CN210951275U - Structure of horizontal garbage incinerator with three-channel coiled pipe heating surface - Google Patents
Structure of horizontal garbage incinerator with three-channel coiled pipe heating surface Download PDFInfo
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- CN210951275U CN210951275U CN201921206307.1U CN201921206307U CN210951275U CN 210951275 U CN210951275 U CN 210951275U CN 201921206307 U CN201921206307 U CN 201921206307U CN 210951275 U CN210951275 U CN 210951275U
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Abstract
The utility model discloses a horizontal waste incinerator arranges structure that coiled pipe receives hot side at three channels, relate to the mechanical engineering field, easily lead to the problem of damage to superheater import department overtemperature, provide following technical scheme, a horizontal waste incinerator arranges structure that coiled pipe received hot side at three channels, including three channels and horizontal flue, three channels and horizontal flue intercommunication, be equipped with the superheater three channels in the horizontal flue and be equipped with the coiled pipe received hot side, the three channels inner wall is equipped with the soot blower that is used for cleaing away the long-pending ash of coiled pipe received hot side outer wall, reaches the purpose that reduces superheater import department flue gas temperature.
Description
Technical Field
The utility model relates to the field of mechanical engineering, more specifically say that it relates to a horizontal garbage incinerator arranges the structure of coiled pipe heating surface at three channels.
Background
The waste incineration carries out reduction, resource and harmless treatment on urban waste, the waste incineration waste heat boiler utilizes waste heat recovery after the waste incineration to improve the utilization rate of heat released by the waste incineration, boiler waste components, operation and maintenance cost and other reasons are comprehensively considered along with the popularization of the waste incineration power generation technology in China, and the domestic traditional waste incineration boiler adopts a horizontal structure.
In the structure of the traditional middle-temperature and middle-pressure horizontal garbage incinerator (4.0MPa, 400 ℃), in order to guarantee the service life of the superheater, the superheater is usually designed according to the control of the temperature of flue gas at the inlet of the superheater (less than or equal to 600 ℃), and in actual operation, due to the change of fuel parameters, the change of operation conditions and the overload operation condition, the superheater can be overtemperature in the operation process, the service life of the superheater is greatly shortened, and the economic benefit of a boiler is reduced. Particularly, in recent years, along with the rapid development of boilers with large capacity and high parameters, the running conditions of the superheater become worse and worse, and the safe and economic running of the superheater cannot be guaranteed by the traditional structure.
In order to reduce the temperature of the smoke at the inlet of the superheater, a membrane wall and an evaporation screen are usually arranged in a channel, and a screen-type evaporation heating surface in front of the superheater absorbs part of heat, but in actual operation, because the quantity of smoke ash is large and the viscosity is strong after the garbage is incinerated, if the furnace is stopped for manual ash removal at irregular intervals, the heat absorption effect of the evaporation screen is reduced along with the increase of the thickness of the deposited ash; the screen type evaporation heating surface of the horizontal flue is also easy to cause serious dust deposition due to the upper and lower collecting boxes arranged in the flue, and the dust deposition is difficult to effectively remove even a soot blower is used. Along with the increase of the operation time of the boiler, the increase of the dust deposition, the heat absorption of the front-screen evaporation heating surface of the superheater is gradually reduced, the temperature of a flue gas field moves backwards, the temperature of flue gas at the superheater continuously rises, the overtemperature of the superheater is easily caused, and the service life of the superheater pipe and the operation safety of the boiler are influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a horizontal waste incineration exhaust-heat boiler arranges the structure of coiled pipe heating surface at three channels, has the advantage that reduces over heater import department flue gas temperature to the not enough of prior art existence.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a structure of a horizontal garbage incinerator with a coiled pipe heating surface arranged in three channels comprises three channels and a horizontal flue, wherein the three channels are communicated with the horizontal flue, a superheater is arranged in the horizontal flue, the coiled pipe heating surface is arranged in the three channels, and a soot blower for cleaning soot on the outer wall of the coiled pipe heating surface is arranged on the inner wall of the three channels.
By adopting the technical scheme, high-temperature flue gas generated after waste incineration enters the horizontal flue through the three channels, heat energy is transferred to the superheater in the horizontal flue, the contact area of the flue gas and the flue gas in the three channels is increased by the heating surface of the coiled pipe in the three channels, the heat exchange area of the flue gas at the three channels is enlarged, the temperature of the flue gas passing through the three channels is reduced, namely, the temperature of the flue gas at the inlet of the superheater is reduced, the probability of damage of the superheater due to overtemperature is reduced, and the superheater is protected; compared with a heating surface in the vertical or horizontal direction, the flow path of the medium in the heating surface of the coiled pipe is long, the space occupation ratio is small, the heat exchange time of high-temperature flue gas and the medium through the heating surface of the coiled pipe is long, the high-temperature flue gas can be continuously contacted with the heating surface of the coiled pipe, and the cooling speed is accelerated; the soot blower is used for cleaning soot on the surface of the heating surface of the coiled pipe, so that the soot deposition amount on the outer wall of the heating surface of the coiled pipe is reduced, the heating surface of the coiled pipe can effectively work for a long time, the influence on the heat absorption efficiency of the heating surface of the coiled pipe is reduced, the temperature of flue gas reaching the inlet of the superheater is reduced, the probability of over-temperature of the superheater is reduced, and the soot blower plays a role in protecting the superheater.
Preferably, a plurality of heating surfaces of the coiled pipe are arranged in the three channels along the horizontal direction.
By adopting the technical scheme, the contact area of the flue and the heating surface of the coiled pipe in the three channels is increased, so that the temperature of the flue gas passing through the heating surface of the coiled pipe is basically kept consistent, and the cooling rate of the flue gas in the three channels is improved.
Preferably, the heating surface of the serpentine pipe comprises a serpentine pipe and a header communicated with the end part of the serpentine pipe, and the serpentine pipe is arranged to be inclined to the horizontal plane along the length direction of the serpentine pipe.
By adopting the technical scheme, the medium flows into the coiled pipe from the header and continuously absorbs heat energy, and then is collected into the header by the coiled pipe, and the coiled pipe forms a certain included angle with the horizontal plane along the flowing direction of the medium, so that the probability of local overtemperature pipe explosion of the coiled pipe due to gas storage is reduced, and the coiled pipe is protected.
Preferably, the end of the coiled pipe is connected with a butt joint, the coiled pipe is communicated with the header through the butt joint, and the header and the butt joint are both arranged outside the three channels.
By adopting the technical scheme, the coiled pipe is connected with the header through the butt joint, the multi-angle connection of the coiled pipe and the header can be realized through the change of the directions of the two ends of the butt joint, the limitation on the fixed position of the header is reduced, the header and the butt joint are arranged outside the three channels, so that the header and the butt joint are separated from the internal environment of the three channels, the probability of direct contact of the header and the butt joint with flue gas is reduced, the corrosion of the flue gas on the header and the butt joint and the joint of the header and the butt joint is reduced, and the service life of the header and the butt joint is prolonged; the header and the butt joint are arranged outside the three channels, so that the header and the butt joint can be conveniently checked and maintained.
Preferably, the number of the serpentine tubes is set to be plural.
By adopting the technical scheme, the number of the coiled pipes can be increased or decreased according to the needs of actual operation, and the plurality of coiled pipes increase the heat transfer area between the heating surface of the coiled pipes and the flue gas, thereby being beneficial to reasonably utilizing the space in three channels and adapting to different cooling requirements.
Preferably, a descaling shaft is arranged at the bent part in the serpentine pipe, and a scraper is obliquely arranged on the descaling shaft along the axial length direction of the descaling shaft.
Adopt above-mentioned technical scheme, because the medium in the coiled tubing is in the mobile state at the during operation, the medium flows through the surface contact with the scraper blade when the flexion of coiled tubing, because the scraper blade sets up along the long-axis direction slope of scale removal axle, the uneven atress on scraper blade surface makes the medium that flows drive the scraper blade and uses the scale removal axle to rotate as the center this moment, the one end that the scraper blade kept away from the scale removal axle is rotating the in-process and is scraping the dirt that adheres to at the coiled tubing inner wall, thereby clean the coiled tubing inner wall, the dirt of scraping leaves the coiled tubing inside along with the medium flow, make the coiled tubing have self-cleaning effect, reduce the probability that the inner wall scale of.
Preferably, one end of the scraper, which is far away from the descaling shaft, is in contact with the inner wall of the coiled pipe, and a torsion spring is arranged at the joint of the scraper and the descaling shaft.
By adopting the technical scheme, the scraper blade is in contact with the inner wall of the coiled pipe when rotating, and the torsion spring plays a role in buffering when the scraper blade is in contact with the inner wall of the coiled pipe, so that the abrasion of the scraper blade to the inner wall of the coiled pipe in the descaling process is reduced.
Preferably, a plurality of heating surfaces of the coiled pipe are arranged in the three channels along the vertical direction of the three channels.
By adopting the technical scheme, the plurality of heating surfaces of the coiled pipe in the vertical direction form multi-stage heating surfaces in the three channels, and the heating surfaces of the coiled pipe can efficiently absorb heat energy when the smoke temperature is higher so as to adapt to different smoke temperature requirements, thereby expanding the application range of the heating surfaces of the coiled pipe.
To sum up, the utility model discloses following beneficial effect has:
1. by arranging the heating surface of the coiled pipe in the three channels, the temperature of the flue gas reaching the horizontal flue is reduced, and the probability of over-temperature damage of the superheater is reduced;
2. the soot blowers are arranged in the three channels, so that soot deposition on the outer wall of the heating surface of the coiled pipe is reduced, and the heating surface of the coiled pipe can stably absorb heat;
3. the serpentine pipe is obliquely arranged in the three channels along the flowing direction of the medium in the serpentine pipe and the horizontal direction, so that the probability of local over-temperature explosion caused by uneven surface temperature of the serpentine pipe due to steam storage in the serpentine pipe is reduced, and the heating surface of the serpentine pipe is protected.
Drawings
FIG. 1 is a schematic view of the overall structure of the horizontal garbage incinerator with three channels provided with heating surfaces of coiled pipes.
FIG. 2 is a schematic structural view of a horizontal garbage incinerator with three channels on which heating surfaces of serpentine tubes are arranged.
Fig. 3 is an enlarged schematic view of a portion a in fig. 2.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: three channels 1, a horizontal flue 2, a superheater 3, a coiled pipe heating surface 4, a soot blower 5, a coiled pipe 6, a header 7, a butt joint 8, a support plate 9, a descaling shaft 10 and a scraper 11.
A structure of a horizontal waste incineration waste heat boiler with a three-channel coiled pipe heating surface is disclosed, as shown in figures 1 and 2, the horizontal waste incineration waste heat boiler comprises three channels 1 and a horizontal flue 2, the three channels 1 are communicated with the horizontal flue 2, a superheater 3 is arranged in the horizontal flue 2, the coiled pipe heating surface 4 is arranged in the three channels 1, and soot blowers 5 used for removing soot attached to the outer surfaces of the superheater 3 and the coiled pipe heating surface 4 are arranged on the inner walls of the three channels 1.
As shown in fig. 3, a plurality of coiled pipe heating surfaces 4 are arranged in the horizontal direction, each coiled pipe heating surface 4 comprises a plurality of coiled pipes 6, the end portions of the coiled pipes 6 penetrate through the side walls of the three channels 1, the end portions of the coiled pipes 6 are connected with butt joints 8 outside the three channels 1, and one ends, far away from the coiled pipes 6, of the butt joints 8 are connected with headers 7. In order to improve the cooling efficiency of the heating surface 4 of the coiled pipe to the flue gas, a plurality of heating surfaces 4 of the coiled pipe are arranged along the axial length direction of the three channels 1, so that the effect of multi-stage cooling is achieved. In order to enhance the stability of the coiled pipe 6 in the three channels 1, the inner walls of the three channels 1 are welded with supporting plates 9 for supporting the heating surface 4 of the coiled pipe.
The bent part of the coiled pipe 6 in the three channels 1 is a bent end, a descaling shaft 10 is arranged in the bent end of the coiled pipe 6, a limiting part for limiting the descaling shaft 10 to be separated from the bent end is arranged in the bent end of the coiled pipe 6, the limiting part is cylindrical, the end part of the descaling shaft 10 is arranged in the cylindrical limiting part, the surface of the descaling shaft 10 is connected with a scraper 11, the scraper 11 is obliquely arranged along the axial length direction of the descaling shaft 10, when a medium in the coiled pipe 6 flows through the bent end, the medium is in contact with the inclined scraper 11, the surface of the scraper 11 is stressed unevenly and rotates around the descaling shaft 10, the cylindrical limiting piece provides a moving space for the descaling shaft 10 to rotate by taking the axis of the scraper as the shaft, a torsion spring is arranged at the joint of the scraper 11 and the descaling shaft 10, two ends of the torsion spring are respectively connected to the surfaces of the scraper 11 and the descaling shaft 10, a plurality of scrapers 11 are arranged along the periphery of the descaling shaft 10, and one end, far away from the descaling shaft 10, of each scraper 11 is in contact with the inner wall of the coiled pipe 6.
In the process that the flue gas flows from the three channels 1 to the horizontal flue 2, as the contact area of the flue gas and the heating surface 4 of the coiled pipe is larger, the heat exchange efficiency is higher, the temperature of the flue gas is reduced, and the superheater 3 is protected; when the heating surface 4 of the coiled pipe works, a medium flows in the coiled pipe 6, the flowing of the medium drives the scraper 11 to rotate by taking the descaling shaft 10 as an axis, and the scraper 11 scrapes off dirt attached to the bent end of the coiled pipe 6 when rotating, so that the probability of blockage of the coiled pipe 6 is reduced.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A horizontal garbage incinerator arranges the structure of the heating surface of the coiled pipe in the three channel, including three channel and horizontal flue, the said three channel communicates with said horizontal flue, the said horizontal flue is equipped with the superheater, characterized by that: a heating surface of a coiled pipe is arranged in the three channels, and soot blowers used for removing soot on the outer wall of the heating surface of the coiled pipe are arranged on the inner wall of the three channels.
2. The horizontal garbage incinerator of claim 1, wherein said serpentine heating surface is formed by three channels, said serpentine heating surface being formed by: the heating surfaces of the coiled pipe are arranged in the three channels along the horizontal direction.
3. The structure of the horizontal garbage incinerator according to claim 2, wherein the heating surfaces of the serpentine tubes are arranged in three channels, and the structure is characterized in that: the heating surface of the coiled pipe comprises a coiled pipe and a header communicated with the end part of the coiled pipe, and the coiled pipe is inclined to the horizontal plane along the length direction of the coiled pipe.
4. The structure of the horizontal garbage incinerator according to claim 3, wherein said serpentine heating surface is formed by three channels, said serpentine heating surface being formed by: the end part of the coiled pipe is connected with a butt joint, the coiled pipe is communicated with the header through the butt joint, and the header and the butt joint are both arranged outside the three channels.
5. The structure of the horizontal garbage incinerator according to claim 3, wherein said serpentine heating surface is formed by three channels, said serpentine heating surface being formed by: the number of the serpentine tubes is set to be a plurality.
6. The structure of the horizontal garbage incinerator according to claim 3, wherein said serpentine heating surface is formed by three channels, said serpentine heating surface being formed by: and a descaling shaft is arranged at the bent part in the serpentine pipe, and a scraper is obliquely arranged on the descaling shaft along the axial length direction of the descaling shaft.
7. The structure of the horizontal garbage incinerator as claimed in claim 6, wherein said serpentine heating surface is formed by three channels, and wherein: one end of the scraper far away from the descaling shaft is in contact with the inner wall of the coiled pipe, and a torsional spring is arranged at the joint of the scraper and the descaling shaft.
8. The horizontal garbage incinerator of claim 1, wherein said serpentine heating surface is formed by three channels, said serpentine heating surface being formed by: and a plurality of heating surfaces of the coiled pipe are arranged in the three channels along the vertical direction of the three channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921206307.1U CN210951275U (en) | 2019-07-26 | 2019-07-26 | Structure of horizontal garbage incinerator with three-channel coiled pipe heating surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921206307.1U CN210951275U (en) | 2019-07-26 | 2019-07-26 | Structure of horizontal garbage incinerator with three-channel coiled pipe heating surface |
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| CN210951275U true CN210951275U (en) | 2020-07-07 |
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| CN201921206307.1U Active CN210951275U (en) | 2019-07-26 | 2019-07-26 | Structure of horizontal garbage incinerator with three-channel coiled pipe heating surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113124394A (en) * | 2021-04-06 | 2021-07-16 | 苏州西热节能环保技术有限公司 | Method for adjusting flue gas temperature of superheater inlet flue of waste heat boiler |
-
2019
- 2019-07-26 CN CN201921206307.1U patent/CN210951275U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113124394A (en) * | 2021-04-06 | 2021-07-16 | 苏州西热节能环保技术有限公司 | Method for adjusting flue gas temperature of superheater inlet flue of waste heat boiler |
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