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CN-121557774-B - Waste heat recycling device and method for steam boiler

CN121557774BCN 121557774 BCN121557774 BCN 121557774BCN-121557774-B

Abstract

The invention discloses a waste heat recycling device and a waste heat recycling method of a steam boiler, which relate to the technical field of waste heat equipment of the steam boiler and comprise a steam boiler shell, wherein a steam boiler bracket is fixedly arranged on the outer side of the steam boiler shell, a steam boiler main body is fixedly arranged on the inner side of the steam boiler shell, the flue gas output end of one side of the steam boiler support, which is close to the steam boiler main body, is fixedly connected with the waste heat recovery device, and the inside of the steam boiler main body is provided with a plurality of flue pipes along the horizontal direction. The condition that the flue gas outlet of the traditional boiler has serious flue gas deviation (namely local high temperature and high speed) is changed, so that each part of heating surface of the waste heat recovery device can work efficiently and safely under the design working condition.

Inventors

  • YU HAIPENG
  • OU NINGNING
  • LI BAOZHONG
  • JIAO ZITONG
  • WANG XIAOLONG

Assignees

  • 青岛胜利锅炉有限公司

Dates

Publication Date
20260508
Application Date
20251230

Claims (8)

  1. 1. The utility model provides a waste heat recovery utilizes device of steam boiler which characterized in that includes: A steam boiler shell (1), wherein a steam boiler bracket (11) is fixedly arranged on the outer side of the steam boiler shell (1); The steam boiler comprises a steam boiler body (12), wherein the steam boiler body is fixedly arranged on the inner side of a steam boiler shell (1), a waste heat recovery device (5) is fixedly connected to the flue gas output end, close to the steam boiler body (12), of one side of a steam boiler bracket (11), and a plurality of flue pipes (13) are arranged in the steam boiler body (12) along the horizontal direction; The self-adjusting flow guide mechanisms are arranged on the inner sides of the smoke pipes (13) and comprise metal folding plates (23), the metal folding plates (23) are respectively arranged on the inner sides of the smoke pipes (13) and close to the smoke inlet, and the deformation of the metal folding plates (23) is used for changing the flow area of the smoke inlet of the smoke pipe (13) where the metal folding plates are arranged; The turbulence mechanism is arranged at the inner sides of the smoke pipes (13) and close to the middle of the smoke pipes, and comprises two second springs (34), wherein the two second springs (34) are arranged on the inner side walls of the smoke pipes (13) close to the upper parts, the lower ends of the two second springs (34) are fixedly connected with metal sheets (35), and vibration of the second springs (34) and the metal sheets (35) is used for disturbing the inner walls of the smoke pipes (13) where the second springs are positioned; the flexible connecting mechanism is arranged at the joint between the two ends of the smoke tubes (13) and the steam boiler main body (12), and comprises two metal corrugated pipes (42), the two ends of the two metal corrugated pipes (42) are respectively in sealing connection with the end parts of the smoke tubes (13) and the steam boiler main body (12), and the metal corrugated pipes (42) are used for compensating the thermal deformation difference between the smoke tubes (13) and the steam boiler main body (12).
  2. 2. The waste heat recycling device of a steam boiler according to claim 1, wherein the self-adjusting diversion mechanism further comprises a first fixing block (21), the first fixing block (21) is fixedly connected to the inner side of the smoke tube (13), a base (22) is fixedly connected to the inner side of the first fixing block (21) close to the smoke inlet of the smoke tube, the metal folding plate (23) is vertically and fixedly connected to the base (22), a fixing rod (26) is fixedly connected to the upper side of the metal folding plate (23), sliding fit is conducted between two sliding blocks (25) and the base (22) close to the sliding blocks, a first spring (24) is fixedly connected between the two sliding blocks (25) and the base (22), a medicine box (28) is installed between the first fixing block (21) close to the base (22), a cylindrical box (281) is connected to the inner thread of the medicine box (28), a movable cover (283) is rotatably connected to the upper surface of the medicine box (28), and a movable cover (283) is fixedly connected to the movable cover (26) and the movable cover (283).
  3. 3. The waste heat recycling device of a steam boiler according to claim 2, wherein the self-adjusting diversion mechanism further comprises a miniature electric telescopic rod (27), the miniature electric telescopic rod (27) is fixedly installed on the outer side of the steam boiler shell (1), a sealing sliding block (271) is fixedly connected to the telescopic end of the miniature electric telescopic rod (27), the steam boiler shell (1) is close to a thermal insulation cover (273) fixedly connected with the miniature electric telescopic rod (27), the thermal insulation cover (273) is connected to a smoke pipe (13) close to the thermal insulation cover (273), a through groove is formed in the inner side of the thermal insulation cover (273), the sealing sliding block (271) is in limiting sliding connection with the thermal insulation cover (273), a traction rope (272) is fixedly installed on one side, far away from the miniature electric telescopic rod (27), of the sealing sliding block (271), and the traction rope (272) is fixedly connected to a sliding block (25).
  4. 4. A waste heat recovery and utilization device of a steam boiler according to claim 3, characterized in that the self-adjusting diversion mechanism further comprises a temperature sensor (29), wherein the temperature sensor (29) is fixedly arranged at a position of the first fixing block (21) close to the medicament box (28).
  5. 5. The waste heat recycling device of a steam boiler according to claim 1, wherein the turbulence mechanism further comprises a second fixing block (31), the second fixing block (31) is fixedly connected to the inner side of the smoke tube (13) near the middle part of the smoke tube, and two diversion blocks (32) are fixedly connected to the inner side of the second fixing block (31) at equal distances.
  6. 6. The waste heat recycling device of a steam boiler according to claim 1, wherein the flexible connection mechanism further comprises a plurality of protection blocks (46), the protection blocks (46) are fixedly connected to the outer sides of the steam boiler main body (12) close to the plurality of smoke tubes (13), the inner sides of the protection blocks (46) are fixedly connected with fixed clamping rings (44), the inner sides of the protection blocks (46) away from the fixed clamping rings (44) are fixedly connected with three second spring rods (45) at equal distances, and the other ends of the three second spring rods (45) are fixedly connected to one movable clamping ring (43).
  7. 7. The waste heat recycling device of a steam boiler according to claim 6, wherein the flexible connecting mechanism further comprises a clamping block (41), the clamping block (41) is fixedly connected to the outer sides, close to the ends of the smoke tubes (13), of the plurality of metal corrugated tubes (42), and the clamping block (41) is clamped with a movable clamping ring (43) and a fixed clamping ring (44) which are close to each other.
  8. 8. A waste heat recovery and utilization method of a steam boiler, applied to a waste heat recovery and utilization device of a steam boiler as set forth in any one of claims 1 to 7, comprising the steps of: S1, starting a steam boiler main body (12) to enable high-temperature smoke generated by the steam boiler main body to enter the smoke tube (13) through a smoke inlet of the smoke tube (13), when the internal temperature of the smoke tube (13) is higher than a preset value, indicating that the smoke passing through the smoke tube (13) is more than the preset value, wherein a temperature sensor (29) is higher than the preset temperature, and driving a metal folding plate (23) to be opened through a miniature electric telescopic rod (27), so as to adjust the flow area at the smoke inlet of the smoke tube (13), and enable the smoke to pass through other pipelines, so that the self-adaptive regulation of the smoke flow is realized; s2, in the process that the high-temperature flue gas flows in the flue pipe (13), the metal sheet (35) in the turbulence mechanism is impacted to drive the second spring (34) to vibrate, the vibration effect is used for disturbing the inner wall of the flue pipe (13), meanwhile, the contact sufficiency of the flue gas and the inner wall of the flue pipe (13) is enhanced, and the waste heat transfer efficiency is improved; S3, when smoke flows in the smoke tube (13) and the device runs, and when the smoke tube (13) and the steam boiler main body (12) generate thermal deformation due to temperature difference, the metal corrugated tube (42) in the flexible connecting mechanism adaptively stretches and contracts, and the elastic buffering function of the second spring rod (45) is matched to compensate the thermal deformation difference between the smoke tube and the steam boiler main body, and meanwhile, the clamping block (41) is matched with the movable clamping ring (43) and the fixed clamping ring (44) in a clamping way, so that the sealing stability of a connecting part is ensured; s4, discharging the low-temperature flue gas subjected to heat exchange through the flue pipe (13) out of the flue pipe (13), and enabling the low-temperature flue gas to enter a waste heat recovery device (5) for subsequent waste heat recovery treatment, so that the whole waste heat recovery and utilization process is completed.

Description

Waste heat recycling device and method for steam boiler Technical Field The invention relates to the technical field of waste heat equipment of steam boilers, in particular to a waste heat recycling device and method of a steam boiler. Background The steam boiler is a thermal power equipment which converts chemical energy of fuel into thermal energy and further heats water into steam with certain temperature and pressure, and smoke discharged during the operation of the steam boiler carries a large amount of waste heat which is not fully utilized, and the waste heat can cause serious energy waste if being directly discharged. The waste heat recycling device can convert the waste heat into energy form capable of being secondarily utilized through heat exchange, heat conduction and the like. The conventional boiler furnace is mostly rectangular in section, and the furnace outlet (connected with a horizontal flue or a tail vertical shaft) is often asymmetric in geometric structure due to the arrangement of the burner. For example, a boiler with a burner arranged on one side is deviated to one side in the flame center, and a bias flow effect is formed at a hearth outlet by high-temperature flue gas, so that the condition of uneven distribution during flue gas circulation occurs, and the air flow entering a flue pipe is uneven, if the temperature of a part of flue pipe is too high and the temperature difference with other flue pipes is too large, the pipe wall of the high-temperature flue pipe is heated unevenly, larger thermal stress is generated, the problem that the pipe wall is easy to deform, crack and even leak is easy to occur during long-term operation, meanwhile, the common ash deposition on the flue pipe and the waste heat recovery surface is serious, equipment blockage, abrasion and corrosion are aggravated, ash cleaning maintenance is frequent and high in cost, in addition, the rigid connection between the flue pipe and the boiler body cannot effectively absorb the thermal stress and vibration, the axial and radial expansion of the flue pipe are limited, the tensile stress or the shearing stress is generated at the connection welding seam of the flue pipe and the body, and the long-time cold and hot circulation can enable the stress to be repeatedly overlapped, so that fatigue cracks appear on weld metal and finally crack and leak. Therefore, a person skilled in the art provides a device and a method for recycling waste heat of a steam boiler, so as to solve the problems in the prior art. Disclosure of Invention The invention aims to provide a waste heat recycling device and method for a steam boiler, which are used for solving the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: The utility model provides a waste heat recovery utilizes device of steam boiler, includes steam boiler shell, steam boiler shell's outside fixed mounting has steam boiler support, steam boiler shell inboard fixed mounting has steam boiler main part, steam boiler support one side is close to the flue gas output fixedly connected with waste heat recovery device of steam boiler main part, the inside of steam boiler main part is provided with a plurality of tobacco pipes along the horizontal direction, the inboard of a plurality of tobacco pipes is equipped with self-interacting guiding mechanism, self-interacting guiding mechanism includes the metal folded sheet, the metal folded sheet is installed in the inboard position that is close to the inlet of a plurality of tobacco pipes, the deformation of metal folded sheet is used for changing the flow area of the inlet of its place tobacco pipe, the inboard of a plurality of tobacco pipes is close to middle part and is equipped with vortex mechanism, vortex mechanism includes the second spring, two the second spring is installed in the inside wall that the tobacco pipe is close to upper portion, two the equal fixedly connected with sheet metal of lower extreme of second spring, the vibration of second spring and sheet are used for disturbing its place inner wall, the junction between a plurality of both ends and the steam boiler main part is equipped with flexible connection mechanism, flexible connection mechanism includes the metal bellows, the tip of metal bellows and the boiler main part of the bellows are used for compensating for the thermal deformation difference of the steam bellows between the boiler main part and the steam bellows respectively. The self-adjusting flow guiding mechanism further comprises a first fixed block, wherein the first fixed block is fixedly connected to the inner sides of the smoke pipes, bases are fixedly connected to the inner sides of the first fixed block close to smoke inlets of the first fixed block, the metal folding plates are vertically and fixedly connected to the bases, a fixed rod is fixedly connected to the upper sides of the metal folding p