CN220582478U - Energy-saving double-drum longitudinal boiler - Google Patents
Energy-saving double-drum longitudinal boiler Download PDFInfo
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- CN220582478U CN220582478U CN202322300115.XU CN202322300115U CN220582478U CN 220582478 U CN220582478 U CN 220582478U CN 202322300115 U CN202322300115 U CN 202322300115U CN 220582478 U CN220582478 U CN 220582478U
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- boiler
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- smoke
- water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000002918 waste heat Substances 0.000 claims abstract description 19
- 239000000779 smoke Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000002485 combustion reaction Methods 0.000 claims abstract 2
- 238000001816 cooling Methods 0.000 claims description 19
- 230000007423 decrease Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 23
- 239000003546 flue gas Substances 0.000 description 23
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The utility model discloses an energy-saving double-drum longitudinal boiler, wherein two parallel drums are arranged in a boiler body from top to bottom, a convection tube bundle and a heating tube bundle are communicated between the two drums, a burner with a combustion end positioned in the heating tube bundle is arranged on the boiler body, an induced draft fan is arranged on the boiler body on the opposite side of the heating tube bundle, an air outlet of the induced draft fan is communicated with an air inlet of a waste heat collector through a smoke duct, and a water outlet of the waste heat collector is communicated with a water inlet of the drum positioned at a lower position. According to the boiler, on the basis of offset of the double-drum longitudinal boiler burner, the smoke outlet mode of the tail of the boiler is changed into side smoke outlet mode, and the high-temperature smoke of the burner passes through the convection tube bundles between the upper boiler drum and the lower boiler drum under the guiding action of negative pressure, so that the boiler water body is heated by fully utilizing the high-temperature smoke in the boiler, the smoke is not discharged, heat loss is greatly reduced, and meanwhile, the heat of the smoke is secondarily utilized by the waste heat collector, so that the heat utilization efficiency of the boiler is effectively improved.
Description
Technical Field
The utility model relates to the technical field of boilers, in particular to an energy-saving double-drum longitudinal boiler.
Background
The double-drum longitudinal boiler consists of an upper drum, a lower drum, a membrane water-cooled wall, a convection bank and a burner, wherein the burner is arranged on the front wall of the boiler body, flame enters a hearth to heat the convection bank, and flue gas is discharged from the tail of the boiler through a chimney. In a common double-drum longitudinally-arranged boiler, a burner is biased in a furnace chamber so as to ensure that a two-stage heating effect can be formed relative to a convection tube bundle, one part of dissipated flame heats water in the convection tube bundle, and the other part of direct-fired flame heats water in the convection tube bundle to generate steam to enter an upper drum.
The offset setting mode of the burner can greatly utilize flame heat energy, but the flue gas at the tail of the flame can be directly discharged to a chimney at the tail of the burner and is utilized by external energy-saving equipment (a coal economizer), the waste heat utilization mode has limited efficiency, the heat energy dissipation of tail gas is still more, and an energy-saving double-drum longitudinal boiler capable of directly utilizing the flue gas heat energy in a furnace chamber and effectively reducing the heat energy dissipation of the flue gas is needed.
Disclosure of Invention
The utility model aims to provide an energy-saving double-drum longitudinal boiler, which aims to solve the problems that smoke at the tail of a flame can be directly discharged to a chimney at the tail of the boiler and the smoke cannot be directly utilized in a furnace chamber to cause more heat dissipation of heat energy tail gas in a bias arrangement mode of a double-drum longitudinal boiler burner.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides an energy-saving double-drum longitudinal boiler, includes the furnace body, install two parallel drums that top-down set up in the furnace body, two the intercommunication has convection bank and heating tube bank between the drum, be provided with the burning end on the furnace body and be located the combustor in the heating tube bank, the furnace body of heating tube bank opposite side is provided with the draught fan, the air outlet of draught fan passes through flue and waste heat collector's air inlet intercommunication, waste heat collector delivery port and be located lower the water inlet intercommunication of drum.
The further technical scheme is as follows: the waste heat collector comprises a box body, a heat exchange tube and spiral heat exchange plates, wherein the heat exchange tube is installed in the box body in an S shape, and the spiral heat exchange plates are arranged on the outer wall of the heat exchange tube.
The further technical scheme is as follows: the box body consists of a heat insulation board.
The further technical scheme is as follows: the air outlet end of the boiler barrel positioned at the higher position is provided with a condensed water collecting pipe which is spirally arranged on the smoke exhaust pipe of the boiler body, and the smoke exhaust pipe is arranged on the air outlet of the waste heat collector.
The further technical scheme is as follows: the inner wall of the furnace body is provided with a water cooling wall, and a water cooling pipe on the water cooling wall gradually decreases along the flame direction of the burner.
The further technical scheme is as follows: the water cooling pipe is communicated with an external water source through a water pump.
Compared with the prior art, the utility model has at least one of the following beneficial effects:
the utility model provides an energy-saving double-drum longitudinal boiler, which changes the traditional flue gas outlet position on the basis of the offset of a double-drum longitudinal boiler burner, changes the flue gas outlet mode of a boiler tail into side flue gas outlet mode, and ensures that high-temperature flue gas of the burner passes through a convection tube bundle between an upper boiler drum and a lower boiler drum under the guiding action of negative pressure to heat boiler water body by directly fully utilizing the high-temperature flue gas in the boiler, and the flue gas does not go out of the boiler, thereby greatly reducing heat loss, and simultaneously, the heat of the flue gas is secondarily utilized by a waste heat collector, so that the heat utilization efficiency of the boiler is effectively improved.
In addition, the collected condensed water can be utilized for the third time by means of the condensed water collecting pipe, and the temperature of the condensed water is convenient for the condensed water to flow back into the furnace.
Drawings
FIG. 1 is a schematic view of an energy-saving double-drum vertical boiler according to the present utility model.
Fig. 2 is a schematic diagram of the structure of fig. 1 from a top view of the present utility model.
Fig. 3 is a schematic diagram of the structure of the present utility model from the side view of fig. 1.
Reference numerals: 1. a furnace body; 2. a drum; 3. a convection bank; 4. a heating tube bundle; 5. an induced draft fan; 6. a smoke duct; 7. a waste heat collector; 8. a burner; 9. a case; 10. a heat exchange tube; 11. spiral heat exchange plates; 12. a smoke exhaust pipe; 13. a condensed water collecting pipe; 14. a water cooling wall; 15. a water-cooled tube.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.
In addition, the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present utility model and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Embodiment one:
this embodiment shows in fig. 1, fig. 2 and fig. 3, an energy-saving double-drum longitudinal boiler, including furnace body 1, install two parallel drums 2 that top-down set up in the furnace body 1, the intercommunication has convection bank 3 and heating tube bank 4 between two drums 2, be provided with the combustor 8 that the burning end is located heating tube bank 4 on the furnace body 1, furnace body 1 of heating tube bank 4 opposite side is provided with draught fan 5, the air outlet of draught fan 5 communicates with waste heat collector 7's air inlet through flue 6, waste heat collector 7 delivery port communicates with the water inlet of drum 2 that is located lower.
The working process of the utility model is as follows: on the basis that the double-drum longitudinally-arranged boiler combustor 8 is biased, the traditional flue gas outlet position is changed, the flue gas outlet mode of the tail of the boiler is changed into side flue gas outlet mode, and the high-temperature flue gas of the combustor 8 passes through the convection bank 3 between the upper boiler drum 2 and the lower boiler drum 2 under the negative pressure guiding action of the induced draft fan 5, so that the high-temperature flue gas is directly fully utilized in the boiler to heat the boiler water body, the flue gas is not discharged, heat loss is greatly reduced, and meanwhile, the heat of the flue gas is secondarily utilized by the waste heat collector, so that the heat utilization efficiency of the boiler is effectively improved.
Preferably, the waste heat collector 7 comprises a box body 9, a heat exchange tube 10 and spiral heat exchange fins 11, wherein the heat exchange tube 10 is installed in the box body 9 in an S shape, and the spiral heat exchange fins 11 are arranged on the outer wall of the heat exchange tube 10. The box 9 is composed of a heat insulation board.
The spiral heat exchange fins 11 can improve the heat exchange efficiency with the flue gas on the heat exchange tube 10, and the spiral heat exchange fins can also prolong the flow distance of the flue gas, along with long heat exchange time.
Embodiment two:
on the basis of the above embodiment, as shown in fig. 2 of the present embodiment, the air outlet end of the boiler barrel 2 located at a higher position is provided with a condensed water collecting pipe 13, the condensed water collecting pipe 13 is spirally arranged on the smoke exhaust pipe 12 of the boiler body 1, and the smoke exhaust pipe 12 is installed on the air outlet of the waste heat collector 7.
Practice shows that even though the secondarily utilized flue gas still has the temperature exceeding 100 ℃, condensed water generated by the cooling of the air outlet end (steam air outlet end) of the boiler barrel 2 can be heated, heat can be preserved, the tertiary utilization of the flue gas is realized, and the utilization rate of the flue gas is improved.
Preferably, a water cooling wall 14 is arranged on the inner wall of the furnace body 1, and a water cooling pipe 15 on the water cooling wall 14 gradually decreases along the flame direction of the burner 8. The water cooling pipe 15 is communicated with an external water source through a water pump.
The water cooling wall 14 is used for ensuring that the furnace body is not damaged by high temperature, the service life is prolonged, the water cooling pipes 15 on the water cooling wall 14 are gradually reduced, the weaker the flame of the burner 8 is, the more the flame is near the furnace tail, and the number of the water cooling pipes 15 is properly reduced in order to prevent the water cooling pipes 15 from reducing the temperature in the furnace.
Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.
Claims (6)
1. The utility model provides an energy-saving double-drum longitudinal boiler, includes furnace body (1), install two parallel drums (2) that top-down set up in furnace body (1), two communicate between drum (2) has convection bank (3) and heating tube bank (4), its characterized in that: the boiler is characterized in that a burner (8) with a combustion end located in the heating tube bundle (4) is arranged on the boiler body (1), a draught fan (5) is arranged on the boiler body (1) on one side opposite to the heating tube bundle (4), an air outlet of the draught fan (5) is communicated with an air inlet of a waste heat collector (7) through a smoke duct (6), and a water outlet of the waste heat collector (7) is communicated with a water inlet of the boiler barrel (2) located at a lower position.
2. The energy-efficient double drum longitudinal boiler according to claim 1, wherein: the waste heat collector (7) comprises a box body (9), a heat exchange tube (10) and spiral heat exchange plates (11), wherein the heat exchange tube (10) is installed in the box body (9) in an S-shaped mode, and the spiral heat exchange plates (11) are arranged on the outer wall of the heat exchange tube (10).
3. The energy-efficient double drum longitudinal boiler according to claim 2, wherein: the box body (9) is composed of a heat insulation board.
4. The energy-efficient double drum longitudinal boiler according to claim 1, wherein: the air outlet end of the boiler barrel (2) positioned at the higher position is provided with a condensed water collecting pipe (13), the condensed water collecting pipe (13) is spirally arranged on an air exhaust pipe (12) of the boiler body (1), and the air exhaust pipe (12) is arranged on an air outlet of the waste heat collector (7).
5. The energy-efficient double drum longitudinal boiler according to claim 1, wherein: the inner wall of the furnace body (1) is provided with a water cooling wall (14), and a water cooling pipe (15) on the water cooling wall (14) gradually decreases along the flame direction of the burner (8).
6. The energy-efficient double drum longitudinal boiler according to claim 5, wherein: the water cooling pipe (15) is communicated with an external water source through a water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322300115.XU CN220582478U (en) | 2023-08-25 | 2023-08-25 | Energy-saving double-drum longitudinal boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322300115.XU CN220582478U (en) | 2023-08-25 | 2023-08-25 | Energy-saving double-drum longitudinal boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220582478U true CN220582478U (en) | 2024-03-12 |
Family
ID=90110021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322300115.XU Active CN220582478U (en) | 2023-08-25 | 2023-08-25 | Energy-saving double-drum longitudinal boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220582478U (en) |
-
2023
- 2023-08-25 CN CN202322300115.XU patent/CN220582478U/en active Active
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