CN212719811U - Boiler heat exchange equipment and urea pyrolysis system - Google Patents
Boiler heat exchange equipment and urea pyrolysis system Download PDFInfo
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- CN212719811U CN212719811U CN202020554757.6U CN202020554757U CN212719811U CN 212719811 U CN212719811 U CN 212719811U CN 202020554757 U CN202020554757 U CN 202020554757U CN 212719811 U CN212719811 U CN 212719811U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model relates to a boiler heat transfer equipment technical field especially relates to boiler heat transfer equipment and urea pyrolysis system. A boiler heat exchange apparatus comprising: a plurality of heat exchanger modules vertically arranged in the front well area; each heat exchanger module comprises an air inlet header and an air outlet header, the air inlet header and the air outlet header are fixed outside a ceiling of the boiler, the air inlet header and the air outlet header are connected through a heat exchange tube panel, and a heat exchange tube penetrates through a through hole of the ceiling and extends into the boiler; the air inlet header tanks of the plurality of heat exchanger modules are connected with each other, and the air outlet header tanks of the plurality of heat exchanger modules are connected with each other; one of the air inlet header tanks is provided with an air inlet, and one of the air outlet header tanks is provided with an air outlet. The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the method improves the heat exchange efficiency, saves energy, reduces the layout area of the heat exchanger, reduces the system investment, and is suitable for the full pyrolysis of the urea solution in the full load range of the boiler.
Description
Technical Field
The utility model relates to a boiler heat transfer equipment technical field especially relates to boiler heat transfer equipment and urea pyrolysis system.
Background
Because denitration liquid ammonia, ammonia water and the like are major hazard sources, the reductant ammonia gas for denitration of the power plant is prepared by adopting urea more. The urea pyrolysis adopts boiler flue gas as a heat source heat exchanger, so that energy is saved, energy consumption is reduced, and operation cost is reduced.
The power plant usually adopts to set up the shell and tube heat exchanger that the structural style is horizontal arrangement outside the boiler to the heat exchanger setting, draws out the air that the flue gas flows into in the heat exchanger tube heating tube bank from the boiler, realizes the heating to the gas of introducing, and simultaneously, the flue gas flows into the heat exchanger pipe and leads to heat exchanger deposition, jam and influence the air heating. Or the heat exchanger is arranged near the position where the boiler flue gas circulates, so that the problem that the flue gas enters the inside of the heat exchanger tube to cause dust accumulation and blockage to influence air heating is avoided. But the different heat exchange efficiency of the position of setting also can be different, and this problem often can be neglected when setting up the heat exchanger pipe to lead to heat exchange efficiency to descend, the energy is extravagant, can not reduce the running cost effectively, the not abundant scheduling problem of pyrolysis.
SUMMERY OF THE UTILITY MODEL
To overcome the problems in the related art, the present disclosure provides a boiler heat exchange device and a urea pyrolysis system.
According to an aspect of the disclosed embodiments, there is provided a boiler heat exchange device, including: the heat exchanger modules are vertically arranged in a front smoke well area of the boiler, close to the boiler, of the boiler steering chamber; each heat exchanger module comprises an air inlet header and an air outlet header, the air inlet header and the air outlet header are fixed outside a ceiling of the boiler, the air inlet header and the air outlet header are connected through a heat exchange tube panel formed by at least two heat exchange tubes, and the heat exchange tube panel penetrates through a through hole of the ceiling and extends into the boiler; the inlet headers of the heat exchanger modules are connected to each other, and the outlet headers of the heat exchanger modules are connected to each other; an air inlet is arranged on the air inlet header of one of the heat exchanger modules, and an air outlet is arranged on the air outlet header of one of the heat exchanger modules.
In one embodiment, the inlet header and the outlet header are connected by a plurality of heat exchange tube panels; the heat exchange tube panels are arranged at intervals of a first designated distance.
In one embodiment, the inlet headers of the adjacent heat exchanger modules are connected through an expansion joint, and the outlet headers of the adjacent heat exchanger modules are connected through an expansion joint.
In one embodiment, the heat exchange tube is U-shaped, and two ends of the U-shaped heat exchange tube are respectively connected with the air inlet header and the air outlet header through connecting tubes; the two connecting pipes are arc-shaped and protrude in opposite directions. In one embodiment, the flue gas upstream surface of the heat exchange tube panel is provided with an anti-abrasion tile.
In one embodiment, the heat exchanger tube panels are secured by one or more clamps that are spaced a second specified distance apart on each of the heat exchangers.
In one embodiment, the first specified distance is an integer multiple of a waterwall tube pitch of the boiler ceiling.
In one embodiment, the plurality of heat exchangers are symmetrical with respect to a center line of the boiler and are uniformly arranged along a length direction of the inlet header and the outlet header.
In one embodiment, the through hole and the heat exchange tube panel are sealed through a sealing element, and an insulating layer is arranged outside the ceiling of the heat exchange tube panel.
According to another aspect of embodiments of the present disclosure, there is provided a urea pyrolysis system, including: the boiler heat exchange equipment is the boiler heat exchange equipment on one aspect or any one aspect on the other aspect; the air inlet equipment is connected with the air inlet through an air inlet pipeline; and the pyrolysis furnace is connected with the gas outlet through a gas outlet pipeline and is communicated with the urea solution container.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the heat exchange efficiency is improved, the energy is saved, the heat exchanger layout area is reduced, the system investment is reduced, and the method is suitable for full pyrolysis of the urea solution in the full load range of the boiler.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a perspective view illustrating a boiler heat exchange apparatus according to an exemplary embodiment of the present disclosure.
FIG. 2 is a front view illustrating a boiler heat exchange apparatus according to an exemplary embodiment of the present disclosure.
Fig. 3 is a partial schematic view illustrating a heat exchange pipe according to an exemplary embodiment of the present disclosure.
FIG. 4 is a schematic diagram illustrating an arrangement of a boiler heat exchange device according to an exemplary embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
According to an aspect of an embodiment of the present disclosure, as shown in fig. 1 and 2, there is provided a boiler heat exchange apparatus including: the heat exchanger modules are vertically arranged in a front smoke well area of the boiler, close to the boiler, of the boiler steering chamber; each heat exchanger module comprises an air inlet header 2 and an air outlet header 5, the air inlet header 2 and the air outlet header 5 are fixed outside a ceiling 9 of the boiler, the air inlet header 2 and the air outlet header 5 are connected through a heat exchange tube panel 3 formed by at least two heat exchange tubes 31, and the heat exchange tube panel 3 penetrates through a through hole of the ceiling 9 and extends into the boiler; the inlet headers 2 of a plurality of the heat exchanger modules are connected to each other, and the outlet headers 5 of a plurality of the heat exchanger modules are connected to each other; an air inlet 1 is arranged on the air inlet header 2 of one of the heat exchanger modules, and an air outlet is arranged on the air outlet header 6 of one of the heat exchanger modules.
The modular design of the boiler heat exchange equipment is formed by connecting a plurality of identical heat exchanger modules, the heat exchange area is enlarged, the vertical arrangement of a front smoke well area close to a boiler solves the problem that smoke enters a heat exchanger, causes dust deposition and blockage in the heat exchanger and influences heat exchange, optimizes the smoke flow field and the smoke temperature of the smoke entering the gas-gas heat exchanger, and achieves the purpose of improving the efficiency of the heat exchanger. Through the boiler heat exchange equipment, the heat exchange efficiency is improved, the energy is saved, the operation cost is improved, and the full pyrolysis can be carried out.
In one embodiment, the inlet header 2 and the outlet header 5 are connected by a plurality of heat exchange tube panels 3; a plurality of the heat exchange tube panels 3 are arranged at a first designated distance.
In one embodiment, the adjacent inlet headers 2 are connected by an expansion joint 8, and the adjacent outlet headers 5 are connected by an expansion joint 8.
In one embodiment, the heat exchange pipe 31 is U-shaped, and two ends of the U-shape of the heat exchange pipe 31 are respectively connected with the inlet header 2 and the outlet header 5 through connecting pipes 32; the two connection pipes 32 are arc-shaped and protrude in opposite directions.
According to the boiler structure, the distance between the opposite two tubes of the U-shaped heat exchange tube 31 is reduced as much as possible, and the distance between the inlet header 2 and the outlet header 5 is increased as much as possible, in order to prevent heat loss of the hot air discharged from the outlet header. And, the air inlet header 2 and the air outlet header 5 are both made of pipelines with the pipe diameter larger than that of the heat exchange pipe 31, the air inlet header 2 and the air outlet header 5 are arranged in parallel, and the distance between the air inlet header 2 and the air outlet header 5 is larger than that between two pipelines of the heat exchange pipe 31. Therefore, the two tubes of the heat exchange tube 31 are connected to the inlet header 2 and the outlet header 5, respectively, by two connection tubes 32 protruding in opposite directions.
In one embodiment, as shown in fig. 3, an abrasion-proof tile 4 is arranged on the flue gas incident flow surface of the heat exchange tube panel 3.
The vertical setting of heat exchanger is being close to the boiler and turns to the preceding cigarette wellsite of room, and it is great to the washing away of heat exchanger toward stove rear direction flue gas from the stokehold, sets up wear-resisting scour prevention that wear-resisting tile 4 can strengthen heat exchange tube panel 3, improves the life of heat exchanger.
In one embodiment, the heat exchanger tube panels 3 are fixed by more than one clamp 7, and the clamps 7 are arranged on each heat exchanger at a second designated distance.
U type heat exchange tube panel 3 comprises one and becomes U type heat exchange tube panel by 7 fixed connection of specially designed anchor clamps to prevent rocking of heat exchange tube panel.
In one embodiment, the first specified distance is an integer multiple of the waterwall tube spacing of the boiler ceiling 9.
In one embodiment, as shown in fig. 4, the plurality of heat exchangers are symmetrical with respect to the center line of the boiler and are uniformly arranged along the length direction of the inlet header 2 and the outlet header 5.
In one embodiment, the space between the through hole and the heat exchange tube panel 3 is sealed by a sealing element, and an insulating layer is arranged outside the heat exchange tube panel on the ceiling.
Through the sealed outside that has reduced the flue gas and has gived off the boiler through the through-hole of sealing member, avoid smoke pollution, set up the temperature that the heat preservation maintains the gas of heat exchange tube panel 3 in the outside part of boiler.
The heat exchanger is formed by connecting an air inlet header 2, a plurality of heat exchange tube panels 3 and an air outlet header 5 in sequence, a plurality of heat exchangers are connected with one another to form boiler heat exchange equipment, and a first specified distance is arranged between every two adjacent heat exchangers. The first specified distance is an integral multiple of a water wall pipe of the boiler ceiling, the heat exchange area is enlarged, the heat exchange efficiency is improved, and the plurality of heat exchanger modules are symmetrically arranged relative to the central line of the boiler, so that the heat exchanger modules are uniformly heated, and the temperature of each heat exchanger module is equal. Each air inlet header 2 of a plurality of heat exchanger modules is connected through an expansion joint 8, each air outlet header 5 of the plurality of heat exchanger modules is connected through the expansion joint 8, the connection between the air inlet headers 2 and the connection between the air outlet headers 5 can be connected through a common pipeline, a connecting pipe joint or a flange and the like, but the axial deformation compensation effect can be effectively achieved through the expansion joint connection.
Set up air inlet 1 on the collection case 2 that admits air of one of them heat exchanger module of a plurality of heat exchanger modules, set up gas outlet 6 on the collection case 5 that gives vent to anger of one of them heat exchanger of a plurality of heat exchanger modules, introduce air conditioning through air inlet 1, become steam and pass through the gas outlet output after the high temperature flue gas heating of boiler, realized cold and hot gaseous transformation process.
The boiler heat exchange equipment formed as above is fixed by a boiler ceiling 9 steel structure and is suspended at the position of a boiler steering chamber, the boiler heat exchange equipment is vertically arranged close to a front smoke well area of the boiler, smoke does not enter a heat exchanger, the vertical direction projection area of the heat exchanger is small, and the problem that the smoke is deposited inside and outside the heat exchanger, so that the heat exchanger is ash-deposited and blocked to influence air heating is solved. The flue gas temperature at the arrangement position is high, the contact area with the heat exchanger is large and sufficient, the flue gas flow field and the temperature field are optimized, and the purpose of improving the efficiency of the heat exchanger is achieved.
According to another aspect of embodiments of the present disclosure, there is provided a boiler pyrolysis system, including: the boiler heat exchange equipment is the boiler heat exchange equipment on one aspect or any one aspect on the other aspect; the air inlet equipment is connected with the air inlet through an air inlet pipeline; and the pyrolysis furnace is connected with the gas outlet through a gas outlet pipeline and is communicated with the urea solution container.
Wherein air inlet equipment passes through the boiler primary air and introduces air inlet 1 through the fan, in order to guarantee the heat transfer effect, avoids from 6 exhaust high-temperature gas in gas outlet can not reach required pyrolysis temperature, sets up the pipeline that introduces high-temperature flue gas from the boiler between boiler and air inlet 1 for adjust the temperature of the air conditioning of inputing the air inlet. The pipeline is provided with an adjusting device for adjusting the air input of the high-temperature flue gas and stopping inputting the high-temperature flue gas when the temperature of the cold air is not required to be adjusted. In order to avoid the dust deposition of the flue gas in the system, a filter is arranged on the pipeline to filter the smoke dust.
The cold air is conveyed to an air inlet 1 of an air inlet header 2 through a primary fan or a blower of the boiler, then enters the air inlet header 2, and then enters a U-shaped heat exchange tube panel consisting of more than two heat exchange tubes 3 after being distributed and passing through rear flue header tube fins of a ceiling 9 of the boiler. The diluting air for pyrolysis entering the U-shaped heat exchange tube panel is heated to the required temperature by smoke in the tube ring, then enters the outlet header 5 through the fins of the rear flue ceiling tube passing through the inlet 9, and is conveyed to the urea pyrolysis furnace through the outlet header connector 6 and a pipeline connected by the expansion joint.
The pyrolysis furnace is communicated with the urea solution container, and the urea solution is introduced into the pyrolysis furnace to be mixed with the high-temperature gas, so that the pyrolysis of the urea solution is realized. In order to avoid that the urea solution is not sufficiently pyrolyzed, the urea solution is introduced into the pyrolysis furnace in the form of a spray.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.
Claims (10)
1. A boiler heat exchange apparatus, comprising:
the heat exchanger modules are vertically arranged in a front smoke well area of the boiler, close to the boiler, of the boiler steering chamber;
each heat exchanger module comprises an air inlet header and an air outlet header, the air inlet header and the air outlet header are fixed outside a ceiling of the boiler, the air inlet header and the air outlet header are connected through a heat exchange tube panel formed by at least two heat exchange tubes, and the heat exchange tube panel penetrates through a through hole of the ceiling and extends into the boiler;
the inlet headers of the heat exchanger modules are connected to each other, and the outlet headers of the heat exchanger modules are connected to each other;
an air inlet is arranged on the air inlet header of one of the heat exchanger modules, and an air outlet is arranged on the air outlet header of one of the heat exchanger modules.
2. The boiler heat exchange device of claim 1,
the air inlet header and the air outlet header are connected through a plurality of heat exchange tube panels;
the heat exchange tube panels are arranged at intervals of a first designated distance.
3. The boiler heat exchange device of claim 2,
the adjacent air inlet header tanks are connected through expansion joints, and the adjacent air outlet header tanks are connected through expansion joints.
4. The boiler heat exchange device of claim 1,
the heat exchange tube is U-shaped, and two ends of the U-shaped heat exchange tube are respectively connected with the air inlet collecting box and the air outlet collecting box through connecting tubes;
the two connecting pipes are arc-shaped and protrude in opposite directions.
5. The boiler heat exchange device of claim 4,
and the smoke gas incident surface of the heat exchange tube panel is provided with an anti-abrasion tile.
6. The boiler heat exchange device of claim 5,
the heat exchange tube panels are fixed through more than one clamp, and the clamps are arranged on each heat exchanger at intervals of a second specified distance.
7. The boiler heat exchange device of claim 2,
the first designated distance is integral multiple of the space between the water wall tubes of the boiler ceiling.
8. The boiler heat exchange device of claim 1,
the plurality of heat exchanger modules are symmetrical with respect to a center line of the boiler and are uniformly arranged in a length direction of the inlet header and the outlet header.
9. The boiler heat exchange device of claim 1,
the heat exchange tube panel is arranged on the outer portion of the ceiling and is provided with a heat insulation layer.
10. A urea pyrolysis system, comprising:
boiler heat exchange equipment according to any one of claims 1 to 9;
the air inlet equipment is connected with the air inlet through an air inlet pipeline;
and the pyrolysis furnace is connected with the gas outlet through a gas outlet pipeline and is communicated with the urea solution container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020554757.6U CN212719811U (en) | 2020-04-15 | 2020-04-15 | Boiler heat exchange equipment and urea pyrolysis system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020554757.6U CN212719811U (en) | 2020-04-15 | 2020-04-15 | Boiler heat exchange equipment and urea pyrolysis system |
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| Publication Number | Publication Date |
|---|---|
| CN212719811U true CN212719811U (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020554757.6U Active CN212719811U (en) | 2020-04-15 | 2020-04-15 | Boiler heat exchange equipment and urea pyrolysis system |
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| CN (1) | CN212719811U (en) |
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2020
- 2020-04-15 CN CN202020554757.6U patent/CN212719811U/en active Active
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