Energy-saving boiler waste heat utilization absorption barrel

Abstract

The invention relates to the technical field of boiler waste heat recovery, in particular to an energy-saving boiler waste heat utilization absorption barrel which comprises a working barrel, a cover plate, an air outlet barrel, an air box and an air pipe. An air cavity is formed in the working barrel, heat absorption fins evenly distributed in the circumferential direction are fixedly arranged on the air outlet barrel, and a heat absorption barrel is fixedly arranged at the inner ends, close to the air outlet barrel, of the heat absorption fins; a protection cylinder is connected and attached to the interior of the heat absorption cylinder, a spirally-wound heat absorption water pipe is arranged on the periphery of the protection cylinder, heat absorption fins are provided with spiral channels with threads extending upwards, the spiral channels can stretch out and draw back, a cleaning mechanism is arranged in the working cylinder, a guide cylinder is fixedly arranged at the lower end of a cover plate, dust removal is facilitated, and therefore the structure of a dust removal mechanism part can be simplified; hot air flows twice in the inner circle and the outer circle of the air outlet barrel, the flowing time of the hot air in the working barrel is prolonged, and therefore the heat absorption effect is improved, the hot air flows slowly through the spiral channel, the standing time of the hot air is further prolonged, and meanwhile smoke dust in the hot air is concentrated on the periphery of the air outlet barrel, and treatment is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of boiler waste heat recovery, in particular to an energy-saving boiler waste heat utilization absorption cylinder. Background Art

[0002] Industrial boilers are common thermal equipment. Industrial boilers generally use coal as a combustion raw material for power generation or gas supply. Under existing technology, the combustion of coal in the boiler will produce a lot of waste flue gas and carry a lot of waste heat. Direct discharge of boiler flue gas will lead to heat loss and cause energy waste.

[0003] Common boiler flue gas waste heat absorption equipment in the prior art often heats the heat exchange medium by isolating the waste heat exchange with heat conductive materials. Since the exhaust gas contains a large amount of soot to form flue gas, after the equipment has been working for a period of time, a large amount of soot will adhere to its heat conductive material, which will prevent the efficiency of heat exchange of the waste heat in the boiler flue gas, thereby reducing the efficiency of boiler flue gas waste heat absorption, and the flow speed of the flue gas in the heat conductive material is too fast, resulting in the need to connect multiple heat exchange equipment for installation to complete the waste heat utilization, resulting in heavy installation and disassembly work. Summary of the invention

[0004] The object of the present invention is to provide an energy-saving boiler waste heat utilization absorption tube to overcome the above-mentioned defects in the prior art.

[0005] The vent pipe is provided with a cover for the heat-absorbing gas cylinder, the cover having a detachable cover plate at the upper end thereof, and an air cavity is provided in the working cylinder, and an air outlet is provided in the air cavity, and an air box is provided on the outer circumference of the air outlet cylinder, and an air pipe evenly distributed in the circumference is provided on the upper end of the air box, and the air pipe extends upward into the air cavity and is connected with the working cylinder, and a heat absorbing fin evenly distributed in the circumference is provided on the air outlet cylinder, and a heat absorbing cylinder is provided near the end of the air outlet cylinder, and a protective cylinder is connected and attached to the heat absorbing cylinder, and a spirally wound hot water absorbing pipe is provided on the outer circumference of the protective cylinder, and a spiral path extending upward by a thread is provided on the heat absorbing fin, and the spiral path can be retracted and retracted, and a connecting port between the air pipe and the working cylinder is provided at the outer end part of the air outlet cylinder, and a cleaning mechanism is provided in the working cylinder, and the cleaning mechanism includes a collecting mechanism fixedly connected to the circumferential side wall of the air cavity. The dust box is located at the upper end of the air outlet tube, and the inner circumference of the dust box is affixed with a temporary storage ring evenly distributed in the circumference, and two adjacent temporary storage rings are fixedly connected, and a scraper is connected to the inner circumference of each temporary storage ring, and the scraper is inclined upward as a whole, and a hanging groove is opened between the temporary storage ring and the scraper, and the hanging groove in the temporary storage ring is annularly arranged, and the hanging groove at the scraper is opened along the edge, and a connecting hole is opened between the dust box and each of the temporary storage rings, and an exhaust mechanism is provided at the dust box through a connecting pipe. The three side portions of the hanging groove on the scraper can abut the side of the heat absorbing fin and the outer circumference of the air outlet tube, and two temperature detectors distributed up and down are provided in the working cylinder, and a temperature detector is provided on the inner circumference of the air outlet tube, and the temperature detector and the temperature detector are connected to the controller at the outer end through a telecommunication connection, and a guide cylinder is fixed at the lower end of the cover plate.

[0006] Optionally, the cover plate is provided with a fixing rod extending downwardly, and a fixing frame is slidably connected to the outer periphery of the fixing rod, and four extension plates are fixedly provided on the outer periphery of the fixing frame, and sharp points are fixedly provided at the upper ends of the four extension plates, and the heat absorption tube is provided with circumferentially evenly distributed card grooves, which can be clamped with the four extension plates at the fixing frame, and a pressure sensor is fixedly provided at the lower end position of the fixing rod, and the upper end of the pressure sensor abuts against the lower end of the fixing frame, and the lower end opening of the guide tube is narrowed inwardly, and the upper end circumferential surface of the guide tube abuts against the peripheral side walls of the air cavity, and a connecting box and a cylinder are fixedly provided at the upper end of the cover plate, the connecting box extends left and right, and telescopic gas rods are connected on the left and right ends of the connecting box, and the cylinder is connected to the connecting box.

[0007] The beneficial effects of the present invention are:

[0008] Water does not come into direct contact with hot air, and water vapor formed by evaporation does not come into contact with hot air. The protective tube seal prevents water vapor from absorbing smoke to form scale, which in turn makes the dust removal mechanism difficult to clean.

[0009] Dust removal is convenient, so that the structure of the dust removal mechanism can be simplified. The hot air flows twice in the inner and outer circles of the air outlet tube, which increases the flow time of the hot air in the working tube, thereby improving the heat absorption effect.

[0010] The hot air flows slowly through the spiral channel, which further increases the residence time of the hot air. At the same time, the smoke and dust in the hot air are concentrated on the peripheral part of the air outlet tube for easy processing.

[0011] The pressure value is detected by the pressure sensor, and the thrust caused by the air flow is reduced through the tip, thereby improving the detection accuracy of the pressure sensor. The pressure sensor is used to determine whether the air outlet and the heat-absorbing fins need to be cleaned, and the dust removal mechanism is automatically controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the appearance of the present invention;

[0013] Figure 2 The present invention Figure 1 A schematic diagram of a top view structure;

[0014] Figure 3 The present invention Figure 1 Schematic diagram of the appearance after removing the working cylinder;

[0015] Figure 4 The present invention Figure 2 Schematic cross-sectional view of AA in the figure;

[0016] Figure 5 The present invention Figure 4 A partial enlarged schematic diagram of the cleaning mechanism in the middle;

[0017] Figure 6 The present invention Figure 4 A partial enlarged schematic diagram of the middle fixing frame;

[0018] Figure 7 The present invention Figure 4 A partial enlarged schematic diagram of the midtrachea;

[0019] Figure 8 The present invention Figure 3 Schematic diagram of the partial appearance of the heat absorbing fin after the spiral channel is removed in the state;

[0020] Fig. 9 The present invention Figure 3 Schematic diagram of the partial appearance of the temporary storage ring and the scraper at the middle air box in the state;

[0021] In the figure:

[0022] 10. Working cylinder; 11. Cover plate; 12. Air outlet cylinder; 13. Air box; 14. Air pipe; 15. Connecting box; 16. Air cylinder; 17. Telescopic air rod; 18. Temperature detector; 19. Air cavity; 20. Spiral channel; 21. Heat absorbing fins; 22. Heat absorbing cylinder; 23. Card slot; 24. Fixed frame; 25. Dust collection box; 26. Connecting hole; 27. Temporary storage ring; 28. Scraper; 29. ​​Connecting block; 30. Hanging slot; 31. Fixed rod; 32. Pressure sensor; 33. Tip; 34. Protective cylinder; 35. Heat absorbing pipe; 37. Guide cylinder; 38. Cleaning mechanism; 39. Temperature detector. DETAILED DESCRIPTION

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] Embodiment 1:

[0025] Reference Figure 1-Figure 9According to an embodiment of the present invention, an energy-saving boiler waste heat utilization absorption cylinder includes a working cylinder 10, a detachable cover plate 11 is fixedly arranged at the upper end of the working cylinder 10, an air cavity 19 is opened in the working cylinder 10, an air outlet cylinder 12 is fixedly arranged in the air cavity 19 and extends downward and penetrates, an air box 13 is fixedly arranged on the outer periphery of the air outlet cylinder 12, an air pipe 14 evenly distributed in the circumferential direction is fixedly arranged at the upper end of the air box 13, the air pipe 14 extends upward into the air cavity 19 and communicates with the working cylinder 10, and an air outlet cylinder 12 is fixedly arranged with a circumferentially evenly distributed air pipe 14. The heat absorbing fins 21 are evenly distributed, and the heat absorbing fins 21 are fixedly provided with a heat absorbing tube 22 near the end of the air outlet tube 12. The heat absorbing tube 22 is connected with a protective tube 34, and a spirally wound hot water absorbing pipe 35 is provided on the outer periphery of the protective tube 34. The heat absorbing fins 21 are provided with a spiral path 20 extending upward by a thread, and the spiral path 20 can be retracted. The connecting port between the air pipe 14 and the working tube 10 is set at the outer end part of the air outlet tube 12, and a cleaning mechanism 38 is provided in the working tube 10. The cleaning mechanism 38 includes a sealing member 34 and a sealing member 35. A dust collecting box 25 is fixedly connected, and the dust collecting box 25 is located at the upper end of the air outlet 12. A temporary storage ring 27 evenly distributed in the circumferential direction is attached to the inner circumferential surface of the dust collecting box 25. Two adjacent temporary storage rings 27 are fixedly connected. A scraper 28 is connected to the inner circumferential surface of each temporary storage ring 27. The scraper 28 is tilted upward as a whole. A hanging groove 30 is connected between the temporary storage ring 27 and the scraper 28. The hanging groove 30 in the temporary storage ring 27 is arranged in an annular shape, and the hanging groove 30 at the scraper 28 is opened along the edge. The dust collecting box 25 is connected to each temporary storage The rings 27 are connected with connecting holes 26, and the dust box 25 is connected with an exhaust mechanism through a connecting pipe. The three side portions of the hanging groove 30 on the scraper 28 can abut against the side of the heat-absorbing fin 21 and the outer peripheral surface of the air outlet cylinder 12. Two temperature detectors 18 distributed up and down are arranged in the working cylinder 10, and a temperature detector 39 is arranged on the inner peripheral surface of the air outlet cylinder 12. The temperature detector 18 and the temperature detector 39 are connected to the controller at the outer end through a telecommunication connection. A guide cylinder 37 is fixed at the lower end of the cover plate 11;

[0026] The hot air enters the air box 13 through the connecting pipe, and at the air box 13, it flows upward through the circumferentially evenly distributed air pipe 14 connected at the upper end, and enters the peripheral area of ​​the working cylinder 10 located at the outlet cylinder 12, and passes through the spiral path 20 arranged at the peripheral part of the outlet cylinder 12. The hot air spiral path 20 flows upward in a spiral, increasing the flow time of the hot air at the peripheral part of the outlet cylinder 12. After passing through the spiral path 20, the hot air flows upward to the guide cylinder 37, and at the lower part of the guide cylinder 37 The end arc surface part flows downward to between the air outlet tube 12 and the heat absorption tube 22, and the hot air flows vertically downward through the heat absorption tube 22, and is discharged outward through the air outlet tube 12, and enters the subsequent equipment for processing through the connection relationship at the air outlet tube 12. The temporary storage ring 27 and the scraper 28 fixedly connected slide up and down. During the downward sliding process of the temporary storage ring 27, the temporary storage ring 27 drives the scraper 28 to slide downward synchronously, and the groove edge of the hanging groove 30 on the scraper 28 abuts against the air outlet tube 12 and the heat absorption fin 21. Then, dust on the air outlet tube 12 and the heat absorbing fin 21 is removed, and the dust falls on the side wall of the hanging groove 30. Through the connection between the hanging grooves 30, the dust gathers at the hanging groove 30 in the temporary storage ring 27 under the inclined scraper 28, and the temporary storage ring 27 and the scraper 28 move upward and reset, during which the second dust cleaning work is carried out. When the temporary storage ring 27 moves upward and resets, the connecting holes 26 on the inner and outer sides are connected, and the dust collecting box 25 collects dust in the dust collecting box 25 under the operation of the connected exhaust mechanism. The temperature detector 18 located at the lower part of the air cavity 19 detects the temperature of the air blown out from the air pipe 14, and the temperature detector 18 at the upper side guide tube 37 detects the temperature of the air blown out from the spiral path 20. The temperature of the lower end of the heat absorbing tube 22 is detected by the temperature detector 39. The values ​​detected by the two temperature detectors 18 and the temperature detector 39 are compared to detect whether the heat absorption work is carried out smoothly, and the results and working status are displayed on the display terminal at the outer end.

[0027] Embodiment 2:

[0028] With reference to Example 1, according to an energy-saving boiler waste heat utilization absorption tube of an embodiment of the present invention, optionally, a fixing rod 31 extending downward is provided on the cover plate 11, a fixing frame 24 is slidably connected to the outer periphery of the fixing rod 31, four extension plates are fixedly provided on the outer periphery of the fixing frame 24, and a tip 33 is fixedly provided on the upper end of the four extension plates, and a card groove 23 evenly distributed in the circumferential direction is opened on the heat absorption tube 22, and the card groove 23 can be clamped with the four extension plates at the fixing frame 24, and a pressure sensor 32 is fixedly provided at the lower end position of the fixing rod 31, and the upper end of the pressure sensor 32 abuts against the lower end of the fixing frame 24, and the lower end opening of the guide tube 37 is narrowed inwardly, and the upper end circumferential surface of the guide tube 37 abuts against the peripheral side wall of the air cavity 19, and a connecting box 15 and a cylinder 16 are fixedly provided on the upper end of the cover plate 11, and the connecting box 15 extends left and right, and a telescopic gas rod 17 is connected to the left and right ends of the connecting box 15, and the cylinder 16 is connected to the connecting box 15;

[0029] The heat absorbing fin 21 and the heat absorbing tube 22 are fixedly mounted on the fixing frame 24 through the card slots at the card slots 23. After the hot air flows upward through the outer end portion of the heat absorbing fin 21, it flows downward between the outlet tube 12 and the heat absorbing tube 22 under the guidance of the guide tube 37. The smoke and fine particles carried in the hot air adhere to the outer end portion of the heat absorbing fin 21 and the outer peripheral surface of the outlet tube 12, thereby increasing the weight of the heat absorbing fin 21 and the heat absorbing tube 22, and increasing the pressure value at the pressure sensor 32. When the set value at the pressure sensor 32 is reached, the cylinder 16 is powered on to increase the air pressure in the connecting box 15. The communication arrangement of the telescopic gas rod 17 controls the telescopic part of the lower end of the telescopic gas rod 17 to extend downward, thereby pushing the connecting block 29 fixedly connected to the lower end of the telescopic gas rod 17 to slide downward, and enter to push the temporary storage ring 27 and the scraper 28 to slide downward. When the temporary storage ring 27 and the scraper 28 slide downward to the bottom along the air outlet tube 12, the cylinder 16 controls the telescopic gas rod 17 to retract upward, so that the connecting block 29 synchronously drives the temporary storage ring 27 and the scraper 28 to slide upward, and abuts against the outer end part of the air outlet tube 12 and the heat absorbing fin 21 through the hanging groove 30 on the scraper 28, so as to remove the smoke and fine particles adsorbed by the air outlet tube 12 and the heat absorbing fin 21.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The above contents are merely examples and explanations of the structure of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. An energy-saving boiler waste heat utilization absorption cylinder, comprising a working cylinder (10), a cover plate (11), an air outlet cylinder (12), an air box (13), and an air pipe (14), characterized in that: An air cavity (19) is provided in the working cylinder (10), and heat absorbing fins (21) evenly distributed in the circumferential direction are fixedly provided on the air outlet cylinder (12). A heat absorbing cylinder (22) is fixedly provided near the inner end of the heat absorbing fins (21) of the air outlet cylinder (12), and a protective cylinder (34) is connected and attached to the inside of the heat absorbing cylinder (22). A spirally wound hot water absorbing pipe (35) is provided on the outer periphery of the protective cylinder (34), and a spiral path (20) extending upward with a thread is provided on the heat absorbing fins (21), and the spiral path (20) can be retracted. A cleaning mechanism (38) is provided in the working cylinder (10), and a guide cylinder (37) is fixedly provided at the lower end of the cover plate (11).

2. The energy-saving boiler waste heat utilization absorption tube according to claim 1 is characterized in that: The cleaning mechanism (38) comprises a dust box (25) fixedly connected to the peripheral wall of the air cavity (19), the dust box (25) being located at the upper end of the air outlet tube (12), the inner peripheral surface of the dust box (25) being fixedly connected with temporary storage rings (27) evenly distributed in the circumferential direction, two adjacent temporary storage rings (27) being fixedly connected, the inner peripheral surface of each temporary storage ring (27) being connected with a scraper (28), the scraper (28) being tilted upward as a whole, and a hanging groove (30) being connected between the temporary storage ring (27) and the scraper (28).

3. The energy-saving boiler waste heat utilization absorption tube according to claim 2 is characterized in that: The cover plate (11) is provided with a downwardly extending fixing rod (31), the outer periphery of the fixing rod (31) is slidably connected with a fixing frame (24), the outer periphery of the fixing frame (24) is fixedly provided with four extension plates, the upper ends of the four extension plates are fixedly provided with tips (33), the heat absorbing tube (22) is provided with circumferentially evenly distributed card slots (23), the card slots (23) can be carded with the four extension plates at the fixing frame (24), and the lower end of the fixing rod (31) is fixedly provided with a pressure sensor (32) The upper end of the pressure sensor (32) is in contact with the lower end of the fixing frame (24); the lower end opening of the guide tube (37) is narrowed inwardly; the upper end peripheral surface of the guide tube (37) is in contact with the peripheral side wall of the air cavity (19); a connecting box (15) and a cylinder (16) are fixedly provided at the upper end of the cover plate (11); the connecting box (15) extends left and right, and a telescopic gas rod (17) is connected to the left and right ends of the connecting box (15); and the cylinder (16) is connected to the connecting box (15).

4. The energy-saving boiler waste heat utilization absorption tube according to claim 3 is characterized in that: A connecting hole (26) is provided between the dust collecting box (25) and each of the temporary storage rings (27); an air extraction mechanism is provided at the dust collecting box (25) through an external connecting pipe; and three side portions of the hanging groove (30) on the scraper (28) can abut against the side surfaces of the heat absorbing fins (21) and the outer peripheral surface of the air outlet tube (12).

5. The energy-saving boiler waste heat utilization absorption tube according to claim 4 is characterized in that: Two temperature detectors (18) distributed vertically are arranged in the working cylinder (10), and a temperature detector (39) is arranged on the inner circumference of the gas outlet cylinder (12). Both the temperature detector (18) and the temperature detector (39) are connected to an external controller via a telecommunication connection.

6. The energy-saving boiler waste heat utilization absorption tube according to claim 5 is characterized in that: The heat absorbing fin (21) is arranged in the air cavity (19), and the heat absorbing fin (21) extends inside and outside and penetrates the air outlet cylinder (12), and the connecting port between the air pipe (14) and the working cylinder (10) is arranged at the outer end part of the air outlet cylinder (12).

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