CN210319073U - Anti-oxidation structure for hearth radiation furnace tube - Google Patents
Anti-oxidation structure for hearth radiation furnace tube Download PDFInfo
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- CN210319073U CN210319073U CN201920757312.5U CN201920757312U CN210319073U CN 210319073 U CN210319073 U CN 210319073U CN 201920757312 U CN201920757312 U CN 201920757312U CN 210319073 U CN210319073 U CN 210319073U
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- soot blowing
- radiation furnace
- air
- furnace
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Abstract
The utility model relates to an anti-oxidation structure for a hearth radiation furnace tube, which comprises a radiation section, wherein a radiation furnace tube row consisting of a plurality of groups of single-pass radiation furnace tubes and/or a radiation furnace tube row consisting of a plurality of-pass radiation furnace tubes are vertically arranged in the radiation section, the anti-oxidation structure also comprises a soot blowing and air injecting device which is provided with a plurality of soot blowing air nozzles, the surface of the radiation furnace tube row is coated with an anti-oxidation coating, and the soot blowing air nozzles are embedded between adjacent radiation furnace tubes, and the soot blowing air nozzles form a matrix shape on the surface of the radiation furnace tube row, the soot blowing air nozzle sprays air to blow off attachments, and the anti-slagging effect is good.
Description
Technical Field
The utility model relates to a cracking furnace technical field especially relates to an anti oxidation structure for furnace radiation boiler tube.
Background
Most cracking furnaces at present generally comprise a combustion chamber, a radiation section and a convection section, wherein a radiation furnace tube row consisting of a plurality of groups of single-pass radiation furnace tubes and/or a radiation furnace tube row consisting of a plurality of passes of radiation furnace tubes are vertically arranged in the radiation section of the cracking furnace, the combustion chamber is arranged below the radiation section and is provided with a plurality of burners, the radiation furnace tubes in the radiation section are subjected to radiation heat transfer, so that the materials in the furnace tube can be rapidly heated in a very short residence time, but the content of the radiation furnace tube is mostly metallic iron material, under the high-temperature environment, the metallic iron of the radiation furnace tube is easy to react with sulfide type compounds in the flue gas, and is slowly oxidized to generate black magnetic iron oxide Fe3O4, therefore, the surface of the radiation furnace tube is loosened and corroded, the oxidation resistance is poor, and the unburned coal particles are easy to slag on the radiation furnace tube, so that the metallic iron of the radiation furnace tube is further oxidized into magnetic iron oxide.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides an anti oxidation structure for furnace radiation boiler tube, its oxidation resistance is strong, and it is effectual to prevent slagging scorification.
In order to solve the above-mentioned purpose, the utility model adopts the following technical scheme.
An anti-oxidation structure for a hearth radiation furnace tube comprises a radiation section, wherein a radiation furnace tube row consisting of a plurality of groups of single-pass radiation furnace tubes and/or a radiation furnace tube row consisting of a plurality of passes of radiation furnace tubes are vertically arranged in the radiation section, the anti-oxidation structure also comprises a soot blowing and air spraying device, the soot blowing and air spraying device is provided with a plurality of soot blowing air nozzles, anti-oxidation coatings are sprayed on the surfaces of the radiation furnace tube rows, the soot blowing air nozzles are embedded between the adjacent radiation furnace tubes, and the plurality of soot blowing air nozzles form a matrix shape on the surfaces of the radiation furnace tube rows.
Preferably, the soot blowing and air injecting device is provided with an injection pipe correspondingly connected with the soot blowing and air injecting nozzle, the injection pipe is provided with an inner pipe and an outer pipe, a compressed air channel for high-pressure compressed air to enter is arranged between the inner pipe and the outer pipe, and the inner pipe is provided with a hot air channel for secondary heat supply air to enter.
Preferably, the outlet of the inner pipe is arranged in a T-shaped or Y-shaped structure to form two hot air channel outlets for blowing out hot secondary air, and two compressed air channel outlets for jetting high-pressure compressed air are correspondingly formed between the outer pipe and the inner pipe.
Preferably, a partition plate is arranged in the soot blowing air nozzle and divides the inside of the soot blowing air nozzle into two ventilation channels.
Preferably, the oxidation-preventing coating is mainly a nano ceramic material layer.
The utility model has the advantages as follows:
the utility model discloses a radiant furnace tube bank surface coating has anti oxidation coating, can block the easy sulfide type compound with in the flue gas of metallic iron of radiant furnace tube and produce the reaction, slowly oxidize the phenomenon that generates black magnetic iron oxide Fe3O4, oxidation resistance is strong, set up the soot blowing air nozzle simultaneously between the radiant furnace tube, when the attachment on radiant furnace tube bank surface adheres to thickness to certain degree, the soot blowing air nozzle jets gas and falls in order to blow the attachment, it is effectual to prevent slagging scorification, prevent that the attachment slagging scorification is too thick on the one hand, lead to the heat transfer rate to descend, on the other hand prevents to corrode the oxidation to the radiant furnace tube, lead to the radiant furnace tube to break.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is an enlarged schematic view of a structure of fig. 1.
The attached drawings indicate the following: 1. the anti-oxidation coating is adopted, and the anti-oxidation coating is adopted, the soot blowing air injection device is adopted, the soot blowing air nozzle is adopted, the partition plate is adopted, the spray pipe is adopted, the compressed air channel is adopted, the partition plate is adopted, the compressed air channel inlet is adopted, the compressed air channel outlet is adopted, the hot air channel inlet is adopted, the hot air channel outlet is adopted, the hot air channel.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 2, an anti-oxidation structure for a hearth radiation furnace tube 1 comprises a radiation section, a radiation furnace tube 1 tube row composed of a plurality of groups of single-pass radiation furnace tubes 1 is vertically arranged in the radiation section, the embodiment further comprises a soot blowing and injecting device 2, the soot blowing and injecting device 2 is provided with a plurality of soot blowing nozzles 21, the surface of the tube row of the radiation furnace tube 1 is sprayed with an anti-oxidation coating 11, the soot blowing nozzles 21 are embedded between adjacent radiation furnace tubes 1, the plurality of soot blowing nozzles 21 form a matrix shape on the surface of the tube row of the radiation furnace tube 1, so that the surface of the tube row of the radiation furnace tube 1 is sprayed with the anti-oxidation coating 11, the phenomenon that metallic iron of the radiation furnace tube 1 is easy to react with sulfide compounds in flue gas and slowly oxidized to generate black magnetic iron oxide Fe3O4 can be prevented, the anti-oxidation property is strong, and the soot blowing nozzles 21 are arranged, when the attachment on the surface of the tube row of the radiation furnace tube 1 is attached to a certain thickness, the soot blowing air nozzle 21 blows air to blow off the attachment, the anti-slagging effect is good, on one hand, the attachment is prevented from being slagging excessively thick, the heat transfer rate is reduced, on the other hand, the radiation furnace tube 1 is prevented from being corroded and oxidized, the radiation furnace tube 1 is broken, the anti-oxidation coating 11 of the embodiment is mainly a nano ceramic material layer, therefore, the attachment of coal particles and the direct contact with the metal surface of the radiation furnace tube 1 of sulfide type compounds can be prevented, and the corrosion resistance and the oxidation resistance are strong.
As shown in fig. 1 and 2, the sootblowing air injection means 2 of the present embodiment is provided with an injection tube 22 connected correspondingly to the sootblowing air nozzle 21, the injection tube 22 is provided with an inner tube and an outer tube, a compressed air passage 221 for high-pressure compressed air to enter is provided between the inner tube and the outer tube, the inner pipe is provided with a hot air passage 224 for the secondary air, and referring to fig. 2, the outlet of the inner pipe of this embodiment is arranged in a T shape to form two hot air passage outlets 226 for the secondary air, two compressed air passage outlets 223 from which high-pressure compressed air is blown out are correspondingly formed between the outer pipe and the inner pipe, in other preferred embodiments, the outlet of the inner pipe may also be in a Y-shape, so that two hot air channel outlets 226 are formed, meanwhile, the outer pipe and the inner pipe are matched to form two compressed air channel outlets 223, which are not described in detail herein. Fig. 2 shows that a partition 211 is arranged in the soot blowing air nozzle 21, the partition 211 divides the interior of the soot blowing air nozzle 21 into two air passages, and the two air passages are respectively communicated with a hot air passage outlet 226 and a compressed air passage outlet 223, so that high-pressure compressed air flows in from the compressed air passage inlet 222 and flows out from the compressed air passage outlet 223, hot secondary air flows in from the hot air passage inlet 225 and flows out from the hot air passage outlet 226, the high-pressure compressed air is heated by the hot secondary air, the temperature of the high-pressure compressed air is raised, the influence of the high-pressure compressed air on the combustion environment in the furnace can be reduced, meanwhile, the attachments are blown off by utilizing the characteristics of high air pressure and high air flow ejection speed of the high-pressure compressed air, the temperature of the compressed air can be raised by the use of the hot secondary air, but the flow rate of the compressed air is not changed, and the advantages of, the comprehensive use performance is better, and the soot blowing use stability is high.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (5)
1. The utility model provides an anti oxidation structure for furnace radiation furnace pipe, includes the radiation section, has arranged perpendicularly in the radiation section by the radiation furnace tube bank that the multiunit single-trip radiation furnace pipe is constituteed and/or the radiation furnace tube bank that comprises the multipass radiation furnace pipe, its characterized in that: the device is characterized by further comprising a soot blowing and air spraying device, wherein the soot blowing and air spraying device is provided with a plurality of soot blowing and air spraying nozzles, the surfaces of the tube rows of the radiation furnace tubes are sprayed with anti-oxidation coatings, the soot blowing and air spraying nozzles are embedded between the adjacent radiation furnace tubes, and the plurality of soot blowing and air spraying nozzles form a matrix shape on the surfaces of the tube rows of the radiation furnace tubes.
2. The anti-oxidation structure for the furnace radiation furnace tube of claim 1, wherein: the soot blowing and air injection device is provided with an injection pipe correspondingly connected with a soot blowing air nozzle, the injection pipe is provided with an inner pipe and an outer pipe, a compressed air channel for high-pressure compressed air to enter is arranged between the inner pipe and the outer pipe, and the inner pipe is provided with a hot air channel for secondary heat supply air to enter.
3. The anti-oxidation structure for the furnace radiation furnace tube of claim 2, wherein: the outlet of the inner pipe is arranged in a T-shaped or Y-shaped structure to form two hot air channel outlets for blowing out heat supply secondary air, and two compressed air channel outlets for spraying high-pressure compressed air are correspondingly formed between the outer pipe and the inner pipe.
4. The anti-oxidation structure for the furnace radiation furnace tube of claim 2, wherein: the soot blowing air nozzle is internally provided with a partition plate which divides the interior of the soot blowing air nozzle into two ventilation channels.
5. The anti-oxidation structure for the furnace radiation furnace tube of claim 1, wherein: the anti-oxidation coating is mainly a nano ceramic material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920757312.5U CN210319073U (en) | 2019-05-23 | 2019-05-23 | Anti-oxidation structure for hearth radiation furnace tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920757312.5U CN210319073U (en) | 2019-05-23 | 2019-05-23 | Anti-oxidation structure for hearth radiation furnace tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210319073U true CN210319073U (en) | 2020-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920757312.5U Expired - Fee Related CN210319073U (en) | 2019-05-23 | 2019-05-23 | Anti-oxidation structure for hearth radiation furnace tube |
Country Status (1)
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| CN (1) | CN210319073U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361325A (en) * | 2020-10-29 | 2021-02-12 | 广东博盈特焊技术股份有限公司 | Overheating device and manufacturing method thereof |
-
2019
- 2019-05-23 CN CN201920757312.5U patent/CN210319073U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361325A (en) * | 2020-10-29 | 2021-02-12 | 广东博盈特焊技术股份有限公司 | Overheating device and manufacturing method thereof |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200414 Termination date: 20210523 |