are also connected by pipes. A small heating water tank 35 is provided on one side of the fourth radiator 34. The first radiator 31 and the fourth radiator 34 are both connected to the small heating water tank 35 by pipes, and the second radiator 32 and the third radiator 33 are both connected to the circulating water treatment device 6 by pipes. The spray system 9 is installed between the second radiator 32 and the third radiator 33. In this embodiment, the heat energy of the exhaust gas can be recovered with maximum efficiency through the water flow in the first radiator 31, the second radiator 32, the third radiator 33 and the fourth radiator 34. In actual use, the radiator module can have multiple radiators, not limited to four, and the size can also be determined according to the actual situation.

[0058] Specifically, the heat exchange path of the first radiator 31 and the fourth radiator 34 is as follows: the heating tank 35 supplies water to the fourth radiator 34, the cooling water in the fourth radiator 34 exchanges heat with the exhaust gas, and then circulates back into the first radiator 31 for heat exchange again. The water after heat exchange returns to the heating tank 35. After the heat exchange is completed by the second-stage heat recovery device 3, the heating tank 35 reheats the water after heat exchange in the tank so that the recovered hot water can be used in production. The heat exchange paths of the second radiator 32 and the third radiator 33 are as follows: the water inlet of the third radiator 33 is the water outlet of the circulating water treatment device 6. Under the action of the external water pump, the water flows into the third radiator 33 to exchange heat with the exhaust gas, and then enters the second radiator 32 to exchange heat with the exhaust gas. After that, it returns to the circulating water treatment device 6 from the water outlet of the second radiator 32.

[0059] In a preferred embodiment of the present invention, the second-stage heat recovery device 3 further includes a heating structure, which is installed on one side of the top of the first radiator 31. The heating structure is signal-connected to a controller. The heating structure is used to heat the cooling water (60°C hot water) after passing through the first radiator 31, so that the recovered hot water can be used in production. The heating structure is prior art and can be an existing heating element. When the heating element heats the cooling water (60°C hot water) after passing through the first radiator 31, this is done to avoid affecting the heat exchange operation between the first radiator 31 and the high-temperature exhaust gas.

[0060] In a preferred embodiment of the present invention, the first radiator 31 includes a first heat dissipation frame 311, a first inlet pipe 312, a first outlet pipe 313, four first circulation chambers 314, a plurality of first partitions 315, three first circulation pipes 316, four second circulation chambers 317, a plurality of second partitions 318, and a plurality of first heat dissipation pipes 3110. The first heat dissipation frame 311 is installed inside the recovery housing 8. Four layers of first heat dissipation pipes 3110 are equidistantly installed inside the first heat dissipation frame 311. The four layers of first heat dissipation pipes 3110 are arranged in a matrix (staggered arrangement to facilitate liquid flow between upper and lower layers). Each layer of first heat dissipation pipe 3110... The first circulation pipe 316 has two ends connected to a first circulation chamber 314 and a second circulation chamber 317, respectively. A first water inlet pipe 312 is installed on the first circulation chamber 314 of the top first heat dissipation pipe 3110, and a first water outlet pipe 313 is installed on the first circulation chamber 314 of the bottom first heat dissipation pipe 3110. Each first circulation pipe 316 has two ends connected to two adjacent first circulation chambers 314, and the three first circulation pipes 316 are arranged in parallel. Two first partitions 315 are installed on the inner side of each first circulation chamber 314, and the two first partitions 315 are arranged in parallel. A second partition 318 is installed in the middle of the inner side of each second circulation chamber 317. In this embodiment, the first radiator 31 is a large-size radiator. By setting the first radiator 31, it is easy for water to flow in the first radiator 31, which can improve the heat energy recovery efficiency of the exhaust gas.

[0061] In a preferred embodiment of the present invention, two first heat dissipation fixing plates 319 are respectively installed at both ends of the first heat dissipation frame 311, and the first heat dissipation frame 311 is installed to both sides of the inner wall of the recycling machine housing 8 through the first heat dissipation fixing plates 319. The first heat dissipation fixing plates 319 facilitate the installation of the first heat sink 31 to the recycling machine housing 8 by the operator.

[0062] In a preferred embodiment of the present invention, the first radiator 31 is a finned tube radiator. In actual use, the first radiator 31 can be of the form described above or a finned tube radiator, depending on the actual situation.

[0063] In a preferred embodiment of the present invention, the first radiator 31, the second radiator 32, and the third radiator 33 have the same structure.

[0064] In a preferred embodiment of the present invention, the fourth radiator 34 includes a second heat dissipation frame 341, a second inlet pipe 342, a second outlet pipe 343, three third circulation chambers 344, several third partitions 345, two third circulation pipes 346, three fourth circulation chambers 347, several fourth partitions 348, and several second heat dissipation pipes 3410. The second heat dissipation frame 341 is installed inside the recovery housing 8. Three layers of second heat dissipation pipes 3410 are equidistantly installed inside the second heat dissipation frame 341. The three layers of second heat dissipation pipes 3410 are arranged in a matrix (staggered arrangement to facilitate liquid flow between upper and lower layers). Each layer of second heat dissipation pipes 3410 has two... Each end of the second circulation pipe 346 is connected to a third circulation chamber 344 and a fourth circulation chamber 347, respectively. A second inlet pipe 342 is installed on the third circulation chamber 344 of the top-layer second heat dissipation pipe 3410, and a second outlet pipe 343 is installed on the third circulation chamber 344 of the bottom-layer second heat dissipation pipe 3410. Both ends of each third circulation pipe 346 are connected to two adjacent third circulation chambers 344, and the three third circulation pipes 346 are arranged in parallel. Both ends of each fourth circulation pipe 349 are connected to two adjacent fourth circulation chambers 347, and the two third partitions 345 are arranged in parallel. A fourth partition 348 is installed in the middle of the inner side of each fourth circulation chamber 347. In this embodiment, the fourth radiator 34 is a small-sized radiator, and its function is the same as that of the first radiator 31.

[0065] In a preferred embodiment of the present invention, two second heat dissipation fixing plates 349 are respectively installed at both ends of the second heat dissipation frame 341, and the second heat dissipation frame 341 is installed to both sides of the inner wall of the recycling machine housing 8 through the second heat dissipation fixing plates 349. The second heat dissipation fixing plates 349 facilitate the installation of the fourth heat sink 34 to the recycling machine housing 8 by the operator.

[0066] In a preferred embodiment of the present invention, the heating tank 35 includes a tank body 351, a heating centrifugal pump 352, a heating inlet pipe 353, a first heating water supply pipe 354, a second heating water supply pipe 355, an overflow pipe 356, and a return water pipe 357. The tank body 351 is installed on one side of the outside of the recycling machine casing 8. The overflow pipe 356 is installed at the front end of the tank body 351, and the other end of the overflow pipe 356 is connected to the circulating water treatment device 6. The heating inlet pipe 353 is installed on one side of the tank body 351, and the return water pipe 357 is installed on the other side of the tank body 351. One side of the bottom of the tank body 351 is connected to the water intake end of the heating centrifugal pump 352. The outlet pipe of the heating centrifugal pump 352 is connected to the first heating water supply pipe 354. The first heating water supply pipe 354 is connected to the inlet of the fourth radiator 34. The outlet pipe of the fourth radiator 34 is connected to the first inlet pipe 312 of the first radiator 31. The first outlet pipe 313 of the first radiator 31 is connected to the return water pipe 357. One end of the second heating water supply pipe 355 is connected to the circulating water treatment device 6, and the other end is connected to the inlet of the third radiator 33. The outlet pipe of the third radiator 33 is connected to the inlet of the second radiator 32, and the outlet pipe of the second radiator 32 is connected to the circulating water treatment device 6. In this embodiment, the heating tank 35 can maintain a stable water volume, which helps to recover the heat energy of the wastewater. The heating tank 35 can also be equipped with an existing heater to reheat the water after heat exchange for subsequent production.

[0067] In a preferred embodiment of the present invention, the demister 36 includes two demister modules, which are symmetrically arranged between the third radiator 33 and the fourth radiator 34. The defogging module includes a defogging housing 361, several defogging baffles 362, and several sets of defogging components. The defogging housing 361 is installed between the third radiator 33 and the fourth radiator 34. The defogging housing 361 has a cuboid frame structure. Two defogging baffles 362 are installed on each side of the defogging housing 361 away from the fourth radiator 34. Multiple sets of defogging components are installed inside the defogging housing 361. The defogging components are used to defog the high-temperature exhaust gas containing water vapor and can adsorb large water droplets in the high-temperature exhaust gas. The defogging housing 361 is installed inside the recovery housing 8 through the defogging baffles 362.

[0068] In a preferred embodiment of the present invention, the number of defogging components is not less than two. In actual use, the number of defogging components can be determined according to the actual situation.

[0069] In a preferred embodiment of the present invention, adjacent sets of demisting components are arranged in parallel. The purpose of this parallel arrangement is to facilitate the condensation of water vapor in the exhaust gas onto the demisting components to the greatest extent possible.

[0070] In a preferred embodiment of the present invention, the defogging assembly includes a first defogging plate 363 and a second defogging plate 364. The first defogging plate 363 and the second defogging plate 364 are both installed on the inner wall of the defogging housing 361, and the first defogging plate 363 and the second defogging plate 364 are arranged symmetrically and in parallel.

[0071] In a preferred embodiment of the present invention, the first demister plate 363 includes a demister plate body 3631 and a plurality of demister hooks 3632. The demister plate body 3631 is an elongated structure, with both ends of the demister plate body 3631 respectively installed on both sides of the inner wall of the demister housing 361. The demister plate body 3631 is axially and equidistantly provided with a plurality of demister hooks 3632. The first demister plate 363 and the second demister plate 364 have the same structure. The demister hooks 3632 are designed in a hook shape to facilitate the condensation of water vapor into droplets.

[0072] In a preferred embodiment of the present invention, the demister plate body 3631 and the plurality of demister hooks 3632 are integrally formed. The integrally formed structure can enhance the connection strength between the two.

[0073] In a preferred embodiment of the present invention, the electric field purification system 4 includes a first electric field group 41, a second electric field group 42, a third electric field group 43, a fourth electric field group 44, and two sets of electric field equalization nets 45. The first electric field group 41, the second electric field group 42, the third electric field group 43, and the fourth electric field group 44 are arranged sequentially from left to right inside the recovery housing 8. One set of electric field equalization nets 45 is installed on the left side of the first electric field group 41 and on the right side of the fourth electric field group 44, and both sets of electric field equalization nets 45 are installed inside the recovery housing 8. In this embodiment, under the action of the high-pressure static pressure of the electric field purification system 4, most of the oil fume components in the flue gas are filtered out (purification rate > 96%), and then directly exhausted by the exhaust fan 5.

[0074] In a preferred embodiment of the present invention, the first electric field group 41 includes an electric field water-blocking component 411 and a plurality of electric field modules 412. The electric field water-blocking component 411 is installed on the top side of the inner wall of the recycling housing 8. The plurality of electric field modules 412 are installed at equal intervals below the electric field water-blocking component 411. The plurality of electric field modules 412 are all installed inside the recycling housing 8. The electric field modules 412 are signal-connected to a controller. The first electric field group 41, the second electric field group 42, the third electric field group 43, and the fourth electric field group 44 have the same structure. In this embodiment, the number of electric field modules 412 is three, and the electric field modules 412 are based on existing high-voltage electrostatic field technology.

[0075] In a preferred embodiment of the present invention, the first electric field group 41 further includes an electric field bottom frame 413, the bottoms of several electric field modules 412 are all installed on the electric field bottom frame 413, the electric field bottom frame 413 is installed inside the recycling housing 8, the electric field bottom frame 413 is a rectangular frame structure, and several electric field reinforcing ribs are also installed on the bottom of the electric field bottom frame 413 to enhance the stability of the electric field bottom frame 413.

[0076] In a preferred embodiment of the present invention, the electric field water-blocking assembly 411 includes a first electric field water-blocking frame 4111, a first electric field water-blocking plate 4112, a second electric field water-blocking plate 4113, a first electric field water-blocking sealing plate 4114, and a second electric field water-blocking sealing plate 4115. The first electric field water-blocking frame 4111 is installed on the top side of the inner wall of the recycling housing 8, and the first electric field water-blocking frame 4111 is located above a plurality of electric field modules 412. The first electric field water-blocking plate 4112 and the second electric field water-blocking sealing plate 4115 are installed on the top of the first electric field water-blocking frame 4111. An electric field water baffle 4113 is provided. The first electric field water baffle 4112 and the second electric field water baffle 4113 are symmetrically arranged, and the included angle between them is an obtuse angle. A first electric field water baffle 4114 is installed above the first electric field water baffle 4112, and a second electric field water baffle 4115 is installed above the second electric field water baffle 4113. Both the first electric field water baffle 4114 and the second electric field water baffle 4115 are installed to the top side of the inner wall of the recycling housing 8 via flexible metal hoses. In this embodiment, when the electric field purification system 4 needs cleaning, the electric field water baffle assembly 411 can act as a water baffle for the electric field module 412.

[0077] In a preferred embodiment of the present invention, the circulating water treatment device 6 includes a filter structure 61, a treatment box mechanism 62 and an oil skimming mechanism 63. The filter structure 61 is installed at one end of the treatment box mechanism 62, and the oil skimming mechanism 63 is installed inside the other end of the treatment box mechanism 62. The processing tank mechanism 62 includes a processing tank body 621, a first water-separating plate 622, and a filter plate assembly 623. A filter structure 61 is installed at the top of one end of the processing tank body 621. The first water-separating plate 622 is installed inside one end of the processing tank body 621. The filter plate assembly 623 is installed on the left side of the first water-separating plate 622. The filter plate assembly 623 is installed inside the middle section of the processing tank body 621. An oil skimming mechanism 63 is installed inside the other end of the processing tank body 621. In actual use, the processing tank body 621 can not only cooperate with other components to process the circulating water of the waste gas treatment and waste heat staged recovery device, but also store the circulating water of the waste gas treatment and waste heat staged recovery device, serving as a water tank. The filter plate assembly 623 is used for multi-stage filtration of the circulating water of the waste gas treatment and waste heat staged recovery device. Both the processing tank mechanism 62 and the oil skimming mechanism 63 are signal-connected to a controller.

[0078] This circulating water treatment device 6 has a simple structure. The filter structure 61 can perform the first filtration of the circulating water of the waste gas treatment and waste heat recovery device. The treatment box mechanism 62 can perform multiple filtrations of the circulating water of the waste gas treatment and waste heat recovery device. The oil scraping mechanism 63 can scrape the oil from the circulating water of the waste gas treatment and waste heat recovery device, thereby improving the water quality of the circulating water and facilitating the subsequent spraying operation of the waste gas treatment and waste heat recovery device.

[0079] In a preferred embodiment of the present invention, a circulating water cleaning assembly 64 is further included. The circulating water cleaning assembly 64 is installed inside the filter plate assembly 623. The circulating water cleaning assembly 64 includes a cleaning steam pipe 641, a cleaning Y-type angle seat valve 642, and a cleaning pneumatic box 643. One end of the cleaning steam pipe 641 is located at the bottom of the inner side of the processing box 621, and one end of the cleaning steam pipe 641 is a coil structure with several air outlets equidistantly opened in the axial direction. The other end of the cleaning steam pipe 641 passes through the inner wall of the processing box 621 and communicates with one end of the cleaning Y-type angle seat valve 642. The other end of the cleaning Y-type angle seat valve 642 is connected to an external steam source. The cleaning Y-type angle seat valve 642 is communicatively connected to the cleaning pneumatic box 643, and the cleaning pneumatic box 643 is installed on the outside side of the processing box 621. The circulating water cleaning assembly 64 is used to heat and remove contaminants from the treatment tank mechanism 62. The cleaning Y-type angle seat valve 642 and the cleaning pneumatic box 643 are both existing technologies. The cleaning pneumatic box 643 controls the on / off state of the cleaning Y-type angle seat valve 642. In actual use, because the treatment tank mechanism 62 is used to treat and reuse the circulating water from the waste gas treatment and waste heat recovery unit, and because the circulating water from the waste gas treatment and waste heat recovery unit contains oil, the inner wall of the treatment tank 621 will be coated with oil when the treatment tank mechanism 62 processes the circulating water from the waste gas treatment and waste heat recovery unit. If there is oil stains, it is impossible to clean the oil stains with water alone. Therefore, this application uses a circulating water cleaning component 64 to heat the water to achieve the purpose of cleaning the oil stains. In this embodiment, when the treatment box mechanism 62 is too dirty, the staff fills the treatment box 621 with water, and then controls the cleaning Y-type angle seat valve 642 to open through the cleaning pneumatic box 643. The external steam source can then deliver steam into the cleaning steam pipe 641. The cleaning steam pipe 641 uses steam through the air outlet to heat the water in the treatment box 621, which facilitates the cleaning of the treatment box mechanism 62.

[0080] In a preferred embodiment of the present invention, a water replenishment component 65 is further included. The water replenishment component 65 is installed on one side of the circulating water cleaning component 64. The water replenishment component 65 includes a water replenishment pipe 651, a water replenishment pump, and a water replenishment float valve. One end of the water replenishment pipe 651 is connected to an external water tank via the water replenishment pump. The other end of the water replenishment pipe 651 passes through the inner wall of the treatment tank 621 and is equipped with a water replenishment float valve. The water replenishment float valve is connected to a controller. The water replenishment pump is existing technology. In actual use, when the circulating water of the waste gas treatment and waste heat recovery device is insufficient, the operator replenishes water into the treatment tank 621 through the pneumatic water replenishment pump. The water replenishment float valve is used to monitor the water level in the treatment tank 621 in real time.

[0081] In a preferred embodiment of the present invention, the treatment tank mechanism 62 further includes a treatment tank water pump 624, which is installed at the other end of the treatment tank 621. The treatment tank water pump 624 is signal-connected to the controller. The treatment tank water pump 624 is prior art. In actual use, when the waste gas treatment and waste heat segmented recovery device needs water, the treatment tank water pump 624 can extract the circulating water that has been processed by the oil scraping mechanism 63 in the treatment tank 621.

[0082] In a preferred embodiment of the present invention, a water level monitoring component is further included. The water level monitoring component is installed on one side of the water replenishment float valve. The water level monitoring component is a water level monitoring probe. The water level monitoring probe signal is connected to the controller. The water level monitoring probe is existing technology. In actual use, the water level monitoring component is located near the side of the treatment tank pump 624. The water level monitoring probe is used to monitor the water level on the side near the treatment tank pump 624. This is because when the treatment tank pump 624 pumps water, the water level on the side near the treatment tank pump 624 will be lower than the water level on the side of the water replenishment float valve. Therefore, this application also installs a water level monitoring probe on the side near the treatment tank pump 624 to prevent the treatment tank pump 624 from running dry.

[0083] In a preferred embodiment of the present invention, a processing tank temperature probe 66 is further included. The processing tank temperature probe 66 is installed on the opposite side of the water level monitoring component. The processing tank temperature probe 66 is used to monitor the water temperature inside the processing tank 621. The processing tank temperature probe 66 is connected to the controller. The processing tank temperature probe 66 is existing technology. In actual use, because the circulating water of the waste gas treatment and waste heat recovery device retains temperature after treating the waste gas of the stenter, the temperature after filtration through the filter structure 61 and the filter plate assembly 623 will gradually decrease, but it is not room temperature water. Furthermore, the oil scraping mechanism 63 affects the circulating water. The temperature of the scraping water should not be too high, otherwise it will cause oil and water to mix, which is not conducive to the subsequent scraping of oil by the scraping mechanism 63, and will also prevent the subsequent treatment tank water pump 624 from drawing circulating water (because if the temperature of the circulating water is too high, the treatment tank water pump 624 will not be able to cool the waste gas of the stenter when it draws circulating water to spray the waste gas treatment and waste heat recovery device). Therefore, it is necessary to monitor the temperature of the circulating water before the scraping mechanism 63. When the temperature probe 66 of the treatment tank detects that the temperature is too high, the controller can be used to close the valve of the treatment tank water pump 624 and stop the scraping mechanism 63 from working, so as to avoid the next step of operation.

[0084] In a preferred embodiment of the present invention, the processing box 621 is a rectangular hollow structure. Three processing drain pipes 6211 are provided at the bottom of one side of the processing box 621, and a processing oil drain pipe 6212 is also provided at the bottom of one side of the processing box 621. In actual use, each processing drain pipe 6211 is equipped with a solenoid valve to control the opening and closing of the processing drain pipe 6211. The purpose of the processing drain pipe 6211 is to discharge sewage when cleaning the processing box 621. A solenoid valve is also installed on the processing oil drain pipe 6212 to control the opening and closing of the processing oil drain pipe 6212. The purpose of the processing oil drain pipe 6212 is to discharge sewage during cleaning.

[0085] In a preferred embodiment of the present invention, a first one-way baffle plate 625 is hinged to one side of the bottom of the first water-blocking plate 622. The first one-way baffle plate 625 is used to prevent the water level on the left side of the treatment tank 621 from being higher than the water level on the right side.

[0086] In a preferred embodiment of the present invention, the filter plate assembly 623 includes a first filter screen 6231, a second filter screen 6232, and a second water-separating plate 6233. The first filter screen 6231 is installed inside the treatment box 621 and is located to the left of the first water-separating plate 622. The second water-separating plate 6233 and the second filter screen 6232 are installed sequentially to the left of the first filter screen 6231. The first filter screen 6231 is used for secondary filtration of circulating water, and the second filter screen 6232 is used for tertiary filtration of circulating water. A second one-way baffle is hinged to the bottom of the second water-separating plate 6233. The purpose of the second water-separating plate 6233 is to accommodate circulating water with a large inflow.

[0087] In a preferred embodiment of the present invention, the filter plate assembly 623 includes a first filter screen 6231 and a second filter screen 6232. The first filter screen 6231 is installed inside the treatment box 621 and is located on the left side of the first water baffle 622. The second filter screen 6232 is installed on the left side of the first filter screen 6231. The first filter screen 6231 is used for secondary filtration of circulating water, and the second filter screen 6232 is used for tertiary filtration of circulating water. The purpose of this filter plate assembly 623 is to adapt to circulating water with a small inflow rate.

[0088] In a preferred embodiment of the present invention, the filter structure 61 includes a waterproof filter cover 611 and a first filter assembly 612, a second filter assembly 613, and an overflow filter assembly 614 inside it. The bottom of the waterproof filter cover 611 is installed to one side of the top of the processing box 621. The first filter assembly 612 is installed at the upper part of the interior of the waterproof filter cover 611. The second filter assembly 613 is installed below the first filter assembly 612. The overflow filter assembly 614 is installed on one side of the second filter assembly 613. This filter structure 61 has a simple structure. Through the first filter assembly 612, the second filter assembly 613, and the overflow filter assembly 614, the circulating water of the waste gas treatment and waste heat recovery device can be filtered in two stages. The overflow filter assembly 614 can also store debris to prevent debris from overflowing.

[0089] In a preferred embodiment of the present invention, the filter waterproof cover 611 includes a front filter plate 6111, a rear filter plate 6112, a right filter plate 6113, a left filter plate 6114, and a top filter plate 6115. The front filter plate 6111 and the rear filter plate 6112 are both trapezoidal plate structures. The front filter plate 6111 and the rear filter plate 6112 are symmetrically arranged. The left and right ends of the front filter plate 6111 and the rear filter plate 6112 are respectively connected by the left filter plate 6114 and the right filter plate 6113. The tops of the front filter plate 6111 and the rear filter plate 6112 are connected by the top filter plate 6115. In actual use, the front filter plate 6111, the rear filter plate 6112, the right filter plate 6113, the left filter plate 6114, and the top filter plate 6115 form an open cavity structure, which facilitates the staff to check the entry of circulating water in real time.

[0090] In a preferred embodiment of the present invention, a filter water inlet pipe 6116 is respectively provided on the filter front side plate 6111 and the filter rear side plate 6112. The filter water inlet pipe 6116 is used to discharge the circulating water of the waste gas treatment and waste heat segmented recovery device into the filter waterproof cover 611. In actual use, the staff can choose any water inlet pipe to inject circulating water according to the site settings, which further improves the practicality of the device.

[0091] In a preferred embodiment of the present invention, a plurality of filter mounting plates 615 are also included. A filter mounting plate 615 is installed on each of the four sides of the bottom of the filter waterproof cover 611. The filter waterproof cover 611 is installed to the top of the processing box 621 through the filter mounting plates 615. In actual use, bolt holes are provided on the filter mounting plates 615, so that the operator can install the filter waterproof cover 611 to the top of the processing box 621 by passing bolts through the bolt holes of the filter mounting plates 615.

[0092] In a preferred embodiment of the present invention, the first filter assembly 612 includes filter serrations 6121, a filter base plate 6122, and a filter baffle 6123. One side of the filter base plate 6122 is horizontally installed to the inside of the filter waterproof cover 611 via the filter baffle 612, and the other side of the filter base plate 6122 is equipped with filter serrations 6121. In actual use, when circulating water enters the filter waterproof cover 611, it first flows into the first filter assembly 612. The filter base plate 6122 filters out the circulating water, and the filter serrations 6121 can prevent the circulating water from flowing directly out from one side of the first filter assembly 612. The top of the filter serrations 6121 is provided with several grooves at equal intervals. The grooves are designed to hook large debris when the circulating water flows out from the side.

[0093] In a preferred embodiment of the present invention, the second filter assembly 613 is a cuboid filter plate. Mounting holes are provided around the circumference of the second filter assembly 613, which is then installed onto the inner wall of the waterproof filter cover 611 and one side of the overflow filter assembly 614 through these mounting holes. In this embodiment, three mounting holes are provided on each side of the second filter assembly 613, which is used for secondary filtration of the circulating water after passing through the first filter assembly 612.

[0094] In a preferred embodiment of the present invention, the second filter assembly 613 is installed at an angle to the inner side of the filter waterproof cover 611, and the installation angle between the second filter assembly 613 and the filter waterproof cover 611 is an acute angle. The purpose of the inclined arrangement of the second filter assembly 613 is to facilitate the flow of debris particles such as hair filtered by the circulating water into the overflow filter assembly 614.

[0095] In a preferred embodiment of the present invention, the overflow filter assembly 614 is a cuboid groove structure. One side of the overflow filter assembly 614 is installed to one side of the second filter assembly 613, and the other side of the overflow filter assembly 614 is installed to the inner wall of the filter waterproof cover 611. A stabilizing rod is also installed in the middle of the overflow filter assembly 614. Several filter holes are opened on three sides inside the overflow filter assembly 614. The purpose of the cuboid groove structure is to facilitate the filtration of circulating water and prevent the overflow of circulating water, and it can also store most of the impurities in the circulating water.

[0096] In a preferred embodiment of the present invention, the oil scraping mechanism 63 includes a first oil scraping component 631, a second oil scraping component 632, and an overflow component 633. The first oil scraping component 631 is installed on one side of the top of the processing box 621. The second oil scraping component 632 is installed on one side of the first oil scraping component 631. The second oil scraping component 632 is installed on the other side of the top of the processing box 621. The overflow component 633 is installed on one side of the second oil scraping component 632. Both the first oil scraping component 631 and the second oil scraping component 632 are signal-connected to the controller.

[0097] This oil scraping mechanism 63 can perform multi-stage filtration of oil stains on the surface of circulating water. The first oil scraping component 631 can perform the first stage of oil scraping operation on the circulating water, and the second oil scraping component 632 can perform the second stage of oil scraping operation on the circulating water. The overflow component 633 can prevent excessive oil and water in the second oil scraping component 632 and achieve the effect of timely drainage.

[0098] In a preferred embodiment of the present invention, the first oil scraping assembly 631 includes a first oil scraping motor 6311, an oil scraping rod 6312, a first oil scraping plate 6313, and an oil scraping groove plate 6314. The first oil scraping motor 6311 is fixed to one side of the processing box 621. The output shaft of the first oil scraping motor 6311 is connected to one end of the oil scraping rod 6312 via a coupling. The other end of the oil scraping rod 6312 is connected to the second oil scraping assembly 632. The first oil scraping plate 6313 is sleeved in the middle of the oil scraping rod 6312. The bottom of the first oil scraping plate 6313 is provided with an oil scraping groove plate 6314. The oil scraping groove plate 6314 is installed on one side of the inner wall of the processing box 621. One side of the oil scraping groove plate 6314 is connected to the second oil scraping assembly 632. The driver signal of the first oil scraping motor 6311 is connected to the controller. In this embodiment, the first oil scraper motor 6311 is a prior art technology and can be an existing servo motor. The oil scraper trough 6314 is installed on the left side of the first oil scraper 6313. The output shaft of the first oil scraper motor 6311 rotates clockwise, which facilitates scraping the oil on the circulating water in the treatment box 621 into the oil scraper trough 6314.

[0099] In a preferred embodiment of the present invention, the oil scraping groove plate 6314 is an arc-shaped groove structure. The purpose of the arc-shaped groove structure is to allow the scraped oil and water to flow into the second oil scraping component 632.

[0100] In a preferred embodiment of the present invention, the second oil scraping assembly 632 includes a second oil scraping motor 6321, an oil scraping transmission assembly 6322, an oil scraping roller 6323, a second oil scraping blade 6324, an oil discharge oblique pipe 6325, and an oil separator 6326. The oil separator 6326 is installed inside the processing chamber 621, and the oil separator 6326 and the processing chamber 621 form a hollow cavity structure. The second oil scraping motor 6321 is installed on one side of the top of the processing chamber 621, and the output shaft of the second oil scraping motor 6321 is connected to... The oil scraping drive assembly 6322 is located inside the hollow cavity structure. An oil scraping roller 6323 is installed at the bottom of the oil scraping drive assembly 6322. A second oil scraping plate 6324 is installed on one side of the oil scraping roller 6323. One side of the second oil scraping plate 6324 is installed to the inner wall of the processing box 621. An oil discharge oblique pipe 6325 is also provided on one side of the second oil scraping plate 6324. The oil discharge oblique pipe 6325 is sleeved to one side of the processing box 621. The driver signal of the second oil scraping motor 6321 is connected to the controller. In practical use, the second oil scraping motor 6321 is existing technology and can be a servo motor. The output shaft of the second oil scraping motor 6321 rotates to drive the oil scraping transmission assembly 6322. The oil scraping transmission assembly 6322 drives the oil scraping roller 6323 to rotate. The rotation of the oil scraping roller 6323 causes oil to adhere to the oil scraping roller 6323. One side of the oil scraping roller 6323 is in close contact with the second oil scraping plate 6324. The second oil scraping plate 6324 can scrape the oil on the oil scraping roller 6323 and discharge it through the oil discharge inclined pipe 6325. The oil separator 6326 has an L-shaped structure, so that the oil separator 6326 can form a hollow cavity structure with the inner walls on both sides of the treatment box 621. The purpose of setting the oil separator 6326 is to isolate the circulating water in the treatment box 621 from the oil in the hollow cavity structure.

[0101] In a preferred embodiment of the present invention, the oil scraping transmission assembly 6322 includes an oil scraping drive sprocket 63221, an oil scraping transmission chain 63222, and an oil scraping driven sprocket 63223. The central shaft of the oil scraping drive sprocket 63221 is connected to the output shaft of the second oil scraping motor 6321. The oil scraping drive sprocket 63221 engages with one end of the oil scraping transmission chain 63222 for transmission, and the other end of the oil scraping transmission chain 63222 engages with the oil scraping driven sprocket 63223 for transmission. The central shaft of the oil scraping driven sprocket 63223 is connected to the central shaft of the oil scraping roller 6323 for driving the oil scraping roller 6323 to rotate. In actual use, the output shaft of the second oil scraper motor 6321 rotates, driving the oil scraper drive sprocket 63221 to rotate. The rotation of the oil scraper drive sprocket 63221 drives the oil scraper transmission chain 63222 to rotate. The rotation of the oil scraper transmission chain 63222 drives the oil scraper driven sprocket 63223 to rotate. The rotation of the oil scraper driven sprocket 63223 drives the oil scraper roller 6323 to rotate. The rotation of the oil scraper roller 6323 scrapes the oil on it onto the second oil scraper plate 6324.

[0102] In a preferred embodiment of the present invention, the surface of the oil scraper 6323 is sandblasted. The purpose of sandblasting is to facilitate the oil scraper 6323 in adsorbing oil stains.

[0103] In a preferred embodiment of the present invention, the second oil scraper 6324 and the inner wall of the processing box 621 are inclined. The purpose of the two being inclined is twofold: first, to facilitate the scraping off of oil stains on the surface of the oil scraper roller 6323, and second, to facilitate the discharge of the oil stains that have been hung down through the oil drain pipe 6325.

[0104] In a preferred embodiment of the present invention, the overflow assembly 633 includes an overflow cavity 6331, an overflow pipe 6332, and a baffle plate 6333. The overflow cavity 6331 is installed on one side of the oil baffle plate 6326. An overflow port is provided in the oil baffle plate 6326 and is located in the overflow cavity 6331. The overflow port is connected to one end of the overflow pipe 6332. The overflow pipe 6332 is located in the baffle plate 6333. The other end of the overflow pipe 6332 passes through the inner wall of the treatment box 621 and is connected to the external sewage pipe. In this embodiment, the baffle plate 6333 has an obtuse angle structure. One side of the baffle plate 6333 is installed to the oil baffle plate 6326, and the other side is installed to the inner wall of the treatment tank 621. The bottom of the baffle plate 6333 is connected to the bottom of the treatment tank 621. The purpose of the baffle plate 6333 is to protect the overflow pipe 6332 and prevent water from impacting it. In actual use, when there is too much oil in the hollow cavity structure, the oily wastewater can be discharged through the overflow port of the overflow cavity 6331 and then through the overflow pipe 6332.

[0105] In a preferred embodiment of the present invention, the fire protection and cleaning system 7 includes a temperature monitoring module, a fire protection and cleaning control module, and a fire protection and cleaning component. The temperature monitoring module and the fire protection and cleaning control module are both installed outside the recycling housing 8. The temperature monitoring module is used to monitor the temperature of each section of the recycling housing 8. The fire protection and cleaning control module is used to control the on / off state of the cleaning component. The fire protection and cleaning component is installed inside and outside the recycling housing 8. The fire protection and cleaning component is used to clean the recycling housing 8 and its interior. The temperature monitoring module, the fire protection and cleaning control module, and the fire protection and cleaning component are all signal-connected to a controller.

[0106] In a preferred embodiment of the present invention, the temperature monitoring module includes an exhaust gas inlet temperature sensor 71, a fresh air outlet temperature sensor 72, a first hot air exchange temperature sensor 73, a fresh air inlet temperature sensor 74, a second hot air exchange temperature sensor 75, a pretreatment temperature sensor 76, an electric field temperature sensor 77, and an exhaust gas outlet temperature sensor 78. The exhaust gas inlet temperature sensor 71 is installed in front of the automatic dust removal system 1; the fresh air outlet temperature sensor 72 is installed on the outlet flange 212; the first hot air exchange temperature sensor 73 is installed on the side of the second air exchange body 231 near the outlet channel 233; the fresh air inlet temperature sensor 74 is installed on the inlet flange 232; the second hot air exchange temperature sensor 75 is installed on the side of the second air exchange body 231 away from the outlet channel 233; the pretreatment temperature sensor 76 is installed on the top side of the second-stage heat recovery device 3; the electric field temperature sensor 77 is installed on the top side of the electric field purification system 4; and the exhaust gas outlet temperature sensor 78... Installed on one side of the exhaust fan 5, the exhaust gas inlet temperature sensor 71, fresh air outlet temperature sensor 72, first hot air exchange temperature sensor 73, fresh air inlet temperature sensor 74, second hot air exchange temperature sensor 75, pretreatment temperature sensor 76, electric field temperature sensor 77, and exhaust gas outlet temperature sensor 78 are all connected to the controller. The exhaust gas inlet temperature sensor 71 is used to monitor the high-temperature exhaust gas discharged from the stenter. The fresh air outlet temperature sensor 72 is used to monitor the air outlet temperature at the air outlet flange 212. The first hot air exchange temperature sensor 73 and the second hot air exchange temperature sensor 75 are used to monitor the temperature of the high-temperature exhaust gas before and after entering the second air exchange body 231, respectively. The fresh air inlet temperature sensor 74 is used to monitor the air outlet temperature at the air inlet flange 232. The pretreatment temperature sensor 76 is used to monitor the temperature at the second-stage heat recovery device 3. The electric field temperature sensor 77 is used to monitor the temperature at the electric field purification system 4. The exhaust gas outlet temperature sensor 78 is used to monitor the temperature at the high-temperature exhaust gas outlet. The exhaust gas inlet temperature sensor 71, fresh air outlet temperature sensor 72, first hot air exchange temperature sensor 73, fresh air inlet temperature sensor 74, second hot air exchange temperature sensor 75, pretreatment temperature sensor 76, electric field temperature sensor 77, and exhaust gas outlet temperature sensor 78 are all existing technologies, and the model can be PT100.

[0107] In a preferred embodiment of the present invention, the fire protection and cleaning control module includes a filter air blowing valve 79, a filter cleaning valve 710, a steam extinguishing valve 711, a first-stage hot air exchange cleaning valve 712, a second-stage exchange cleaning valve 713, a second-stage exchange cleaning steam valve 714, a spray valve 715, a second-stage exchange cleaning valve 716, a second-stage exchange cleaning steam valve 717, an electric field flushing valve 718, an electric field flushing valve 719, an electric field flushing valve 720, and an electric field flushing valve 721. The filter air blowing valve 79, the filter cleaning valve 710, and the steam extinguishing valve 711 are all installed on the recovery housing 8 near the automatic dust removal system. On one side, the first-stage hot air exchange cleaning valve 712 is installed on the recovery housing 8 near the first-stage heat energy recovery device 2. The second-stage exchange cleaning valve 1 713, the second-stage exchange cleaning steam valve 1 714, the second-stage exchange cleaning valve 2 716, and the second-stage exchange cleaning steam valve 2 717 are all installed on the recovery housing 8 near the second-stage heat energy recovery device 3. The spray valve 715 is installed on the recovery housing 8 near the spray system 9. The electric field flushing valve 1 718, the electric field flushing valve 2 719, the electric field flushing valve 3 720, and the electric field flushing valve 4 721 are sequentially installed on the recovery housing 8 near the electric field purification system 4. The filter air blowing valve 79... The filter cleaning valve 710, steam fire extinguishing valve 711, first-stage hot air exchange cleaning valve 712, second-stage exchange cleaning valve 1 713, second-stage exchange cleaning steam valve 1 714, spray valve 715, second-stage exchange cleaning valve 2 716, second-stage exchange cleaning steam valve 2 717, electric field flushing valve 1 718, electric field flushing valve 2 719, electric field flushing valve 3 720, and electric field flushing valve 4 721 are all signal-connected to the controller. The filter air blowing valve 79 is used to control the air supply and desiccation of the automatic dust removal system 1. The filter cleaning valve 710 is used to control the water supply and desiccation of the automatic dust removal system 1. The steam fire extinguishing valve 711 is used to control the exhaust gas from the recovery casing 8. The steam flow at the air inlet is controlled by the first-stage hot air exchange cleaning valve 712, which controls the cleaning of the first-stage heat recovery device 2; the second-stage exchange cleaning valve 713 and the second-stage exchange cleaning valve 716, which control the cleaning of the second-stage heat recovery device 3; the second-stage exchange cleaning steam valve 714 and the second-stage exchange cleaning steam valve 717, which control the steam flow at the second-stage heat recovery device 3; the spray valve 715, which controls the spray flow of the spray system 9; and the electric field flushing valve 718, the electric field flushing valve 719, the electric field flushing valve 720, and the electric field flushing valve 721, which control the cleaning of the electric field purification system 4.The filter screen air blowing valve 79, filter screen cleaning valve 710, steam fire extinguishing valve 711, first-stage hot air exchange cleaning valve 712, second-stage exchange cleaning valve 1 713, second-stage exchange cleaning steam valve 1 714, spray valve 715, second-stage exchange cleaning valve 2 716, second-stage exchange cleaning steam valve 2 717, electric field flushing valve 1 718, electric field flushing valve 2 719, electric field flushing valve 3 720 and electric field flushing valve 4 721 are all prior art.

[0108] In a preferred embodiment of the present invention, the fire-fighting and cleaning assembly includes a main fire-fighting and cleaning pipe and several branch fire-fighting and cleaning pipes. The inlet end of the main fire-fighting and cleaning pipe is connected to the circulating water treatment device 6. Several branch fire-fighting and cleaning pipes are axially arranged at the outlet end of the main fire-fighting and cleaning pipe. The branch fire-fighting and cleaning pipes are respectively distributed among the automatic dust removal system 1, the first-stage heat recovery device 2, the sprinkler system 9, the second-stage heat recovery device 3, the electric field purification system 4, and the exhaust fan 5. In actual use, each branch fire-fighting and cleaning pipe can be equipped with multiple nozzles, and the main fire-fighting and cleaning pipe and the number of branch fire-fighting and cleaning pipes can be set according to the actual working environment.

[0109] Advantages of this invention: 1. The high-temperature waxy and oily fumes emitted from the stenter are drawn out by the stenter's exhaust fan and enter the first-stage heat exchanger for gas-water heat exchange. The cooling water (60°C hot water) after passing through the second-stage heat exchanger is reheated so that the recovered hot water can be used in production.

[0110] 2. The flue gas discharged after passing through the first-stage heat exchanger enters the spray box to filter out large particles and lint.

[0111] 3. After being filtered by the spray box, the exhaust gas enters the second-stage heat exchanger to heat the cooling water while simultaneously cooling the exhaust gas from the stenter to 60°C before entering the electric field.

[0112] 4. Finally, the flue gas at a temperature of about 60°C enters the high-voltage electrostatic field. Under the action of the high-voltage electrostatic field, most of the oil fume components in the flue gas are filtered out (purification rate >96%), and then directly exhausted by the exhaust fan 5.

[0113] Uses and features of the present invention: 1. The purified exhaust gas from the stenter meets environmental protection standards, improving the factory area and surrounding environment and protecting the physical and mental health of workers.

[0114] 2. Use the gas-water heat exchanger in the purifier to absorb the heat energy in the waste gas and produce hot water. This achieves the recovery and reuse of waste gas heat energy.

[0115] Example 1: The high-temperature oily fumes emitted from the stenter are piped to the automatic dust removal system 1 for isolation and collection of large particles and lint. They then enter the first-stage heat recovery device 2 (air-to-air exchanger) to generate hot air above 120 degrees Celsius, which is then reused in the stenter. Simultaneously, the exhaust gas temperature is reduced to 120 degrees Celsius before entering the second-stage heat recovery device 3 (air-to-water exchanger), where water spraying further reduces the temperature to below 45 degrees Celsius. The exhaust gas then enters the electric field purification system 4. Under the influence of high-voltage electrostatics, electrons released from evenly distributed discharge points on the surface of the negative electrode metal plate rapidly move towards the positive electrode dust collection plate, colliding with and ionizing gas molecules. When the oily fumes pass through the high-voltage electric field, electrons collide with and capture oily fume particles within a very short time, becoming charged. Under the influence of the electric field force, these particles move towards the positive electrode dust collection plate, adsorbing onto its surface and flowing to the bottom of the electric field, thus achieving the separation of oily fume particles. Because the high-voltage electric field has the characteristic of high purification efficiency for fine particulate matter (purification rate ≥98%), most of the oil and smoke particles in the flue gas are filtered out, ensuring that the purified gas is directly drawn out and discharged by the exhaust fan 5.

[0116] Example introduction: 2.2.1 Automatic dust removal system: The flue gas from the stenter enters a diaphragm screen to remove large particles and lint, which are then isolated on an automatic filter screen. Through automated control processes such as blowing and suction, large particles and lint are effectively removed from the filter screen, significantly improving heat recovery and the efficiency of the electric field.

[0117] 2.2.2 First-stage heat recovery: The flue gas entering the equipment first enters a high-efficiency gas-to-gas heat exchanger, where the heat exchange efficiency is 30% higher than that of wound finned tube heat exchange. High-pressure cleaning nozzles are designed inside the heat exchanger to clean the plates regularly, ensuring that the heat exchanger always operates at high efficiency.

[0118] 2.2.3 Second-stage heat recovery: (Gas-water heat recovery with intermediate water spraying process) 1. A single unit can provide 3-6 tons of hot water above 45 degrees Celsius per hour. The water spray effectively filters out large particles and lint from the exhaust gas before it enters the second-stage heat exchanger. This effectively extends the cleaning interval of the second-stage heat exchanger and improves equipment efficiency.

[0119] 2.2.4 Gas-water separator guide plate: After the high-temperature exhaust gas from the stenter enters the equipment, it is treated by a spray box and a heat recovery exchanger. The flue gas temperature drops to 60°C. Due to the dew point of the air, a large amount of moisture containing grease will be generated (leaking out of the flue gas).

[0120] After passing through the gas-water separator guide plate, the air will smoothly pass through the guide plate to the next stage of the equipment. The grease and moisture that overflow from the air will be absorbed onto the guide plate, flow along the guide plate to the bottom of the equipment, enter the drainage pipe, and flow into the water tank for oil-water separation.

[0121] 2.2.5 Air distribution guide vane: After being cooled and dehydrated, the exhaust gas is evenly distributed by the guide vanes before entering a high-efficiency, high-frequency electric field, maximizing the electric field adsorption area. This effectively improves the efficiency of the electric field in purifying oil fumes.

[0122] 2.2.6 Wide-spacing high-frequency plate electric field: Wide-spacing high-frequency plate electric field utilizes an electric field structure (a plum blossom cathode plate electric field structure). This structure, a point-point discharge, offers advantages such as lower corona initiation voltage and higher discharge intensity compared to other methods. Experiments show that under the same operating voltage, the plum blossom plate point discharge exhibits a more uniform corona current distribution and higher discharge intensity, which is beneficial for capturing high concentrations of fine dust particles. The sharp points of the point corona electrode generate a strong ion current, increasing the electric wind (the movement of gas towards the collecting electrode due to the effect of the ion current on gas molecules is called electric wind), thus helping to reduce corona blockage.

[0123] The plate-type plum blossom cathode plate electric field structure with its pointed discharge form enhances the electric airflow near the plate, making it less prone to dust accumulation and resulting in high smoke removal efficiency. The electric field power and intensity can be adjusted and arranged to maximize the effect within the same dust collection area, while meeting different needs. Under the same dust collection area, the oil fume purification efficiency is more than twice that of traditional plate-type electric fields.

[0124] 2.3 Three-Stage Fire Suppression Modes: Multiple temperature sensors are installed on the equipment. Three of these sensors—the air inlet, the electric field inlet, and the electric field outlet—monitor the temperature at these locations in real time while controlling the equipment. The temperature is compared with the system's preset temperature to determine the three-stage fire suppression mode: pre-stage, mid-stage, and rear-stage. The independently designed sprinkler box uses a bottom-spraying method and is connected between the primary and secondary heat recovery systems, effectively isolating the flames from the front stage from entering the mid- and rear stages. This maximizes the safe operation of the equipment.

[0125] Example 2 The purpose of this embodiment is to provide an integrated machine, which consists of two devices (a waste gas treatment and waste heat recovery unit) and a sizing machine. The integrated machine operates synchronously, simplifying the start-up process, improving the timeliness of emergency response to equipment failures, and allowing both devices to simultaneously handle emergency responses to equipment malfunctions.

[0126] like Figure 44The diagram illustrates the method for automatic operation of the integrated machine. Specifically, the data acquisition for the stenter operation involves collecting data from sensors in various parts of the integrated machine.

[0127] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste gas treatment and waste heat recovery device, characterized in that: The system includes an automatic dust removal system, a first-stage heat recovery device, a second-stage heat recovery device, an electric field purification system, an exhaust fan, a circulating water treatment device, a fire protection and cleaning system, a recovery housing, and a spray system. The recovery housing is a modular hollow cuboid structure. The automatic dust removal system, the first-stage heat recovery device, the second-stage heat recovery device, the electric field purification system, and the exhaust fan are arranged sequentially from left to right inside the recovery housing. The circulating water treatment device is located on one side of the recovery housing. The fire protection and cleaning system is located above and inside the recovery housing. The spray system is located inside the second-stage heat recovery device. The automatic dust removal system, the first-stage heat recovery device, the second-stage heat recovery device, the electric field purification system, and the exhaust fan are arranged sequentially from left to right inside the recovery housing. The circulating water treatment device is located on one side of the recovery housing. The fire protection and cleaning system is located above and inside the recovery housing. The spray system is located inside the second-stage heat recovery device. The heat recovery device, spray system, second-stage heat recovery device, and electric field purification system are all used to treat the high-temperature exhaust gas from the stenter. The exhaust fan is used to discharge the high-temperature exhaust gas. The circulating water treatment device is used to treat the circulating water of the fire protection and cleaning system and the spray system. The bottom of the recovery housing near the automatic dust removal system has a high-temperature exhaust gas inlet, and the top of the recovery housing near the exhaust fan has a high-temperature exhaust gas outlet. The automatic dust removal system, the first-stage heat recovery device, the second-stage heat recovery device, the electric field purification system, the exhaust fan, the circulating water treatment device, the fire protection and cleaning system, and the spray system are all connected to the controller. The first-stage heat recovery device includes a first gas-to-gas exchanger, a connecting channel, a second gas-to-gas exchanger, and a blower. The first gas-to-gas exchanger, the connecting channel, and the second gas-to-gas exchanger are all installed inside the recovery housing. The first gas-to-gas exchanger is located on the right side of the automatic dust removal system. The right side of the first gas-to-gas exchanger is connected to the second gas-to-gas exchanger through the connecting channel. The first gas-to-gas exchanger and the second gas-to-gas exchanger are symmetrically arranged. One side of the second gas-to-gas exchanger is connected to the blower, and the blower is installed outside the recovery housing. The first air-to-air exchanger includes a first air-to-air exchange body, an air inlet channel, and an air outlet flange. High-temperature exhaust gas first passes through the heat exchange tube of the first air-to-air exchange body, and after exiting the heat exchange tube, it enters the heat exchange tube of the second air-to-air exchange body through the air distribution mesh frame. After exiting the heat exchange tube of the second air-to-air exchange body, it enters the next stage. Under the action of the blower, external air first enters the cavity of the second air-to-air exchange body through the air inlet flange and exchanges heat with the high-temperature exhaust gas in the heat exchange tube of the second air-to-air exchange body. Then, it sequentially enters the cavity of the first air-to-air exchange body through the air outlet channel, the connecting channel, and the air inlet channel, and exchanges heat with the high-temperature exhaust gas in the heat exchange tube of the first air-to-air exchange body. The air after heat exchange is warm and can be used for other equipment or site supply. The first-stage heat recovery device also includes a wind distribution mesh frame, which is installed between the connecting channel and the second air exchanger. The wind distribution mesh frame has a multi-grid structure, with a wind distribution mesh installed in each grid. The wind distribution mesh frame has a clearance groove on the side near the connecting channel, and the connecting channel is installed in the clearance groove. Bolt holes are opened around the wind distribution mesh frame for installing the wind distribution mesh frame to the inner wall of the recovery housing. The surfaces of the air outlet flange and the air inlet flange are both equipped with heat insulation plates. The second-stage heat recovery device includes a radiator module, a small heating water tank, and a demister. The radiator module is housed within the recovery unit casing. Inside the radiator module are a spray system and a demister. A small heating water tank is located on one side of the radiator module and is installed on the outside of the recovery unit casing. The small heating water tank supplies water to the fourth radiator. The cooling water in the fourth radiator exchanges heat with the exhaust gas and then circulates back into the first radiator for further heat exchange. The water then returns to the small heating water tank. After the heat exchange in the second-stage heat recovery device is completed, the small heating water tank reheats the water in the tank, allowing the recovered hot water to be used in production. The inlet of the third radiator is the outlet of the circulating water treatment device. Under the action of an external water pump, water enters the third radiator to exchange heat with the exhaust gas, then enters the second radiator to exchange heat with the exhaust gas, and finally returns to the circulating water treatment device from the outlet of the second radiator. The heating water tank includes a small water tank body, a heating centrifugal pump, a heating inlet pipe, a first heating water supply pipe, a second heating water supply pipe, an overflow pipe, and a return water pipe; The demister includes two demister modules, which are symmetrically arranged between the third and fourth radiators. Each demister module includes a demister housing, several demister baffles, and multiple sets of demister components. The demister housing is installed between the third and fourth radiators. Multiple sets of demister components are installed inside the demister housing, with adjacent sets of demister components arranged in parallel. Each demister component includes a first demister plate and a second demister plate, both of which are installed on the inner wall of the demister housing. The first electric field group includes an electric field water-blocking component and several electric field modules. The electric field water-blocking component is installed on the top side of the inner wall of the recycling machine casing. Several electric field modules are installed at equal intervals below the electric field water-blocking component. All of the electric field modules are installed inside the recycling machine casing. The electric field modules are connected to the controller via signals. The spraying system includes a main connecting pipe, several spraying branch pipes, and several spraying components; The automatic dust removal system includes a dust removal housing, a dust removal motor, a dust removal filter, a transmission assembly, a suction assembly, a dust removal cleaning assembly, and a shock absorption assembly. The dust removal housing is installed inside one end of the recycling machine housing, and the dust removal motor is installed on one side of the recycling machine housing. The output shaft of the dust removal motor passes through the side wall of the recycling machine housing and is connected to the upper side of the transmission assembly via a coupling. The dust removal filter is wrapped around the outside of the transmission assembly, and the transmission assembly is used to drive the dust removal filter to rotate. The suction assembly is installed on the bottom side of the transmission assembly, and the dust removal cleaning assembly is installed in the middle of the bottom of the transmission assembly. A shock absorption assembly is installed at each of the two ends of the bottom of the transmission assembly. The dust removal motor, the suction assembly, and the dust removal cleaning assembly are all connected to the controller. The circulating water treatment device includes a filter structure, a treatment box mechanism, and an oil skimming mechanism. The filter structure is installed at one end of the treatment box mechanism, and the oil skimming mechanism is installed inside the other end of the treatment box mechanism. The radiator module includes a first radiator, a second radiator, a third radiator, and a fourth radiator. The first radiator, the second radiator, the third radiator, the demister, and the fourth radiator are arranged sequentially from left to right inside the recycling machine housing. The first radiator and the fourth radiator are connected by pipes, and the second radiator and the third radiator are also connected by pipes. A small heating water tank is provided on one side of the fourth radiator. The first radiator and the fourth radiator are both connected by pipes to the small heating water tank, and the second radiator and the third radiator are both connected by pipes to the circulating water treatment device. The filter structure includes a waterproof filter cover and its internal first filter component, second filter component, and overflow filter component; The first filter assembly includes filter serrations, a filter base plate, and a filter baffle. One side of the filter base plate is horizontally installed to the inside of the filter waterproof cover via the filter baffle. Filter serrations are installed on the other side of the filter base plate. Several grooves are evenly spaced on the top of the filter serrations. The grooves are designed to hook large debris when the circulating water flows out from the side. The second filter assembly is installed at an angle to the inside of the waterproof filter cover, and the installation angle between the second filter assembly and the waterproof filter cover is an acute angle. The overflow filter assembly has a cuboid groove structure. One side of the overflow filter assembly is installed to one side of the second filter assembly, and the other side of the overflow filter assembly is installed to the inner wall of the waterproof filter cover. The oil scraping mechanism includes a first oil scraping component, a second oil scraping component, and an overflow component. The first oil scraping component is installed on one side of the top of the processing box. The second oil scraping component is installed on one side of the first oil scraping component. The second oil scraping component is installed on the other side of the top of the processing box. An overflow component is installed on one side of the second oil scraping component. Both the first oil scraping component and the second oil scraping component are signal-connected to the controller.

2. The waste gas treatment and waste heat staged recovery device according to claim 1, characterized in that: The spraying system includes a main connecting pipe, several spraying branch pipes, and several spraying components. The main connecting pipe is installed on one side of the recycling machine casing. One end of the main connecting pipe is connected to the pipeline of the circulating water treatment device. The other end of the main connecting pipe is axially and evenly connected to several spraying branch pipes. Each spraying branch pipe is installed inside the recycling machine casing, and each spraying branch pipe is axially and evenly connected to a spraying component.

3. The waste gas treatment and waste heat staged recovery device according to claim 1, characterized in that: The electric field purification system includes a first electric field group, a second electric field group, a third electric field group, a fourth electric field group, and two sets of electric field equalization networks. The first electric field group, the second electric field group, the third electric field group, and the fourth electric field group are arranged sequentially from left to right inside the recycling housing. One set of electric field equalization networks is installed on the left side of the first electric field group and the right side of the fourth electric field group. Both sets of electric field equalization networks are installed inside the recycling housing.

4. The waste gas treatment and waste heat staged recovery device according to claim 1, characterized in that: The fire protection and cleaning system includes a temperature monitoring module, a fire protection and cleaning control module, and fire protection and cleaning components. The temperature monitoring module and the fire protection and cleaning control module are both installed outside the recycling machine housing. The temperature monitoring module is used to monitor the temperature of each section of the recycling machine housing. The fire protection and cleaning control module is used to control the on / off state of the cleaning components. The fire protection and cleaning components are installed inside and outside the recycling machine housing and are used to clean the recycling machine housing and its interior. The temperature monitoring module, the fire protection and cleaning control module, and the fire protection and cleaning components are all connected to the controller.

5. A stenter, employing the waste gas treatment and waste heat staged recovery device according to any one of claims 1-4, characterized in that: It includes a stenter, and the waste gas treatment and waste heat recovery device is located above the stenter.

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