CN215260571U - Pulverized coal hot water boiler - Google Patents
Pulverized coal hot water boiler Download PDFInfo
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- CN215260571U CN215260571U CN202120206930.8U CN202120206930U CN215260571U CN 215260571 U CN215260571 U CN 215260571U CN 202120206930 U CN202120206930 U CN 202120206930U CN 215260571 U CN215260571 U CN 215260571U
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- flue gas
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model provides a pulverized coal hot water boiler, including boiler body and flue, the flue gas that the flue discharge boiler body produced, the flue is provided with high temperature air heater, dust remover and low temperature air heater, the flue gas in the flue flows through high temperature air heater, dust remover and low temperature air heater in proper order, low temperature heater includes flue gas channel and air passage, low temperature gas in the air passage accomplishes the heat exchange with the high temperature flue gas in the flue gas channel and emits into boiler body after. This scheme is in the actual work in-process, and the flue gas flows through high temperature air heater, dust remover and low temperature air heater in proper order, and the dust remover is before low temperature air heater, consequently, and the flue gas temperature that gets into in the dust remover descends unobviously, has optimized the dust collection efficiency of dust remover, has improved the utilization ratio of flue gas waste heat.
Description
Technical Field
The present disclosure relates to boiler technology, and more particularly to a pulverized coal hot water boiler.
Background
The traditional industrial coal-fired boiler mainly adopts a grate firing boiler, and has the defects of low combustion efficiency, serious pollution and difficulty in meeting the requirements of energy conservation, emission reduction and pollutant emission. The pulverized coal combustion is one of the high-efficiency clean combustion modes of fuel, the combustion efficiency can reach more than 98 percent, and the pulverized coal combustion method is a mature combustion technology and is generally applied to large-scale power station boilers. In recent years, pulverized coal combustion has also been applied to industrial boilers.
In order to improve the thermal efficiency of the boiler, a high-temperature air preheater and a low-temperature air preheater are generally provided in the tail flue. The cold side channels of the high-temperature air preheater and the low-temperature air preheater are used for heating air and blowing the air into the hearth through the burner in a secondary air mode, and the flue gas coming out of the hearth is cooled after being subjected to heat exchange with the air in the hot side channel, so that the waste heat of the flue gas is effectively utilized. And the rear end of the low-temperature air preheater is connected with a bag-type dust collector to remove solid particles in the flue gas.
Boiler structure among the prior art sets up unreasonablely, has flue gas dust removal effect poor and waste heat recovery efficiency low technical problem
SUMMERY OF THE UTILITY MODEL
The utility model provides a pulverized coal hot water boiler has solved the poor technical problem of flue gas dust removal effect among the prior art.
Some embodiments adopted to solve the above technical problems include:
the utility model provides a pulverized coal hot water boiler, includes boiler body and flue, the flue discharges the flue gas that boiler body produced, the flue is provided with high temperature air heater, dust remover and low temperature air heater, and flue gas in the flue flows through in proper order high temperature air heater the dust remover and low temperature air heater, low temperature heater includes flue gas channel and air passage, low temperature gas in the air passage with arrange into after the heat exchange is accomplished to high temperature flue gas in the flue gas channel boiler body.
According to the scheme, in the actual working process, the flue gas sequentially flows through the high-temperature air preheater, the dust remover and the low-temperature air preheater, and the dust remover is arranged in front of the low-temperature air preheater, so that the temperature of the flue gas entering the dust remover is not obviously reduced, and the dust removal efficiency of the dust remover is optimized. In addition, the flue gas enters the low-temperature air preheater after being dedusted, and the flue gas can effectively complete heat exchange in the low-temperature air preheater without considering dedusting performance, so that the flue gas waste heat is utilized more, and the application performance of the pulverized coal hot water boiler is optimized.
Preferably, the low-temperature air preheater comprises an inner cylinder and an outer cylinder, wherein the inner cylinder is provided with the smoke channel, the outer cylinder is sleeved outside the inner cylinder, the inner cylinder and the outer cylinder are coaxially arranged, an air channel is formed between the inner cylinder and the outer cylinder, and the smoke channel is communicated with the flue.
In this scheme, low temperature air heater has better preheating performance. The heat of the flue gas is not easy to lose.
Preferably, the inner cylinder is provided with a smoke turbulence sheet and an air turbulence sheet, the smoke turbulence sheet extends into the smoke channel, and the air turbulence sheet extends into the air channel.
In the scheme, the arrangement of the flue gas turbulence sheet and the air turbulence sheet reduces the flow velocity of flue gas and gas, and improves the utilization rate of flue gas waste heat.
Preferably, the air turbulence piece is of a hollow structure and comprises an opening, and the opening is communicated with the smoke channel.
Preferably, the air turbulence sheet is obliquely arranged along the smoke flowing direction in the smoke channel, so that a part of high-temperature smoke in the smoke channel enters the air turbulence sheet.
This scheme has increased the heat transfer area of gas in the air passage and flue gas in the flue gas passageway, has improved the waste heat utilization efficiency of flue gas.
Preferably, the flue gas turbulence sheet is of a hollow structure, and is provided with a mouth part which is communicated with the air channel.
Preferably, the flue gas turbulence sheet is obliquely arranged along the gas flow direction in the air channel, so that a part of the gas in the air channel enters the flue gas turbulence sheet.
This scheme has further increased the heat exchange area of gas in the air passage and flue gas in the flue gas passageway, has improved flue gas waste heat utilization ratio.
Preferably, the outer cylinder includes a first portion and a second portion, the second portion and the inner cylinder are of an integral structure, the first portion is fixed to the second portion by a screw, and a seal ring is provided between the first portion and the second portion.
In this scheme, the urceolus includes first portion and second part, and low temperature air heater easily processes, has reduced low temperature air heater's manufacturing cost.
Preferably, the first part is provided with a nozzle, the nozzle is communicated with the air channel, the nozzle is provided with a flange sheet, the flange sheet and the nozzle are of an integral structure, and the nozzle and the first part are of an integral structure.
In this scheme, low temperature air heater easily with other pipe connection, optimized low temperature air heater's performance.
Compared with the prior art, the pulverized coal hot water boiler provided by the disclosure has the following advantages:
1. the flue gas flows through the high-temperature air preheater, the dust remover and the low-temperature air preheater in sequence, the flue gas still has higher temperature in the dust remover, impurities in the flue gas are not easy to condense, and the dust removal efficiency of the dust remover is improved. In addition, the flue gas enters the low-temperature air preheater after being dedusted, and the flue gas can be cooled to a lower temperature in the low-temperature air preheater, so that the utilization rate of the flue gas waste heat is improved.
2. The low-temperature air preheater comprises an inner barrel and an outer barrel, and the outer barrel wraps part of the inner barrel, so that the utilization rate of the flue gas waste heat is greatly improved. The gas and the flue gas have larger heat exchange area, and the flue gas heat in the flue gas channel is not easy to dissipate, thereby improving the utilization rate of the flue gas waste heat.
Drawings
For purposes of explanation, several embodiments of the disclosed technology are set forth in the following figures. The following drawings are incorporated herein and constitute a part of the detailed description. In some instances, well-known structures and components are shown in block diagram form in order to avoid obscuring the concepts of the disclosed subject technology.
Fig. 1 is a working schematic diagram of the present disclosure.
FIG. 2 is a schematic diagram of a low temperature air preheater.
FIG. 3 is a schematic view of a first orientation of the internal structure of a low temperature air preheater.
FIG. 4 is a schematic view of a second orientation of the internal structure of the low temperature air preheater.
In the figure, 1, a boiler body, 2, a flue, 3, a high-temperature air preheater, 4, a dust remover, 5, a low-temperature air preheater, 51, a flue gas channel, 52, an air channel, 53, an inner cylinder, 54, an outer cylinder, 531, a flue gas turbulence sheet, 532, an air turbulence sheet, 541, a first part, 542, a second part, 543, a sealing ring, 545, a nozzle, 546 and a flange sheet. .
Detailed Description
The specific embodiments illustrated below are intended as descriptions of various configurations of the presently disclosed subject technology and are not intended to represent the only configurations in which the presently disclosed subject technology may be practiced. Specific embodiments include specific details for the purpose of providing a thorough understanding of the presently disclosed subject matter technology. It will be apparent, however, to one skilled in the art that the disclosed subject matter technology is not limited to the specific details shown herein and may be practiced without these specific details.
Referring to fig. 1, fig. 2, fig. 3, fig. 4 show, a pulverized coal hot water boiler, including boiler body 1 and flue 2, flue 2 discharges the flue gas that boiler body 1 produced, flue 2 is provided with high temperature air heater 3, dust remover 4 and low temperature air heater 5, and the flue gas in the flue 2 flows through in proper order high temperature air heater 3 dust remover 4 and low temperature air heater 5, low temperature heater includes flue gas passageway 51 and air channel 52, low temperature gas in the air channel 52 with discharge into after the heat exchange is accomplished to high temperature flue gas in the flue gas passageway 51 boiler body 1.
In practice, the dust collector 4 may be a bag type dust collector 4 or other dust collectors 4 having dust collecting ability and applied to boilers. The specific specification and structure of the dust collector 4 are not limited, and may need to be selected appropriately.
The structure and specification of the boiler body 1 can be reasonably selected according to the needs, and the dust removing capacity of the dust remover 4 is matched with the flue gas generated by the boiler, so that the dust remover 4 can effectively treat the flue gas exhausted by the boiler.
The high temperature air preheater 3 may be of a conventional construction as known in the art.
In practice, although the flue gas discharged from the high-temperature air preheater 3 is subjected to primary heat exchange, the flue gas still has higher temperature, at the moment, impurities in the flue gas are easily removed by the dust remover 4, and the flue gas after dust removal by the dust remover 4 is treated by the low-temperature air preheater 5, so that the flue gas discharged from the low-temperature air preheater 5 has lower temperature, and the utilization rate of the flue gas waste heat is improved as much as possible. Therefore, the low temperature air preheater 5 can adopt a structure having a better heat exchange capacity.
In some embodiments, the low-temperature air preheater 5 includes an inner cylinder 53 having an inner cavity forming the flue gas channel 51, and an outer cylinder 54 sleeved outside the inner cylinder 53, the inner cylinder 53 and the outer cylinder 54 are coaxially disposed, an air channel 52 is formed between the inner cylinder 53 and the outer cylinder 54, and the flue gas channel 51 is communicated with the flue 2.
The inner cylinder 53 is provided with a smoke turbulence sheet 531 and an air turbulence sheet 532, the smoke turbulence sheet 531 extends into the smoke channel 51, and the air turbulence sheet 532 extends into the air channel 52. The flue gas turbulence piece 531 and the air turbulence piece 532 can be integrated with the inner cylinder 53, and the inner cylinder 53 and a part of the outer cylinder 54 can be molded by casting. The shape of the flue gas turbulence piece 531 and the air turbulence piece 532 may be a three-dimensional curved surface to increase the heat exchange area.
The air turbulence plate 532 is a hollow structure, and the air turbulence plate 532 comprises an opening which is communicated with the smoke channel 51. The air turbulence plates 532 are obliquely arranged along the smoke flowing direction in the smoke channel 51, so that a part of the high-temperature smoke in the smoke channel 51 enters the air turbulence plates 532.
The flue gas turbulence sheet 531 is a hollow structure, and the flue gas turbulence sheet 531 has a mouth part which is communicated with the air channel 52. The flue gas turbulence pieces 531 are arranged obliquely in the gas flow direction in the air passage 52, so that a part of the gas in the air passage 52 enters the flue gas turbulence pieces 531.
The flue gas turbulence sheet 531 is obliquely arranged along the gas flow direction in the air passage 52, that is, the flue gas turbulence sheet 531 and the inner cylinder 53 are of an integral structure and protrude out of the inner cylinder 53, and the direction of the protruding flue gas turbulence sheet 531 out of the inner cylinder 53 extends along the flow direction of the gas in the air passage 52. The arrangement of the air turbulence plates 532 refers to the arrangement of the flue gas turbulence plates 531.
In some embodiments, the outer cylinder 54 includes a first portion 541 and a second portion 542, the second portion 542 and the inner cylinder 53 are integrally formed, the first portion 541 is fixed to the second portion 542 by a screw, and a sealing ring 543 is disposed between the first portion 541 and the second portion 542.
The first portion 541 is provided with a nozzle 545, the nozzle 545 is communicated with the air passage 52, the nozzle 545 is provided with a flange 546, the flange 546 and the nozzle 545 are of an integral structure, and the nozzle 545 and the first portion 541 are of an integral structure.
Since the inner cylinder 53 has a complicated structure/characteristic and a certain sealing characteristic is required between the inner cylinder 53 and the outer cylinder 54, the second portion 542 and the inner cylinder 53 are integrally formed by casting, which facilitates the manufacture of the low-temperature air preheater 5 and reduces the manufacturing cost of the low-temperature air preheater 5.
In the present disclosure, the outer cylinder 54 is sleeved on the inner cylinder 53, so that heat in the inner cylinder 53 and the flue gas can only radiate to the outer cylinder 54, and the air channel 52 between the outer cylinder 54 and the inner cylinder 53 can effectively complete heat exchange with the flue gas, thereby improving the recovery and utilization rate of the flue gas waste heat.
While the subject matter of the present disclosure and its corresponding details have been described above, it is to be understood that the above description is only illustrative of some embodiments of the subject matter of the present disclosure and that some of the details may be omitted from the detailed description.
In addition, in some of the embodiments disclosed above, there is a possibility that a plurality of embodiments may be combined and implemented, and various combinations are not listed at length. The implementation embodiments can be freely combined according to the requirements when the technical personnel in the field carry out the implementation so as to obtain better application experience.
Other configurations of details or figures may be derived by those skilled in the art in practicing the presently disclosed subject matter, as well as figures, and it will be apparent that such details are within the scope of the presently disclosed subject matter and are covered by the presently disclosed subject matter without departing from the presently disclosed subject matter.
Claims (9)
1. The utility model provides a buggy boiler, includes boiler body (1) and flue (2), flue (2) discharge the flue gas that boiler body (1) produced, its characterized in that: flue (2) are provided with high temperature air heater (3), dust remover (4) and low temperature air heater (5), and the flue gas in flue (2) flows through in proper order high temperature air heater (3) dust remover (4) and low temperature air heater (5), low temperature air heater includes flue gas passageway (51) and air duct (52), low temperature gas in air duct (52) with arrange into after the heat exchange is accomplished to high temperature flue gas in flue gas passageway (51) boiler body (1).
2. The pulverized coal-fired hot water boiler according to claim 1, characterized in that: the low-temperature air preheater (5) comprises an inner cylinder (53) with an inner cavity forming a flue gas channel (51) and an outer cylinder (54) sleeved outside the inner cylinder (53), the inner cylinder (53) and the outer cylinder (54) are coaxially arranged, an air channel (52) is formed between the inner cylinder (53) and the outer cylinder (54), and the flue gas channel (51) is communicated with the flue (2).
3. The pulverized coal-fired hot water boiler according to claim 2, characterized in that: the inner barrel (53) is provided with a smoke turbulence sheet (531) and an air turbulence sheet (532), the smoke turbulence sheet (531) extends into the smoke channel (51), and the air turbulence sheet (532) extends into the air channel (52).
4. The pulverized coal-fired hot water boiler according to claim 3, characterized in that: the air turbulence sheet (532) is of a hollow structure, and the air turbulence sheet (532) comprises an opening which is communicated with the smoke channel (51).
5. The pulverized coal hot water boiler according to claim 4, characterized in that: the air turbulence sheet (532) is obliquely arranged along the smoke flowing direction in the smoke channel (51), so that part of high-temperature smoke in the smoke channel (51) enters the air turbulence sheet (532).
6. The pulverized coal-fired hot water boiler according to claim 3, characterized in that: the smoke turbulence sheet (531) is of a hollow structure, the smoke turbulence sheet (531) is provided with a mouth part, and the mouth part is communicated with the air channel (52).
7. The pulverized coal hot water boiler according to claim 6, characterized in that: the smoke turbulence sheet (531) is obliquely arranged along the gas flow direction in the air channel (52), so that a part of the gas in the air channel (52) enters the smoke turbulence sheet (531).
8. The pulverized coal-fired hot water boiler according to claim 2, characterized in that: the outer tube (54) includes a first portion (541) and a second portion (542), the second portion (542) and the inner tube (53) are configured as an integral structure, the first portion (541) is fixed to the second portion (542) by a screw, and a seal ring (543) is provided between the first portion (541) and the second portion (542).
9. The pulverized coal-fired hot water boiler according to claim 8, characterized in that: the first portion (541) is provided with a nozzle (545), the nozzle (545) is communicated with the air channel (52), the nozzle (545) is provided with a flange sheet (546), the flange sheet (546) and the nozzle (545) are of an integral structure, and the nozzle (545) and the first portion (541) are of an integral structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120206930.8U CN215260571U (en) | 2021-01-25 | 2021-01-25 | Pulverized coal hot water boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120206930.8U CN215260571U (en) | 2021-01-25 | 2021-01-25 | Pulverized coal hot water boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215260571U true CN215260571U (en) | 2021-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120206930.8U Active CN215260571U (en) | 2021-01-25 | 2021-01-25 | Pulverized coal hot water boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215260571U (en) |
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2021
- 2021-01-25 CN CN202120206930.8U patent/CN215260571U/en active Active
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