Self-deashing waste heat boiler capable of recovering flue gas heat

Abstract

The invention discloses a self-deashing waste heat boiler capable of recovering flue gas heat, and relates to the technical field of waste heat boilers, the waste heat boiler performs three-stage heat exchange on flue gas through a heat exchange pipe of a flue gas heat exchange mechanism, so that flue gas waste heat is recovered, an included angle between the heat exchange pipe and flue gas flow is automatically adjusted through an adjusting mechanism along with the change of the flue gas flow rate, and the flue gas flow rate is adjusted. The stability of the heat exchange pipe in high-speed airflow is ensured, efficient heat exchange is kept in low-speed airflow, the ash is preliminarily separated through a spiral blade arranged at an inlet, the surface of the heat exchange pipe is self-cleaned through an ash cleaning mechanism with smoke as a power source, and the influence of accumulated ash on the heat exchange efficiency is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat boilers, in particular to a self-cleaning waste heat boiler with flue gas heat recovery. Background Art

[0002] In traditional waste heat boilers, the waste heat boiler and the flue gas conveying pipes are directly connected. The dust particles in the flue gas directly enter the heat exchange area, which easily forms a dust layer on the surface of the heat exchange tube. As the heat exchange efficiency increases with the operation time of the waste heat boiler, the dust layer thickens, which leads to a significant decrease in heat exchange efficiency. Therefore, frequent shutdowns for dust cleaning are required, affecting work efficiency.

[0003] Moreover, in existing and traditional waste heat boilers, the heat exchange tubes in the waste heat boiler are mostly arranged in a fixed manner, and the angle between the heat exchange tubes and the flue gas flow cannot be adjusted in real time according to the flow rate of the flue gas. As a result, the staggered heat exchange tubes are prone to vibration due to excessive wind speed, which reduces the stability. When the wind speed of the heat exchange tubes arranged in sequence is slow, the flue gas cannot fully flush the tube wall, resulting in insufficient heat exchange efficiency. Summary of the Invention

[0004] The object of the present invention is to provide a self-cleaning waste heat boiler with flue gas heat recovery to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions: A self-cleaning waste heat boiler with flue gas heat recovery, the waste heat boiler includes a shell, a separation mechanism, a flue gas heat exchange mechanism, a regulating mechanism and a cleaning mechanism, the shell and the separation mechanism are fixedly connected, the flue gas heat exchange mechanism and the shell are fixedly connected, the regulating mechanism and the shell are fixedly connected, the flue gas heat exchange mechanism and the regulating mechanism are fixedly connected, and the cleaning mechanism and the flue gas heat exchange mechanism are fixedly connected.

[0006] The dust particles in the flue gas are initially separated by a separation mechanism fixed on the flue gas inlet of the outer shell, and the flue gas is subjected to three-stage heat exchange by a flue gas heat exchange mechanism fixed on the outer shell. The angle between the flue gas heat exchange mechanism and the flue gas flow is adjusted by an adjusting mechanism according to the flue gas flow rate, thereby changing the heat exchange area. The kinetic energy of the flue gas drives the cleaning mechanism to automatically scrape the surface of the heat absorption tube, thereby maintaining stable heat exchange efficiency and reducing the need for manual maintenance, thereby achieving a self-cleaning effect.

[0007] Furthermore, the adjustment mechanism includes a No. 1 drive unit, a No. 1 connecting rod, a universal joint, a connecting plate and a rotating unit. The No. 1 drive unit is slidably connected to the outer shell. Two universal joints are provided. The No. 1 drive unit and one universal joint are fixedly connected. Both ends of the No. 1 connecting rod are respectively fixedly connected to the two universal joints. The other universal joint is fixedly connected to the flue gas heat exchange mechanism. The connecting plate is fixedly connected to the flue gas heat exchange mechanism. The rotating unit is fixedly connected to the flue gas heat exchange mechanism.

[0008] Through the No. 1 drive unit arranged at the flue gas inlet, when the flue gas flow rate becomes faster, the flue gas pushes the No. 1 drive unit to rotate, thereby rotating the two No. 1 connecting rods connected to the No. 1 drive unit through the universal joint. The No. 1 connecting rod is connected to the flue gas heat exchange mechanism through the universal joint, so that the two No. 1 connecting rods pull the flue gas heat exchange mechanism to rotate along the axis of the rotating unit. Through the connecting plate, the heat absorption tubes of the flue gas heat exchange mechanism are rotated along the axis of the rotating unit respectively, thereby adjusting the angle of the flue gas heat exchange mechanism.

[0009] Furthermore, the No. 1 drive unit includes an annular spring, a rotating ring, a No. 1 slider and a guide plate. The outer shell is provided with an annular groove, the annular spring is placed in the annular groove, the annular spring and the No. 1 slider are fixedly connected, the rotating ring and the outer shell are slidably connected, and there are several guide plates, and several guide plates are fixedly connected to the rotating ring.

[0010] Through several guide plates fixed on the rotating ring, the flue gas pushes the guide plates, thereby causing the rotating ring to rotate, thereby driving the No. 1 slider fixed on it to slide along the annular groove, compressing the annular spring. When the flue gas flow rate decreases, the thrust exerted on the guide plate cannot overcome the elastic force of the annular spring, and the annular spring resets, causing the rotating ring to rotate in the opposite direction, thereby resetting the flue gas heat exchange mechanism.

[0011] Furthermore, the rotating unit includes a mounting seat, a No. 1 sealing ring, a bearing and a No. 2 sealing ring. The mounting seat is fixedly connected to the outer shell, the No. 1 sealing ring is fixedly connected to the mounting seat, the outer ring of the bearing is fixedly connected to the mounting seat, the inner ring of the bearing is fixedly connected to the flue gas heat exchange mechanism, and the No. 2 sealing ring is fixedly connected to the mounting seat.

[0012] The mounting seat is fixed to the outer shell by welding, providing installation space for the bearing and the sealing ring. The outer ring of the bearing and the mounting seat are fixedly connected, and the inner ring of the bearing and the flue gas heat exchange mechanism are fixedly connected, so that the heat absorption tube of the flue gas heat exchange mechanism can rotate. The No. 1 sealing ring is installed on the side close to the flue gas to prevent the leakage of high-temperature flue gas. The two No. 2 sealing rings are respectively installed on both sides of the heat absorption tube and its connecting pipe to prevent the leakage of heat exchange water or steam.

[0013] Furthermore, the cleaning mechanism includes a No. 2 drive unit, a transmission unit, a mobile unit, a scraper, a No. 2 connecting rod and a No. 2 slider. The No. 2 drive unit is fixedly connected to the outer shell, the No. 2 drive unit and the transmission unit are fixedly connected, the transmission unit and the mobile unit are fixedly connected, the scraper and the mobile unit are fixedly connected, the No. 2 connecting rod is fixedly connected to the connecting plate, the No. 2 slider and the No. 2 connecting rod are slidably connected, and the No. 2 slider and the scraper are fixedly connected.

[0014] The flue gas drives the No. 2 drive unit to generate power through the No. 2 drive unit arranged at the flue gas outlet, and the power is transmitted to the mobile unit through the transmission unit. The scraper and the mobile unit are fixedly connected, so that the scraper moves up and down with the mobile unit, thereby scraping off the soot of the flue gas heat exchange mechanism. The No. 2 slider fixed on the No. 2 connecting rod is fixed to the scraper through the No. 2 connecting rod, so that the scraper rotates synchronously with the heat absorption tube of the flue gas heat exchange mechanism.

[0015] Furthermore, the second drive unit includes a fixed rod, a mounting shell, fan blades and a rotating shaft, the fixed rod and the outer shell are fixedly connected, the fixed rod and the mounting shell are fixedly connected, the rotating shaft and the mounting shell are rotatably connected, and the fan blades and the rotating shaft are fixedly connected.

[0016] The mounting shell is fixed by a fixing rod. When the flue gas flows toward the outlet, the flue gas flows through the fan blades, and the flue gas pushes the fan blades to rotate continuously, thereby driving the rotating shaft fixed to the fan blades to rotate in the mounting shell, and the mounting shell prevents the flue gas and dust from invading the transmission unit connected thereto.

[0017] Furthermore, the transmission unit includes a No. 1 bevel gear, a No. 2 bevel gear, a transmission shaft, a No. 1 gear, a No. 2 gear, a reciprocating screw and a slider nut. The No. 1 bevel gear is fixedly connected to the rotating shaft, the No. 2 bevel gear is meshed with the No. 1 bevel gear, the transmission shaft is fixedly connected to the No. 2 bevel gear, the transmission shaft is rotatably connected to the outer shell, the No. 1 gear is fixedly connected to the transmission shaft, the No. 1 gear is meshed with the No. 2 gear, the reciprocating screw and the No. 2 gear are fixedly connected, the reciprocating screw and the outer shell are rotatably connected, and the slider nut and the reciprocating screw are slidably connected.

[0018] The No. 1 bevel gear fixed on the rotating shaft rotates with the rotating shaft, and the No. 2 bevel gear is engaged with the No. 1 bevel gear, so that the No. 1 bevel gear drives the No. 2 bevel gear to rotate. The transmission shaft and the No. 2 bevel gear are fixed, so that the transmission shaft rotates, thereby driving the No. 1 gear fixed on the transmission shaft to rotate. The No. 1 gear is engaged with the No. 2 gear, so that the No. 1 gear drives the No. 2 gear to rotate, and the reciprocating screw fixed on the No. 2 gear rotates, so that the slider nut moves up and down with the rotation of the reciprocating screw.

[0019] Furthermore, the mobile unit includes a No. 3 connecting rod, a No. 1 slide rod, a guide rail, a No. 3 slider and a No. 2 slide rod. The No. 3 connecting rod and the slider nut are fixedly connected, the No. 1 slide rod and the No. 3 connecting rod are fixedly connected, the guide rail and the No. 1 slide rod are slidably connected, the guide rail and the outer shell are fixedly connected, the No. 3 slider and the No. 1 slide rod are slidably connected, the No. 2 slide rod and the No. 3 slider are hinged, the scraper is provided with a sliding groove, and the No. 2 slide rod is slidably connected to the sliding groove.

[0020] The No. 3 connecting rod and the slider nut are fixed so that the No. 3 connecting rod moves up and down with the slider nut. The No. 1 slider and the No. 3 connecting rod are fixed, and the guide rail and the shell are fixed so that the No. 3 connecting rod slides up and down along the guide rail. The No. 3 slider can only slide horizontally on the No. 1 slider, so that the No. 3 slider is driven to move when the No. 1 slider moves up and down. The No. 2 slider and the No. 3 slider are hinged, and the No. 2 slider is in the sliding groove, thereby driving the scraper to move. When the flue gas heat exchange mechanism rotates, the No. 2 slider rotates along the hinge, and the No. 3 slider slides horizontally on the No. 1 slider, and the No. 2 slider slides in the sliding groove, so that the scraper rotates synchronously.

[0021] Furthermore, the separation mechanism includes a spiral blade, a connecting cylinder and a fixed shaft, the spiral blade is fixedly connected to the connecting cylinder, the fixed shaft is fixedly connected to the spiral blade, and the connecting cylinder is fixedly connected to the shell.

[0022] The connecting tube is fixed to the flue gas inlet of the shell, and the spiral blades fixed in the connecting tube convert the axial flow of the flue gas into a high-speed rotating flow, so that the solid particles in the flue gas are thrown to the inner wall of the connecting tube, thereby separating some of the dust in the flue gas.

[0023] Furthermore, the flue gas heat exchange mechanism includes a bracket, a steam drum and a heat exchange tube. The bracket is fixedly connected to the shell, the steam drum and the bracket are fixedly connected. There are three heat exchange tubes, the three heat exchange tubes are connected to the steam drum pipeline, and the three heat exchange tubes are fixedly connected to the inner ring of the bearing.

[0024] Three heat exchange tubes are provided, and the heat exchange tube near the flue gas outlet is connected to an external water source. The external water source enters the heat exchange tube and absorbs the waste heat of the flue gas to heat up. The water after absorbing the heat passes through the pipe of the mounting seat and fixes the steam drum through the bracket, so that the water in the heat exchange tube flows into the steam drum. The middle heat exchange tube is connected to the bottom of the steam drum, so that the water preliminarily heated in the steam drum flows into the middle heat exchange tube. The water in the middle heat exchange tube and the steam drum is forced to circulate through the water pump, so that the water in the middle heat exchange tube absorbs heat and returns to the steam drum. The steam formed by absorbing heat flows through the pipe on the upper part of the steam drum into the heat exchange tube near the flue gas inlet for further heating, thereby realizing heat recovery of the flue gas.

[0025] Compared with the prior art, the present invention has the following beneficial effects: 1. When the flue gas flow rate increases, the flue gas pushes the guide plate to drive the rotating ring to rotate, causing the No. 1 slider to compress the annular spring, and pull the flue gas heat exchange mechanism through the universal joint and the No. 1 connecting rod to rotate around the bearing axis of the rotating unit, reducing the angle between the heat exchange tube and the flue gas flow, ensuring the stability of the heat exchange tube. When the flue gas flow rate decreases, the annular spring resets, pushing the rotating ring to rotate in the opposite direction, the heat exchange mechanism resets, and the angle increases, thereby maintaining efficient heat exchange under slower wind speeds.

[0026] 2. The separation mechanism installed at the flue gas inlet can preliminarily separate the dust particles in the flue gas before it reaches the heat exchange tube, reducing the soot adhering to the surface of the heat exchange tube, thereby improving the heat exchange efficiency.

[0027] 3. The kinetic energy of the flue gas flow drives the cleaning mechanism to move the scraper up and down, thereby self-cleaning the surface of the heat exchange tube, reducing the impact of dust accumulation on heat exchange efficiency and extending the service life of the equipment.

[0028] 4. The flue gas heat exchange mechanism uses three sets of heat exchange tubes to perform three-stage heat exchange on the flue gas, thereby efficiently recovering the waste heat of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the present invention; Figure 3 yes Figure 2 A magnified view of a part A; Figure 4 yes Figure 2 A magnified view of a part B; Figure 5 This is a schematic structural diagram of the first drive unit of the present invention; Figure 6 yes Figure 2 A magnified view of a local area C; Figure 7 Schematic diagram of the structure of the dust cleaning mechanism of the present invention; Figure 8 yes Figure 2 A partial enlarged view of D; Figure 9 This is a schematic diagram of the connection between the first gear and the second gear of the present invention; Figure 10 It is a structural schematic diagram of the mobile unit of the present invention; Figure 11 yes Figure 10 A magnified view of a local area E.

[0030] In the figure: 1. Housing; 11. Annular groove; 2. Separation mechanism; 21. Spiral blade; 22. Connecting cylinder; 23. Fixed shaft; 3. Flue gas heat exchange mechanism; 31. Bracket; 32. Steam drum; 33. Heat exchange tube; 4. Adjustment mechanism; 41. Drive unit No. 1; 411. Annular spring; 412. Rotating ring; 413. Slider No. 1; 414. Guide plate; 42. Connecting rod No. 1; 43. Universal joint; 44. Connecting plate; 45. Rotating unit; 451. Mounting seat; 452. Sealing ring No. 1; 453. Bearing; 454. Sealing ring No. 2; 5. Cleaning mechanism; 51. Drive unit No. 2; 511. Fixed rod; 512. Mounting shell; 513. Fan blade; 514. Rotating shaft; 52. Transmission unit; 521. Bevel gear No. 1; 522. Bevel gear No. 2; 523. Transmission shaft; 524. Gear No. 1; 525. Gear No. 2; 526. Reciprocating screw; 527. Slider nut; 53. Moving unit; 531. Connecting rod No. 3; 532. Sliding rod No. 1; 533. Guide rail; 534. Sliding rod No. 3; 535. Sliding rod No. 2; 54. Scraper; 541. Sliding groove; 55. Connecting rod No. 2; 56. Sliding rod No. 2. DETAILED DESCRIPTION

[0031] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0032] Example: Figure 1 and Figure 2 As shown, the present invention provides a technical solution for a self-cleaning waste heat boiler with flue gas heat recovery, a self-cleaning waste heat boiler with flue gas heat recovery, the waste heat boiler comprising an outer shell 1, a separation mechanism 2, a flue gas heat exchange mechanism 3, an adjustment mechanism 4 and a cleaning mechanism 5, the outer shell 1 and the separation mechanism 2 are fixedly connected, the flue gas heat exchange mechanism 3 and the outer shell 1 are fixedly connected, the adjustment mechanism 4 and the outer shell 1 are fixedly connected, the flue gas heat exchange mechanism 3 and the adjustment mechanism 4 are fixedly connected, and the cleaning mechanism 5 and the flue gas heat exchange mechanism 3 are fixedly connected.

[0033] The dust particles in the flue gas are preliminarily separated by the separation mechanism 2 fixed on the flue gas inlet of the shell 1, and the flue gas is subjected to three-stage heat exchange by the flue gas heat exchange mechanism 3 fixed on the shell 1. The angle between the flue gas heat exchange mechanism 3 and the flue gas flow is adjusted by the adjustment mechanism 4 according to the flue gas flow rate, thereby changing the heat exchange area. The cleaning mechanism 5 is driven by the kinetic energy of the flue gas to automatically scrape the dust on the surface of the heat absorption tube, thereby maintaining stable heat exchange efficiency and reducing the need for manual maintenance, thereby achieving a self-cleaning effect.

[0034] like Figure 2-Figure 4As shown, the adjustment mechanism 4 includes a No. 1 drive unit 41, a No. 1 connecting rod 42, a universal joint 43, a connecting plate 44 and a rotating unit 45. The No. 1 drive unit 41 is slidably connected to the housing 1. Two universal joints 43 are provided. The No. 1 drive unit 41 and one universal joint 43 are fixedly connected. Both ends of the No. 1 connecting rod 42 are respectively fixedly connected to the two universal joints 43. The other universal joint 43 is fixedly connected to the flue gas heat exchange mechanism 3. The connecting plate 44 is fixedly connected to the flue gas heat exchange mechanism 3. The rotating unit 45 is fixedly connected to the flue gas heat exchange mechanism 3.

[0035] Through the No. 1 drive unit 41 set at the flue gas inlet, when the flue gas flow rate becomes faster, the flue gas pushes the No. 1 drive unit 41 to rotate, thereby rotating the two No. 1 connecting rods 42 connected to the No. 1 drive unit 41 through the universal joint 43. The No. 1 connecting rod 42 is connected to the flue gas heat exchange mechanism 3 through the universal joint 43, so that the two No. 1 connecting rods 42 pull the flue gas heat exchange mechanism 3 to rotate along the axis of the rotating unit 45. Through the connecting plate 44, the heat absorption tubes of the flue gas heat exchange mechanism 3 are rotated respectively along the axis of the rotating unit 45, thereby adjusting the angle of the flue gas heat exchange mechanism 3.

[0036] like Figure 5 As shown, the No. 1 drive unit 41 includes an annular spring 411, a rotating ring 412, a No. 1 slider 413 and a guide plate 414. The outer shell 1 is provided with an annular groove 11, the annular spring 411 is placed in the annular groove 11, the annular spring 411 and the No. 1 slider 413 are fixedly connected, the rotating ring 412 and the outer shell 1 are slidingly connected, and a number of guide plates 414 are provided, and a number of guide plates 414 and the rotating ring 412 are fixedly connected.

[0037] Through a plurality of guide plates 414 fixed on the rotating ring 412, the flue gas pushes the guide plates 414, thereby rotating the rotating ring 412, thereby driving the slider 413 fixed thereon to slide along the annular groove 11, compressing the annular spring 411. When the flue gas flow rate decreases, the thrust exerted on the guide plates 414 cannot overcome the elastic force of the annular spring 411, and the annular spring 411 resets, causing the rotating ring 412 to rotate in the opposite direction, thereby resetting the flue gas heat exchange mechanism 3.

[0038] like Figure 6 As shown, the rotating unit 45 includes a mounting seat 451, a No. 1 sealing ring 452, a bearing 453 and a No. 2 sealing ring 454. The mounting seat 451 is fixedly connected to the outer shell 1, the No. 1 sealing ring 452 is fixedly connected to the mounting seat 451, the outer ring of the bearing 453 is fixedly connected to the mounting seat 451, the inner ring of the bearing 453 is fixedly connected to the flue gas heat exchange mechanism 3, and the No. 2 sealing ring 454 is fixedly connected to the mounting seat 451.

[0039] The mounting seat 451 is fixed to the housing 1 by welding, providing installation space for the bearing 453 and the sealing ring. The outer ring of the bearing 453 is fixedly connected to the mounting seat 451, and the inner ring of the bearing 453 is fixedly connected to the flue gas heat exchange mechanism 3, so that the heat absorption tube of the flue gas heat exchange mechanism 3 can rotate. The No. 1 sealing ring 452 is installed on the side close to the flue gas to prevent the leakage of high-temperature flue gas. The two No. 2 sealing rings 454 are respectively installed on both sides of the heat absorption tube and its connecting pipe to prevent the leakage of heat exchanged water or steam.

[0040] like Figure 2 and Figure 7 As shown, the cleaning mechanism 5 includes a No. 2 drive unit 51, a transmission unit 52, a mobile unit 53, a scraper 54, a No. 2 connecting rod 55 and a No. 2 slider 56. The No. 2 drive unit 51 is fixedly connected to the housing 1, the No. 2 drive unit 51 and the transmission unit 52 are fixedly connected, the transmission unit 52 and the mobile unit 53 are fixedly connected, the scraper 54 and the mobile unit 53 are fixedly connected, the No. 2 connecting rod 55 is fixedly connected to the connecting plate 44, the No. 2 slider 56 and the No. 2 connecting rod 55 are slidably connected, and the No. 2 slider 56 and the scraper 54 are fixedly connected.

[0041] The flue gas drives the No. 2 drive unit 51 to generate power through the transmission unit 52, and the power is transmitted to the moving unit 53 through the scraper 54 and the moving unit 53. The scraper 54 is fixedly connected to the moving unit 53, so that the scraper 54 moves up and down with the moving unit 53, so that the scraper 54 scrapes off the soot of the flue gas heat exchange mechanism 3. The scraper 54 is fixed to the scraper 54 through the No. 2 slider 56 on the No. 2 connecting rod 55 fixed on the connecting plate 44, so that the scraper 54 rotates synchronously with the heat absorption tube of the flue gas heat exchange mechanism 3.

[0042] like Figure 8 As shown, the second drive unit 51 includes a fixed rod 511, a mounting shell 512, fan blades 513 and a rotating shaft 514. The fixed rod 511 is fixedly connected to the outer shell 1, the fixed rod 511 is fixedly connected to the mounting shell 512, the rotating shaft 514 is rotatably connected to the mounting shell 512, and the fan blades 513 are fixedly connected to the rotating shaft 514.

[0043] The mounting shell 512 is fixed by the fixing rod 511. When the smoke flows toward the outlet, the smoke flows through the fan blades 513, and the smoke pushes the fan blades 513 to rotate continuously, thereby driving the rotating shaft 514 fixed to the fan blades 513 to rotate in the mounting shell 512, and the mounting shell 512 prevents smoke dust from invading the transmission unit 52 connected thereto.

[0044] like Figure 8 and Figure 9As shown, the transmission unit 52 includes a number one bevel gear 521, a number two bevel gear 522, a transmission shaft 523, a number one gear 524, a number two gear 525, a reciprocating screw 526 and a slider nut 527. The number one bevel gear 521 is fixedly connected to the rotating shaft 514, the number two bevel gear 522 is meshed with the number one bevel gear 521, the transmission shaft 523 is fixedly connected to the number two bevel gear 522, the transmission shaft 523 is rotationally connected to the housing 1, the number one gear 524 is fixedly connected to the transmission shaft 523, the number one gear 524 is meshed with the number two gear 525, the reciprocating screw 526 is fixedly connected to the number two gear 525, the reciprocating screw 526 is rotationally connected to the housing 1, and the slider nut 527 is slidingly connected to the reciprocating screw 526.

[0045] The first bevel gear 521 is fixed to the rotating shaft 514, so that the first bevel gear 521 rotates with the rotating shaft 514. The second bevel gear 522 is meshed with the first bevel gear 521, so that the first bevel gear 521 drives the second bevel gear 522 to rotate. The transmission shaft 523 is fixed to the second bevel gear 522, so that the transmission shaft 523 rotates, thereby driving the first gear 524 fixed on the transmission shaft 523 to rotate. The first gear 524 is meshed with the second gear 525, so that the first gear 524 drives the second gear 525 to rotate, so that the reciprocating screw 526 fixed to the second gear 525 rotates, and the slider nut 527 moves up and down with the rotation of the reciprocating screw 526.

[0046] like Figure 7 、 Figure 10 and Figure 11 As shown, the mobile unit 53 includes a No. 3 connecting rod 531, a No. 1 slide bar 532, a guide rail 533, a No. 3 slider 534 and a No. 2 slide bar 535. The No. 3 connecting rod 531 is fixedly connected to the slider nut 527, the No. 1 slide bar 532 is fixedly connected to the No. 3 connecting rod 531, the guide rail 533 is slidably connected to the No. 1 slide bar 532, the guide rail 533 is fixedly connected to the housing 1, the No. 3 slider 534 is slidably connected to the No. 1 slide bar 532, the No. 2 slide bar 535 is hinged to the No. 3 slider 534, and the scraper 54 is provided with a sliding groove 541, and the No. 2 slide bar 535 is slidably connected to the sliding groove 541.

[0047] The third connecting rod 531 is fixed with the slider nut 527, so that the third connecting rod 531 moves up and down with the slider nut 527, the first slider 532 and the third connecting rod 531 are fixed, and the guide rail 533 and the shell 1 are fixed, so that the third connecting rod 531 slides up and down along the guide rail 533, and the third slider 534 can only slide horizontally on the first slider 532, so that the third slider 534 is driven to move when the first slider 532 moves up and down, and the second slider 535 and the third slider 534 are hinged, the second slider 535 is in the sliding groove 541, thereby driving the scraper 54 to move. When the flue gas heat exchange mechanism 3 rotates, the second slider 535 rotates along the hinge, and the third slider 534 slides horizontally on the first slider 532, and the second slider 535 slides in the sliding groove 541, so that the scraper 54 rotates synchronously.

[0048] like Figure 2 As shown, the separation mechanism 2 includes a spiral blade 21, a connecting cylinder 22 and a fixed shaft 23. The spiral blade 21 is fixedly connected to the connecting cylinder 22, the fixed shaft 23 is fixedly connected to the spiral blade 21, and the connecting cylinder 22 is fixedly connected to the housing 1.

[0049] The connecting cylinder 22 is fixed to the flue gas inlet of the outer shell 1, and the spiral blades 21 fixed in the connecting cylinder 22 convert the axial flow of the flue gas into a high-speed rotating flow, so that the solid particles in the flue gas are thrown to the inner wall of the connecting cylinder 22, thereby separating some of the dust in the flue gas.

[0050] like Figure 1 and Figure 2 As shown, the flue gas heat exchange mechanism 3 includes a bracket 31, a steam drum 32 and a heat exchange tube 33. The bracket 31 is fixedly connected to the shell 1, the steam drum 32 is fixedly connected to the bracket 31, and three heat exchange tubes 33 are provided. The three heat exchange tubes 33 are connected to the steam drum 32 pipeline, and the three heat exchange tubes 33 are fixedly connected to the inner ring of the bearing 453.

[0051] Three heat exchange tubes 33 are provided, and the heat exchange tube 33 near the flue gas outlet is connected to an external water source. The external water source enters the heat exchange tube 33 and absorbs the waste heat of the flue gas to heat up. The water after absorbing the heat passes through the pipe of the mounting seat 451 and fixes the steam drum 32 through the bracket 31, so that the water in the heat exchange tube 33 flows into the steam drum 32. The middle heat exchange tube 33 is connected to the bottom of the steam drum 32, so that the preliminarily heated water in the steam drum 32 flows into the middle heat exchange tube 33. The water in the middle heat exchange tube 33 and the steam drum 32 is forced to circulate by a water pump, so that the water in the middle heat exchange tube 33 absorbs heat and returns to the steam drum 32. The steam formed by absorbing heat flows into the heat exchange tube 33 near the flue gas inlet through the pipe on the upper part of the steam drum 32 for further heating, thereby realizing heat recovery of the flue gas.

[0052] Working principle: The spiral blades 21 set at the inlet make the flue gas rotate and flow, thereby preliminarily separating the dust in the flue gas. The flue gas pushes the guide plate 414, thereby rotating the rotating ring 412 and compressing the annular spring 411. When the flue gas flow rate decreases, the annular spring 411 resets, causing the rotating ring 412 to rotate in the opposite direction, thereby rotating the two No. 1 connecting rods 42 connected to the rotating ring 412 through the universal joint 43, so that the two No. 1 connecting rods 42 pull the heat exchange tube 33 to rotate. Through the connecting plate 44, the three groups of heat exchange tubes 33 are rotated along their central axis respectively, thereby adjusting the angles of the three groups of heat exchange tubes 33. The flue gas flows through the fan blades 513, and the flue gas pushes the fan blades 513 to rotate continuously, causing the rotating shaft 514 to rotate. The number one bevel gear 521 rotates with the rotating shaft 514, driving the number two bevel gear 522 to rotate, causing the transmission shaft 523 to rotate, driving the number one gear 524 to rotate, causing the number one gear 524 to drive the number two gear 525 to rotate, causing the reciprocating screw 526 to rotate, and the slider nut 527 to move up and down with the rotation of the reciprocating screw 526. The number three connecting rod 531 moves up and down with the slider nut 527, thereby driving the scraper 54 to move. When the flue gas heat exchange mechanism 3 rotates, the number two slide bar 535 rotates along the hinge, and the number three slide bar 534 slides horizontally on the number one slide bar 532. The number two slide bar 535 slides in the sliding groove 541, causing the scraper 54 to rotate synchronously, cleaning the heat exchange tube 33 in real time, thereby maintaining high heat exchange efficiency.

[0053] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A self-cleaning waste heat boiler with flue gas heat recovery, characterized by: The waste heat boiler comprises a shell (1), a separation mechanism (2), a flue gas heat exchange mechanism (3), a regulating mechanism (4) and a dust cleaning mechanism (5); the shell (1) and the separation mechanism (2) are fixedly connected; the flue gas heat exchange mechanism (3) and the shell (1) are fixedly connected; the regulating mechanism (4) and the shell (1) are fixedly connected; the flue gas heat exchange mechanism (3) and the regulating mechanism (4) are fixedly connected; and the dust cleaning mechanism (5) and the flue gas heat exchange mechanism (3) are fixedly connected.

2. The self-cleaning waste heat boiler with flue gas heat recovery according to claim 1, characterized in that: The regulating mechanism (4) comprises a No. 1 driving unit (41), a No. 1 connecting rod (42), a universal joint (43), a connecting plate (44) and a rotating unit (45); the No. 1 driving unit (41) is slidably connected to the housing (1); two universal joints (43) are provided; the No. 1 driving unit (41) is fixedly connected to one universal joint (43); both ends of the No. 1 connecting rod (42) are fixedly connected to the two universal joints (43); the other universal joint (43) is fixedly connected to the flue gas heat exchange mechanism (3); the connecting plate (44) is fixedly connected to the flue gas heat exchange mechanism (3); and the rotating unit (45) is fixedly connected to the flue gas heat exchange mechanism (3).

3. The self-cleaning waste heat boiler with flue gas heat recovery according to claim 2, characterized in that: The No. 1 driving unit (41) comprises an annular spring (411), a rotating ring (412), a No. 1 slider (413) and a guide plate (414); the housing (1) is provided with an annular groove (11); the annular spring (411) is placed in the annular groove (11); the annular spring (411) and the No. 1 slider (413) are fixedly connected; the rotating ring (412) and the housing (1) are slidably connected; a plurality of guide plates (414) are provided; and a plurality of the guide plates (414) and the rotating ring (412) are fixedly connected.

4. The self-cleaning waste heat boiler with flue gas heat recovery according to claim 3 is characterized in that: The rotating unit (45) includes a mounting seat (451), a No. 1 sealing ring (452), a bearing (453) and a No. 2 sealing ring (454); the mounting seat (451) is fixedly connected to the housing (1); the No. 1 sealing ring (452) is fixedly connected to the mounting seat (451); the outer ring of the bearing (453) is fixedly connected to the mounting seat (451); the inner ring of the bearing (453) is fixedly connected to the flue gas heat exchange mechanism (3); and the No. 2 sealing ring (454) is fixedly connected to the mounting seat (451).

5. The self-cleaning waste heat boiler with flue gas heat recovery according to claim 4, characterized in that: The dust cleaning mechanism (5) comprises a No. 2 driving unit (51), a transmission unit (52), a moving unit (53), a scraper (54), a No. 2 connecting rod (55) and a No. 2 sliding block (56), wherein the No. 2 driving unit (51) is fixedly connected to the housing (1), the No. 2 driving unit (51) and the transmission unit (52) are fixedly connected, the transmission unit (52) and the moving unit (53) are fixedly connected, the scraper (54) and the moving unit (53) are fixedly connected, the No. 2 connecting rod (55) is fixedly connected to the connecting plate (44), the No. 2 sliding block (56) and the No. 2 connecting rod (55) are slidably connected, and the No. 2 sliding block (56) and the scraper (54) are fixedly connected.

6. The self-cleaning waste heat boiler with flue gas heat recovery according to claim 5, characterized in that: The second drive unit (51) comprises a fixed rod (511), a mounting shell (512), a fan blade (513) and a rotating shaft (514); the fixed rod (511) is fixedly connected to the housing (1); the fixed rod (511) is fixedly connected to the mounting shell (512); the rotating shaft (514) is rotatably connected to the mounting shell (512); and the fan blade (513) is fixedly connected to the rotating shaft (514).

7. The self-cleaning waste heat boiler with flue gas heat recovery according to claim 6, characterized in that: The transmission unit (52) includes a first bevel gear (521), a second bevel gear (522), a transmission shaft (523), a first gear (524), a second gear (525), a reciprocating screw (526) and a slider nut (527), wherein the first bevel gear (521) is fixedly connected to the rotating shaft (514), the second bevel gear (522) is meshed with the first bevel gear (521), and the transmission shaft (523) and the second bevel gear ( 522) is fixedly connected, the transmission shaft (523) and the housing (1) are rotationally connected, the No. 1 gear (524) and the transmission shaft (523) are fixedly connected, the No. 1 gear (524) and the No. 2 gear (525) are meshed, the reciprocating screw (526) and the No. 2 gear (525) are fixedly connected, the reciprocating screw (526) and the housing (1) are rotationally connected, and the slider nut (527) and the reciprocating screw (526) are slidingly connected.

8. The self-cleaning waste heat boiler with flue gas heat recovery according to claim 7, characterized in that: The mobile unit (53) comprises a No. 3 connecting rod (531), a No. 1 slide bar (532), a guide rail (533), a No. 3 slider (534) and a No. 2 slide bar (535); the No. 3 connecting rod (531) is fixedly connected to the slider nut (527); the No. 1 slide bar (532) is fixedly connected to the No. 3 connecting rod (531); the guide rail (533) is slidably connected to the No. 1 slide bar (532); the guide rail (533) is fixedly connected to the housing (1); the No. 3 slider (534) is slidably connected to the No. 1 slide bar (532); the No. 2 slide bar (535) is hingedly connected to the No. 3 slider (534); the scraper (54) is provided with a sliding groove (541); the No. 2 slide bar (535) is slidably connected to the sliding groove (541).

9. The self-cleaning waste heat boiler with flue gas heat recovery according to claim 8, characterized in that: The separation mechanism (2) comprises a spiral blade (21), a connecting cylinder (22) and a fixed shaft (23); the spiral blade (21) and the connecting cylinder (22) are fixedly connected; the fixed shaft (23) and the spiral blade (21) are fixedly connected; and the connecting cylinder (22) and the housing (1) are fixedly connected.

10. The self-cleaning waste heat boiler with flue gas heat recovery according to claim 9, characterized in that: The flue gas heat exchange mechanism (3) comprises a bracket (31), a steam drum (32) and a heat exchange tube (33); the bracket (31) is fixedly connected to the outer shell (1); the steam drum (32) is fixedly connected to the bracket (31); three heat exchange tubes (33) are provided; the three heat exchange tubes (33) are connected to the steam drum (32) pipeline; and the three heat exchange tubes (33) are fixedly connected to the inner ring of the bearing (453).

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