CN220417370U - Horizontal air preheater utilizing positive pressure dust-laden flue gas waste heat - Google Patents
Horizontal air preheater utilizing positive pressure dust-laden flue gas waste heat Download PDFInfo
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- CN220417370U CN220417370U CN202322116895.2U CN202322116895U CN220417370U CN 220417370 U CN220417370 U CN 220417370U CN 202322116895 U CN202322116895 U CN 202322116895U CN 220417370 U CN220417370 U CN 220417370U
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- cavity
- flue gas
- cavities
- waste heat
- positive pressure
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000003546 flue gas Substances 0.000 title claims abstract description 44
- 239000002918 waste heat Substances 0.000 title claims abstract description 21
- 239000000428 dust Substances 0.000 claims abstract description 22
- 238000005192 partition Methods 0.000 claims abstract description 19
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A horizontal air preheater utilizing positive pressure dust-laden flue gas waste heat relates to the technical field of air preheaters, and the adopted technical scheme comprises a first cavity, a second cavity and a heat exchange tube, wherein two ends of the first cavity are respectively provided with a flue gas inlet and a flue gas outlet; the two second cavities are respectively arranged at two sides of the first cavity and are not communicated with the second cavities, the second cavities are provided with at least 1 first partition board, and the first partition board divides the second cavities into a plurality of third cavities; the heat exchange tubes are arranged in the first cavity, and the third cavities on two sides of the first cavity are sequentially communicated to form an air circulation channel. According to the utility model, the cylinder body is divided into the first cavity and the two second cavities, the second cavity is divided into the plurality of third cavities, the plurality of third cavities on two sides of the first cavity are sequentially connected into the air circulation channel by the heat exchange tube, and the dust-containing flue gas flows in the first cavity to complete heat exchange with air in the heat exchange tube so as to preheat the air, thereby achieving the purpose of waste heat recovery and no leakage of the dust-containing flue gas.
Description
Technical Field
The utility model relates to the technical field of air preheaters, in particular to a horizontal air preheater utilizing positive pressure dust-laden flue gas waste heat.
Background
The industrial sulfur (solid or liquid) in the sulfuric acid industry is roasted to generate flue gas with high dust content and sulfur dioxide, the flue gas is at the temperature of 700-1100 ℃, the flue gas enters a waste heat boiler to perform heat exchange, waste heat in the flue gas is absorbed, water in the boiler is converted into high-position steam with pressure to be used as steam for power generation or industrial production, and meanwhile, the dust content of the flue gas is reduced. The waste heat of the dust-containing flue gas is still usable at medium and low temperature after heat exchange by the waste heat boiler, and an air preheater is generally adopted to preheat air by utilizing the medium and low temperature waste heat, and then the air is sent to a sulfur burner. However, the air preheater adopted by the prior sulfur acid making system can only operate in a negative pressure environment, additional negative pressure equipment is required to be installed, the sulfur acid making system cannot be directly applied to a positive pressure environment, otherwise, smoke leakage is caused in the air preheating process, and environmental pollution is caused.
Disclosure of Invention
Aiming at the problem that the air preheater in the prior art cannot be directly applied to a positive pressure environment, the utility model provides a horizontal air preheater utilizing positive pressure dust-laden flue gas waste heat.
The utility model provides the following technical scheme: a horizontal air preheater utilizing positive pressure dusty flue waste heat, comprising:
the two ends of the first cavity are respectively provided with a smoke inlet and a smoke outlet;
the second cavities are respectively arranged at two sides of the first cavity and are not communicated with the second cavities, at least 1 first partition plate is arranged in the second cavities, and the first partition plates divide the second cavities into a plurality of third cavities;
the heat exchange tubes are arranged in the first cavity, a plurality of third cavities on two sides of the first cavity are sequentially communicated to form an air circulation channel, the second cavity is further provided with an air inlet and an air outlet which are communicated with the air circulation channel, the air inlet is arranged at one end close to the smoke outlet, and the air outlet is arranged at one end close to the smoke inlet.
Preferably, the device comprises a cylinder body and two sealing heads respectively arranged at two ends of the cylinder body, wherein a flue gas inlet and a flue gas outlet are respectively arranged on the two sealing heads; two second partition boards extending along the length direction of the cylinder body are arranged in the cylinder body, and the two second partition boards divide the inside of the cylinder body into the first cavity and the second cavity.
Preferably, one second cavity is provided with 1 first baffle, the other second cavity is provided with 2 first baffles, and 3 first baffles are arranged at intervals in the length direction of the cylinder.
Preferably, the extending direction of the heat exchange tubes is perpendicular to the length direction of the cylinder, and the air flow direction in the air flow channel is S-shaped.
Preferably, the bottom of the cylinder is also provided with a plurality of ash hoppers, each ash hopper is provided with an ash outlet, and each ash outlet is provided with an ash discharge valve.
Preferably, a plurality of access ports are formed in the top of the cylinder, and a sealing cover is arranged on each access port.
Preferably, the outer surface of the cylinder is also covered with an insulating layer.
The beneficial effects of the utility model are as follows: the cylinder body is divided into a first cavity and two second cavities, the second cavities are divided into a plurality of third cavities, the third cavities on two sides of the first cavity are sequentially connected into an air circulation channel through the heat exchange tube, dust-containing flue gas flows in the first cavity, heat exchange is completed with air in the heat exchange tube to preheat the air, the purpose of waste heat recovery is achieved, and the dust-containing flue gas does not leak when flowing through the first cavity under the action of positive pressure.
Drawings
FIG. 1 is a schematic diagram I of an embodiment of the present utility model.
Fig. 2 is a schematic structural diagram ii of an embodiment of the present utility model.
Fig. 3 is a schematic diagram iii of an embodiment of the present utility model.
Reference numerals: 10. a first cavity; 11. a flue gas inlet; 12. a flue gas outlet; 20. a second cavity; 21. a first separator; 22. a third cavity; 23. an air inlet; 24. an air outlet; 30. a heat exchange tube; 40. a cylinder; 41. a seal head; 42. a second separator; 43. an ash bucket; 44. an access opening; 45. and a heat preservation layer.
Description of the embodiments
Embodiments of the present utility model will be described in more detail below with reference to the drawings and reference numerals, so that those skilled in the art can practice the present utility model after studying the specification. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The present utility model provides a horizontal air preheater utilizing positive pressure dust laden flue gas waste heat as shown in fig. 1-3, comprising a first cavity 10, a second cavity 20 and a heat exchange tube 30. Specifically, two second partitions 42 extending along the length direction of the cylinder 40 divide the inside of the cylinder 40 into three cavities, namely a first cavity 10 in the middle and two second cavities 20 disposed on both sides of the first cavity 10.
The first cavity 10 is a flue gas circulation channel, sealing heads 41 are arranged at two ends of the cylinder body 40 to seal the first cavity 10, a flue gas inlet 11 and a flue gas outlet 12 are respectively arranged on the two sealing heads 41, and dust-containing gas enters from the flue gas inlet 11 under the positive pressure effect, flows through the first cavity 10 and flows out from the flue gas outlet 12. The two second cavities 20 are respectively arranged at two sides of the first cavity 10 and are not communicated with the second cavities 20, the second cavities 20 are provided with at least 1 first partition plate 21, and the first partition plate 21 divides the second cavities 20 into a plurality of third cavities 22. In this embodiment, one second cavity 20 is provided with 1 first partition plate 21 to divide it into two third cavities, the other second cavity 20 is provided with 2 first partition plates 21 to divide it into 3 third cavities, and 3 first partition plates 21 are arranged at intervals in the length direction of the cylinder, so that the plurality of third cavities at two sides of the first cavity 10 are staggered with each other, and the connection of the heat exchange tube 30 is facilitated.
The heat exchange tubes 30 are disposed in the first cavity 10, and sequentially connect the third cavities 22 on both sides of the first cavity 10 to form an air circulation channel. In this embodiment, as shown in fig. 1-3, the installation mode of the heat exchange tubes 30 is that the extending direction of the heat exchange tubes 30 is perpendicular to the length direction of the cylinder 40, the installation positions of the heat exchange tubes 30 are divided into 4 areas, the heat exchange tubes 30 in each area are distributed in an array (only the heat exchange tubes at the edge of each area are shown in fig. 2), and the 5 third cavities 22 are sequentially connected, so that the air flow direction in the air circulation channel is S-shaped, as shown by the arrow direction in fig. 1. The heat exchange tube 30 is fully covered by the dust-containing flue gas, and the air passes through the first cavity 10 when flowing through the heat exchange tube 30, so that the heat exchange efficiency with the dust-containing flue gas is higher.
The second cavity 20 is further provided with an air inlet 23 and an air outlet 24 which are communicated with the air circulation channel, the air inlet 23 is arranged at one end close to the flue gas outlet 12, and the air outlet 24 is arranged at one end close to the flue gas inlet 11, so that air reversely flows relative to dust-containing flue gas, and the heat exchange effect is enhanced.
Preferably, a plurality of ash hoppers 43 are further arranged at the bottom of the cylinder 40, and the ash hoppers 43 are provided with ash outlets, and the ash outlets are provided with ash discharge valves. The dust-containing flue gas contains a certain amount of smoke dust, dust is easy to generate in the first cavity 10 and on the heat exchange tube 30, the dust is collected into the ash bucket 43 after the dust is cleaned, and the dust is discharged from the ash outlet after the ash discharge valve is opened. The ash discharge valve is in a closed state when the air preheater works normally.
Preferably, a plurality of access holes 44 are formed in the top of the cylinder 40, so that a worker can conveniently enter the cylinder for overhaul and ash removal, the safety and stability during operation are improved, and the heat exchange efficiency is improved. The access opening 44 is provided with a cover which closes the access opening during normal operation of the air preheater.
Preferably, the outer surface of the cylinder 40 is further covered with an insulating layer 45 to reduce heat dissipation.
The foregoing is a description of one or more embodiments of the utility model, which are specific and detailed, but are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (7)
1. A horizontal air preheater utilizing positive pressure dust laden flue gas waste heat, comprising:
the flue gas treatment device comprises a first cavity (10), wherein a flue gas inlet (11) and a flue gas outlet (12) are respectively arranged at two ends of the first cavity (10);
the two second cavities (20) are respectively arranged at two sides of the first cavity (10) and are not communicated with the second cavities (20), the second cavities (20) are provided with at least 1 first partition board (21), and the first partition board (21) divides the second cavities (20) into a plurality of third cavities (22);
the heat exchange tubes (30), a plurality of heat exchange tubes (30) are arranged in the first cavity (10), a plurality of third cavities (22) on two sides of the first cavity (10) are sequentially communicated to form an air circulation channel, the second cavity (20) is further provided with an air inlet (23) and an air outlet (24) which are communicated with the air circulation channel, the air inlet (23) is arranged at one end close to the flue gas outlet (12), and the air outlet (24) is arranged at one end close to the flue gas inlet (11).
2. A horizontal air preheater utilizing positive pressure dust-laden flue gas waste heat according to claim 1, comprising a cylinder (40) and two seal heads (41) respectively arranged at two ends of the cylinder (40), wherein the flue gas inlet (11) and the flue gas outlet (12) are respectively arranged on the two seal heads (41); two second partition plates (42) extending along the length direction of the cylinder body are arranged in the cylinder body (40), and the two second partition plates (42) divide the inside of the cylinder body into the first cavity (10) and the second cavity (20).
3. A horizontal air preheater utilizing positive pressure dust laden flue gas waste heat according to claim 1, wherein one of said second cavities (20) is provided with 1 said first partition (21), the other of said second cavities (20) is provided with 2 said first partitions (21), and 3 said first partitions (21) are arranged at intervals in the longitudinal direction of the cylinder.
4. A horizontal air preheater utilizing positive pressure dust laden flue waste heat as claimed in claim 3, wherein the plurality of heat exchange tubes (30) extend in a direction perpendicular to the length of said cylinder, and the direction of air flow in said air flow passage is S-shaped.
5. A horizontal air preheater utilizing positive pressure dust laden flue gas waste heat as claimed in claim 2, wherein said barrel (40) bottom is further provided with a plurality of ash hoppers (43), said ash hoppers (43) being provided with ash outlets provided with ash discharge valves.
6. A horizontal air preheater utilizing positive pressure dusty flue waste heat according to claim 2, wherein the top of the barrel (40) is provided with a plurality of access ports (44), the access ports (44) being provided with a cover.
7. A horizontal air preheater utilizing positive pressure dusty flue waste heat according to claim 2, wherein the outer surface of the barrel (40) is further covered with a heat insulating layer (45).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322116895.2U CN220417370U (en) | 2023-08-08 | 2023-08-08 | Horizontal air preheater utilizing positive pressure dust-laden flue gas waste heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322116895.2U CN220417370U (en) | 2023-08-08 | 2023-08-08 | Horizontal air preheater utilizing positive pressure dust-laden flue gas waste heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220417370U true CN220417370U (en) | 2024-01-30 |
Family
ID=89643162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322116895.2U Active CN220417370U (en) | 2023-08-08 | 2023-08-08 | Horizontal air preheater utilizing positive pressure dust-laden flue gas waste heat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220417370U (en) |
-
2023
- 2023-08-08 CN CN202322116895.2U patent/CN220417370U/en active Active
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