CN219757088U - Flue gas waste heat recovery system - Google Patents
Flue gas waste heat recovery system Download PDFInfo
- Publication number
- CN219757088U CN219757088U CN202321197684.XU CN202321197684U CN219757088U CN 219757088 U CN219757088 U CN 219757088U CN 202321197684 U CN202321197684 U CN 202321197684U CN 219757088 U CN219757088 U CN 219757088U
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- heat exchange
- pipe
- flue gas
- waste heat
- recovery system
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- 239000002918 waste heat Substances 0.000 title claims abstract description 61
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 239000003546 flue gas Substances 0.000 title claims abstract description 59
- 238000011084 recovery Methods 0.000 title claims abstract description 51
- 238000010257 thawing Methods 0.000 claims abstract description 31
- 239000008234 soft water Substances 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 238000009826 distribution Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000010025 steaming Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 239000000571 coke Substances 0.000 description 16
- 229920006395 saturated elastomer Polymers 0.000 description 10
- 239000003245 coal Substances 0.000 description 6
- 239000002912 waste gas Substances 0.000 description 5
- 238000004939 coking Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model provides a flue gas waste heat recovery system, which is used for recovering flue gas waste heat in a flue, the side wall of the flue is provided with an outlet and a return port, a flap valve is arranged between the outlet and the return port on the flue, and the system comprises: the two ends of the guiding pipe are respectively connected with the guiding outlet and the guiding return port; the heat exchange box group and one end of the air supply pipe are sequentially communicated with the guide pipe along the air-entraining direction; the first heat exchange pipes penetrate through the heat exchange box groups, and soft water flowing in the first heat exchange pipes exchanges heat through the heat exchange box groups and outputs steam; the air spraying pipe group is communicated with the other end of the air supply pipe and is used for being arranged in the defrosting warehouse. According to the technical scheme, the two-stage recovery is carried out on the waste heat of the flue gas, the waste heat recovery is more sufficient, the heat loss and the energy waste are avoided, the energy saving and emission reduction effects are more obvious, and the method has huge economic benefits.
Description
Technical Field
The utility model belongs to the technical field of preheating recovery, and particularly relates to a flue gas waste heat recovery system.
Background
The coke oven uses the heat of gas combustion to isolate air and heat raw material coal to prepare coke. The coal gas is mixed with air through a lower spray pipe at the bottom of the ascending flame path of the combustion chamber and then burnt, so that heat is provided for the carbonization chamber. The burnt waste gas passes through the top of the vertical flame path and spans the holes to enter the descending flame path, part of heat is recovered by the lattice bricks and then sent to a chimney through a flue to be discharged into the atmosphere, and the part of gas is called coke oven flue waste gas.
The temperature of the coke oven flue gas is about 250 ℃ and can reach 300 ℃ at the highest, the heat brought by directly discharging the coke oven flue gas to the atmosphere accounts for 17% of the heat supply quantity of the coke oven, and most coke ovens directly emit the coke oven flue gas to the atmosphere through a chimney at present, so that great energy waste is caused.
Disclosure of Invention
The utility model aims to provide a flue gas waste heat recovery system aiming at the defects of the prior art, so as to solve the problems of great energy waste caused by that most coking plants directly diffuse the flue gas of a coke oven to the atmosphere through a chimney at present.
In order to achieve the above object, the present utility model provides a flue gas waste heat recovery system, the waste heat recovery system is used for recovering waste heat of flue gas in a flue, a side wall of the flue is provided with an outlet and a return port, a flap valve is arranged between the outlet and the return port on the flue, the system comprises:
the two ends of the guide pipe are respectively connected with the leading-out port and the leading-back port;
the heat exchange box group and the air supply pipe are sequentially communicated with the guide pipe along the air-entraining direction;
the soft water flowing in the first heat exchange tube exchanges heat through the heat exchange box group and outputs steam;
the air spraying pipe group is communicated with the other end of the air supply pipe and is used for being arranged in the defrosting warehouse.
Preferably, the flue gas waste heat recovery system further comprises three shut-off valves respectively connected to the guide pipe between the outlet and the heat exchange box group, the guide pipe between the return port and the blast pipe, and the blast pipe.
Preferably, the flue gas waste heat recovery system further comprises a fan connected to the guide pipe between the heat exchange box group and the blast pipe.
Preferably, the heat exchange box group includes:
the first heat exchange box penetrates through part of the first heat exchange tubes;
the second heat exchange box is communicated with the guide pipe;
the second heat exchange pipes penetrate through the second heat exchange boxes, heat exchange steaming agents circulate in the second heat exchange pipes, and two ends of the second heat exchange pipes are communicated with the first heat exchange boxes.
Preferably, the heat exchange box group further comprises a preheating box, the preheating box is communicated with the guide pipe and is positioned between the second heat exchange box and the air supply pipe, and part of the first heat exchange pipe penetrates through the preheating box.
Preferably, the heat exchange box group further comprises:
the two ends of the communicating pipe are communicated with the first heat exchange pipe, one end of the communicating pipe is positioned between one end of the first heat exchange pipe and the preheating tank, and the other end of the communicating pipe is positioned between the first heat exchange tank and the preheating tank;
and three valves respectively connected to the first heat exchange tube between one end of the communicating tube and the preheating tank, the first heat exchange tube between the other end of the communicating tube and the first heat exchange tank, and the communicating tube.
Preferably, the air spraying pipe group comprises at least one air distribution pipe, the middle part of at least one air distribution pipe is communicated with the other end of the air supply pipe, and a plurality of air supply openings are formed in at least one air distribution pipe.
Preferably, the number of the air distribution pipes is two, and the two air distribution pipes are respectively arranged at two sides of the thawing warehouse.
Preferably, the air supply port faces to the inside of the thawing warehouse, and the air supply port is inclined upwards by 45 degrees.
Preferably, the flue gas waste heat recovery system further comprises a water tank, and the water tank is communicated with one end of the first heat exchange tube.
The utility model provides a flue gas waste heat recovery system, which has the beneficial effects that: a part of the first heat exchange pipe of the system passes through the heat exchange box group and is used for primary recovery of flue gas waste heat, soft water is input into the first heat exchange pipe in the primary recovery process, the soft water exchanges heat through the heat exchange box group and can be changed into steam, the steam can be used for heating or equipment heat preservation of a peripheral production system, the air injection pipe group of the system is communicated with the other end of the air injection pipe and is used for secondary recovery of the flue gas waste heat, the flue gas after the primary recovery of the waste heat is sent into the air injection pipe group through the air injection pipe group in the secondary recovery process, the air injection pipe group is used for injecting the flue gas into a defrosting warehouse, and the residual waste heat of the flue gas can be used as the waste heat of the defrosting warehouse, so that raw coal in the dumper can be used for defrosting is avoided.
Additional features and advantages of the utility model will be set forth in the detailed description which follows.
Drawings
The foregoing and other objects, features and advantages of the utility model will be apparent from the following more particular descriptions of exemplary embodiments of the utility model as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the utility model.
FIG. 1 illustrates a block diagram of a flue gas waste heat recovery system according to one embodiment of the present utility model.
Reference numerals illustrate:
1. a flue; 2. a flap valve; 3. a guide tube; 4. an air supply pipe; 5. a first heat exchange tube; 6. thawing a warehouse; 7. a shut-off valve; 8. a first heat exchange tank; 9. a second heat exchange tank; 10. a second heat exchange tube; 11. a preheating box; 12. a communicating pipe; 13. a valve; 14. an air distribution pipe; 15. an air supply port; 16. a water tank; 17. a blower; 18. coke oven; 19. and (5) a chimney.
Detailed Description
Preferred embodiments of the present utility model will be described in more detail below. While the preferred embodiments of the present utility model are described below, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
As shown in fig. 1, the present utility model provides a flue gas waste heat recovery system, the waste heat recovery system is used for recovering waste heat of flue gas in a flue 1, a side wall of the flue 1 is provided with an outlet and a return port, a flap valve 2 is arranged between the outlet and the return port on the flue 1, the system comprises:
the two ends of the guide pipe 3 are respectively connected with the outlet and the return port;
the heat exchange box group and the air supply pipe 4 are sequentially communicated with the guide pipe 3 along the air-entraining direction between the interior of the heat exchange box group and one end of the air supply pipe 4;
the first heat exchange pipes 5, part of the first heat exchange pipes 5 pass through the heat exchange box group, soft water flowing in the first heat exchange pipes 5 exchanges heat through the heat exchange box group and outputs steam;
the air spraying pipe group is communicated with the other end of the air supply pipe 4 and is arranged in the defrosting warehouse 6.
Specifically, in order to solve the problems that the temperature of the coke oven flue waste gas is about 250 ℃ and can reach 300 ℃ at the highest, heat brought out of the coke oven flue waste gas directly discharged to the atmosphere accounts for 17% of the heat supplied by the coke oven, most of coking plants at present directly release the coke oven flue waste gas to the atmosphere through a chimney, and extremely large energy waste is caused.
A flap valve 2 is arranged between an outlet and a return port on a flue 1 of the system, and when the waste heat recovery system is overhauled, the flap valve 2 is opened to enable flue gas to be directly discharged outside through the flue 1, so that the waste heat recovery system is prevented from being overhauled.
Preferably, one end of the flue 1 is used for the connection of the coke oven 18, and the other end of the flue 1 is used for the connection of the chimney 19.
Specifically, in the primary recovery process, the waste heat of the flue gas at the temperature of 250 ℃ is used for primary recovery, after primary recovery, the waste heat of the flue gas can be reduced to 160 ℃, and in the secondary recovery process, the waste heat of the flue gas at the temperature of 160 ℃ is used for secondary recovery.
Preferably, the flue gas waste heat recovery system further comprises three shut-off valves 7 connected to the guide pipe 3 between the outlet and the heat exchanger box group, to the guide pipe 3 between the return outlet and the air supply pipe 4 and to the air supply pipe 4, respectively.
Specifically, when the waste heat recovery system is overhauled, the cut-off valve 7 between the outlet and the heat exchange box group is closed, so that flue gas is directly discharged through the flue 1, and the waste heat recovery system is prevented from being overhauled;
when the defrosting warehouse does not work in summer, a cut-off valve 7 between the outlet and the heat exchange box group is opened, a cut-off valve 7 between the return outlet and the air supply pipe 4 is opened, the cut-off valve 7 on the air supply pipe 4 is closed, and after the flue gas waste heat is recovered to prepare low-pressure saturated steam, the low-pressure saturated steam is sent to the flue 1 and discharged outside through the chimney 19;
when the defrosting warehouse works in winter, the cut-off valve 7 between the outlet and the heat exchange box group is opened, the cut-off valve 7 on the blast pipe 4 is opened, the cut-off valve 7 between the return port and the blast pipe 4 is closed, and after the low-pressure saturated steam is prepared by recovering the waste heat of the flue gas, the low-pressure saturated steam is sent to the defrosting warehouse 6 for defrosting raw coal in the dumper.
Preferably, the flue gas waste heat recovery system further comprises a fan 17 connected to the guide tube 3 between the heat exchange box group and the blast tube 4.
Specifically, the fan 17 can accelerate the transportation of 160 ℃ flue gas waste heat to the thawing warehouse 6, and the temperature of the thawing warehouse 6 can be kept within the range of 100-120 ℃ to defrost raw material coal.
Preferably, the heat exchange box group includes:
the first heat exchange box 8 penetrates through part of the first heat exchange tubes 5 in the first heat exchange box 8;
a second heat exchange tank 9 which is communicated with the guide pipe 3;
and a second heat exchange tube 10, wherein part of the second heat exchange tube 10 passes through the second heat exchange box 9, a heat exchange steaming agent circulates in the second heat exchange tube 10, and two ends of the second heat exchange tube 10 are communicated with the first heat exchange box 8.
Specifically, the heat exchange evaporator can be demineralized water, in the heat exchange process, a steam-water circulation system is utilized, the demineralized water circulated in the second heat exchange tube 10 exchanges heat with the waste heat of the flue gas at 250 ℃ in the second heat exchange box 9, the circulated demineralized water is heated to form steam, one end of the second heat exchange tube 10 enters the first heat exchange box 9 to exchange heat with soft water in the first heat exchange tube 5 in the first heat exchange box 9, the soft water absorbs heat and evaporates to form 0.4MPa low-pressure saturated steam, and the low-pressure saturated steam can be externally sent to be used for heating deaerator communicating with a plant area pipe network in a dry quenching power generation system to heat supply or equipment heat preservation of the production system; after the steam sent into the first heat exchange box 9 through the second heat exchange tube 10 is cooled, the steam-water separation condensed water returns into the second heat exchange box 10 from the other end of the second heat exchange tube 10, and is heated again to form steam, and heat exchange is repeated.
Preferably, the heat exchange box group further comprises:
the preheating tank 11 is communicated with the guide pipe 3 and is positioned between the second heat exchange tank 9 and the air supply pipe 4, and part of the first heat exchange pipe 5 passes through the preheating tank 11.
A communicating pipe 12, both ends of the communicating pipe 12 are communicated with the first heat exchange tube 5, one end of the communicating pipe 12 is positioned between one end of the first heat exchange tube 5 and the preheating tank 11, and the other end of the communicating pipe 12 is positioned between the first heat exchange tank 8 and the preheating tank 11;
three valves 13 are connected to the first heat exchange tube 5 between one end of the communication tube 12 and the preheating tank 11, the first heat exchange tube 5 between the other end of the communication tube 12 and the first heat exchange tank 5, and the communication tube 12, respectively.
Specifically, when the defrosting warehouse does not work in summer, the valve 13 between one end of the communicating pipe 12 and the preheating box 11 is opened, the valve 13 between the other end of the communicating pipe 12 and the first heat exchange box 5 is opened, the valve 13 on the communicating pipe 12 is closed, the preheating box 11 works to preheat soft water, the soft water is fully utilized to recycle the flue gas waste heat, when the preheating box 11 is adopted, the temperature of the flue gas waste heat discharged while the heat is effectively recycled is relatively high, and the corrosion of the flue 1 and the guide pipe 3 caused by sulfuric acid generated by SO2 and H2O in the flue gas is avoided;
when the defrosting warehouse works in winter, the valve 13 on the communicating pipe 12 is opened, the valve 13 between the other end of the communicating pipe 12 and the first heat exchange box 5 is opened, the valve 13 between one end of the communicating pipe 12 and the preheating box 11 is closed, the preheater 13 does not work, and then the temperature of the waste heat of the flue gas in the defrosting warehouse is ensured.
Preferably, the air-spraying pipe group comprises at least one air distribution pipe 14, the middle part of the at least one air distribution pipe 14 is communicated with the other end of the air supply pipe 4, and a plurality of air supply openings 15 are arranged on the at least one air distribution pipe 14;
the number of the air distribution pipes 14 is two, and the two air distribution pipes 14 are respectively arranged at two sides of the thawing warehouse 6;
the air outlet 15 faces the inside of the thawing chamber 6, and the air outlet 15 is inclined upward by 45 degrees.
Specifically, air distribution pipes 14 are arranged at two sides in the thawing warehouse, air supply holes 15 are formed in the air distribution pipes at intervals, the air supply holes 15 are obliquely upwards at 45 degrees and are opposite to the carriage of the tippler to blow hot air, raw material coal thawing can be realized, branch pipes are arranged in the part of the air supply pipes 4 in the thawing warehouse for ensuring uniform air supply temperature and air quantity, and air is supplied from the middle to two sides, so that the conditions of overlong air distribution pipes 14, large resistance loss and uneven heating of one side are avoided; in the secondary recovery process, the device is used for secondary recovery of the waste heat of 160 ℃ flue gas, the temperature is relatively low, the mixed temperature regulation of return air of a thawing warehouse 6 is not needed, the control system is simple, the occupied area is small, and the investment is low.
Preferably, the flue gas waste heat recovery system further comprises a water tank 16, the water tank 16 being in communication with one end of the first heat exchange tube 5.
Specifically, the softened water required by the independent coking enterprise system can be provided by a coke plant dry quenching Jiao Ruanshui preparation system; the softened water required by the steel combined enterprise system can be provided by a factory soft water pipe network. A soft water tank 16 is provided to ensure soft water supply continuity.
Preferably, the outside of the guide pipe 3, the blast pipe 4, the air distribution pipe 14 and the branch pipes are provided with heat insulation layers.
Specifically, the heat energy recovery rate is improved.
In summary, the flue gas waste heat recovery system provided by the utility model comprises three working conditions, and is specifically as follows:
working condition one: when the waste heat recovery system is overhauled, the cut-off valve 7 between the outlet and the heat exchange box group is closed, and the flap valve 2 is opened, so that flue gas is directly discharged through the flue 1, and the overhauling of the waste heat recovery system is prevented from being influenced.
Working condition II: the defrosting warehouse does not work in summer, a cut-off valve 7 between the outlet and the heat exchange box group is opened, a cut-off valve 7 between the return outlet and the air supply pipe 4 is opened, the cut-off valve 7 on the air supply pipe 4 is closed, the flue gas waste heat is recycled to prepare low-pressure saturated steam, and the low-pressure saturated steam is sent to the flue 1 and discharged outside through the chimney 19; opening a valve 13 between one end of the communicating pipe 12 and the preheating tank 11 and opening a valve 13 between the other end of the communicating pipe 12 and the first heat exchange tank 5, closing the valve 13 on the communicating pipe 12, and operating the preheating tank 11 to preheat soft water and fully utilize the soft water to recycle flue gas waste heat.
And (3) working condition III: the defrosting warehouse works in winter, a cut-off valve between an outlet and the heat exchange box group is opened, a cut-off valve 7 on the blast pipe 4 is opened, the cut-off valve 7 between the outlet and the blast pipe 4 is closed, and after low-pressure saturated steam is prepared by recovering waste heat of flue gas, the low-pressure saturated steam is sent to the defrosting warehouse 6 for defrosting raw coal in the dumper; the valve 13 on the communicating pipe 12 is opened, the valve 13 between the other end of the communicating pipe 12 and the first heat exchange tank 5 is opened, the valve 13 between one end of the communicating pipe 12 and the preheating tank 11 is closed, and the preheater 13 does not work, so that the waste heat temperature of the flue gas in the defrosting warehouse 6 is ensured.
The foregoing description of embodiments of the utility model has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.
Claims (10)
1. The utility model provides a flue gas waste heat recovery system, waste heat recovery system is used for retrieving flue gas waste heat in the flue, the lateral wall of flue is equipped with draws the export and draws back the mouth, be located on the flue draw forth the mouth with draw back to be equipped with the flap valve between the mouth, its characterized in that, this system includes:
the two ends of the guide pipe are respectively connected with the leading-out port and the leading-back port;
the heat exchange box group and the air supply pipe are sequentially communicated with the guide pipe along the air-entraining direction;
the soft water flowing in the first heat exchange tube exchanges heat through the heat exchange box group and outputs steam;
the air spraying pipe group is communicated with the other end of the air supply pipe and is used for being arranged in the defrosting warehouse.
2. The flue gas waste heat recovery system according to claim 1, further comprising three shut-off valves connected to the guide pipe between the outlet and the heat exchange box group, the guide pipe between the return port and the blast pipe, respectively.
3. The flue gas waste heat recovery system of claim 1, further comprising a fan connected to the guide tube between the heat exchange box group and the air supply duct.
4. The flue gas waste heat recovery system of claim 1, wherein the heat exchange box group comprises:
the first heat exchange box penetrates through part of the first heat exchange tubes;
the second heat exchange box is communicated with the guide pipe;
the second heat exchange pipes penetrate through the second heat exchange boxes, heat exchange steaming agents circulate in the second heat exchange pipes, and two ends of the second heat exchange pipes are communicated with the first heat exchange boxes.
5. The flue gas waste heat recovery system of claim 4, wherein said heat exchange box assembly further comprises a preheating box in communication with said guide tube and positioned between said second heat exchange box and said blast tube, a portion of said first heat exchange tube passing through said preheating box.
6. The flue gas waste heat recovery system of claim 5, wherein the heat exchange box assembly further comprises:
the two ends of the communicating pipe are communicated with the first heat exchange pipe, one end of the communicating pipe is positioned between one end of the first heat exchange pipe and the preheating tank, and the other end of the communicating pipe is positioned between the first heat exchange tank and the preheating tank;
and three valves respectively connected to the first heat exchange tube between one end of the communicating tube and the preheating tank, the first heat exchange tube between the other end of the communicating tube and the first heat exchange tank, and the communicating tube.
7. The flue gas waste heat recovery system according to claim 1, wherein the air injection pipe group comprises at least one air distribution pipe, the middle part of at least one air distribution pipe is communicated with the other end of the air supply pipe, and a plurality of air supply openings are formed in at least one air distribution pipe.
8. The flue gas waste heat recovery system according to claim 7, wherein the number of the air distribution pipes is two, and the two air distribution pipes are respectively arranged at two sides of the thawing warehouse.
9. The flue gas waste heat recovery system of claim 8, wherein said air supply port is oriented inwardly of said defrost tank, said air supply port being oriented at an angle of 45 degrees obliquely upward.
10. The flue gas waste heat recovery system of claim 1, further comprising a water tank in communication with one end of the first heat exchange tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321197684.XU CN219757088U (en) | 2023-05-17 | 2023-05-17 | Flue gas waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321197684.XU CN219757088U (en) | 2023-05-17 | 2023-05-17 | Flue gas waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219757088U true CN219757088U (en) | 2023-09-26 |
Family
ID=88073693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321197684.XU Active CN219757088U (en) | 2023-05-17 | 2023-05-17 | Flue gas waste heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219757088U (en) |
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2023
- 2023-05-17 CN CN202321197684.XU patent/CN219757088U/en active Active
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