CN216745643U - Phase change heat storage device and system for adjusting inlet air temperature of waste heat boiler - Google Patents
Phase change heat storage device and system for adjusting inlet air temperature of waste heat boiler Download PDFInfo
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- CN216745643U CN216745643U CN202123383585.4U CN202123383585U CN216745643U CN 216745643 U CN216745643 U CN 216745643U CN 202123383585 U CN202123383585 U CN 202123383585U CN 216745643 U CN216745643 U CN 216745643U
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Abstract
The utility model discloses a phase-change heat storage device and a system thereof for adjusting inlet air temperature of a waste heat boiler, wherein the phase-change heat storage device comprises: the left end of the shell is provided with an inlet, the right end of the shell is provided with an outlet, the top of the shell is provided with a plurality of stretching holes, the inlet is communicated with a flue gas outlet of production equipment through a pipeline, the outlet of the shell is communicated with a gas inlet of a waste heat boiler through a connecting pipe, the inner wall of the bottom of the shell is vertically provided with a plurality of positioning holes with blind holes, each positioning hole is superposed with the axis of the corresponding stretching hole, the heat storage unit consists of a closed shell and a heat storage material contained in the shell, the lower end of the heat storage unit sequentially penetrates through the stretching holes and the inner cavity of the shell from top to bottom and is fixed in the positioning holes, and the heat storage unit is used for regulating the temperature of flue gas entering the inner cavity of the shell by the heat storage material positioned in the heat storage unit and then conveying the flue gas to the waste heat boiler; by the arrangement of the waste heat boiler, the inlet flue gas temperature of the waste heat boiler is stable, and the heat efficiency of the system is high.
Description
Technical Field
The utility model belongs to the field of waste heat recovery, and particularly relates to a phase change heat storage device for adjusting the inlet air temperature of a waste heat boiler and a system thereof.
Background
In recent years, China is seeking economic growth modes of sustainability, compatibility and toughness, and the carbon peak carbon neutralization target vision requires China to establish a healthy green low-carbon cycle development economic system and a clean, low-carbon, efficient and safe modern energy production and consumption system. Energy conservation and emission reduction are long-term strategic guidelines for economic and social development in China, and are also important means for realizing carbon peak-reaching carbon neutralization vision. The waste heat recovery and energy consumption reduction have important practical significance for realizing energy conservation, emission reduction and environmental protection development strategy in China.
At present, the design and development of domestic waste heat energy-saving boilers are mature, and in the existing flue gas waste heat utilization system, flue gas generated by production equipment has large temperature fluctuation, so that when the waste heat boiler works, load regulation operation needs to be frequently carried out on equipment such as a water pump, a fan and a boiler. When the flue gas temperature is lower than the design temperature of the waste heat boiler, the heat efficiency of the boiler is reduced, the working output and the steam quality of the boiler are influenced, and the shutdown and the production halt are possibly caused; and when the flue gas temperature is higher than the design temperature of the waste heat boiler, the conditions of damaging materials, destroying water circulation and causing boiler deformation can occur, and safety accidents can also occur in serious cases.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a phase-change heat storage device for adjusting the inlet air temperature of a waste heat boiler and a system thereof, which are used for solving the problems that the equipment needs to be frequently operated and the normal work of the boiler can be influenced due to the fluctuation of the temperature of flue gas generated by production equipment.
The utility model adopts the following technical scheme: a phase change heat storage device for regulating inlet air temperature for a waste heat boiler, comprising:
the left end of the shell is provided with an inlet, the right end of the shell is provided with an outlet, the top of the shell is provided with a plurality of stretching holes, the inlet is communicated with a flue gas outlet of production equipment through a pipeline, the outlet is communicated with a gas inlet of a waste heat boiler through a connecting pipe, the inner wall of the bottom of the shell is vertically provided with a plurality of positioning holes with blind holes, and each positioning hole is coincided with the axis of the corresponding stretching hole,
the heat storage unit consists of a closed shell and a heat storage material contained in the shell, the lower end of the heat storage unit sequentially penetrates through the stretching hole and the shell inner cavity from top to bottom and is fixed in the positioning hole, and the heat storage unit is used for adjusting the temperature of the flue gas entering the shell inner cavity by the heat storage material positioned in the heat storage unit and then conveying the flue gas to the waste heat boiler.
Furthermore, the stretching hole is circular, the shell is of a hollow tubular structure, and heat storage materials are contained in the tubular structure.
Furthermore, the inserting hole is strip-shaped, the shell is of a hollow plate-shaped structure, and heat storage materials are contained in the plate-shaped structure.
Further, the heat storage material is a molten salt.
A phase change thermal storage system for regulating inlet air temperature for an exhaust heat boiler, comprising:
the phase change point of a heat storage material in the shell of the heat storage unit of the high-temperature phase change heat storage device is the upper limit temperature of the normal work of the boiler, the inlet of the high-temperature phase change heat storage device is communicated with an access pipe through a first pipeline, and the access pipe is communicated with a flue gas outlet of production equipment; an outlet of the high-temperature phase change heat storage device is communicated with an air inlet of the waste heat boiler through a second pipeline, a first electric valve and a second electric valve are respectively arranged on the first pipeline and the second pipeline, an inlet of the high-temperature phase change heat storage device is also communicated with a connecting pipe through a fifth pipeline, and the connecting pipe is communicated with the air inlet of the waste heat boiler; a fifth electric valve is arranged on the fifth pipeline,
the phase change point of a heat storage material in a shell of a heat storage unit of the low-temperature phase change heat storage device is the lower limit temperature of the normal work of a boiler, an outlet of the low-temperature phase change heat storage device is communicated with an outlet of a high-temperature phase change heat storage device through a seventh pipeline, an inlet of the low-temperature phase change heat storage device is communicated with an access pipe through a third pipeline, an outlet of the low-temperature phase change heat storage device is also communicated with an air inlet of a waste heat boiler through a fourth pipeline, a third electric valve and a fourth electric valve are respectively arranged on the third pipeline and the fourth pipeline, an inlet of the low-temperature phase change heat storage device is also communicated with a connecting pipe through a sixth pipeline, and a sixth electric valve is arranged on the sixth pipeline,
a temperature sensor arranged on the connecting pipe and used for detecting the temperature of the flue gas in the connecting pipe,
the processing module is used for receiving the smoke temperature value of the temperature sensor and comprises:
when the temperature of the flue gas is higher than the high-temperature preset temperature, sending a valve opening signal to a fifth electric valve and a third electric valve; the flue gas is cooled through the low-temperature phase-change heat storage device and then through the high-temperature phase-change heat storage device;
when the temperature of the flue gas is less than or equal to the low-temperature preset temperature, sending a valve opening signal to the first electric valve and the sixth electric valve; the flue gas is heated by the high-temperature phase-change heat storage device and then the low-temperature phase-change heat storage device;
when the temperature of the flue gas is in a low-temperature preset temperature and a high-temperature preset temperature range, sending valve opening signals to a first electric valve, a second electric valve, a third electric valve and a fourth electric valve; the flue gas is divided into two paths and respectively passes through the high-temperature phase change heat storage device and the low-temperature phase change heat storage device and then is collected into the waste heat boiler.
The utility model has the beneficial effects that: by the arrangement, the inlet flue gas temperature of the waste heat boiler is stable, and the heat efficiency of the system is high; the system is simple, the equipment is few, the industrial molten salt can be selected as the heat storage material according to the required flue gas temperature of the waste heat boiler, and the overall economy is high; frequent operation of other equipment of the system is reduced, and the running and maintenance cost of the system is reduced; the utility model stabilizes the temperature of the system flue gas, is beneficial to the operation of a boiler and a fan, reduces the frequent load adjustment operation of equipment and effectively reduces the operation and maintenance cost of the system.
Drawings
FIG. 1 is a side view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a schematic diagram of the system of the present invention.
Wherein: 1. a housing; 2. an inlet; 3. an outlet; 4. an access hole; 5. positioning holes; 6. a heat storage unit; 7. a housing; 8. a heat storage material; 9. a high temperature phase change heat storage device; 10. a first conduit; 11. a second conduit; 12. a first electrically operated valve; 13. a second electrically operated valve; 14. a fifth pipeline; 15. a fifth electrically operated valve; 16. a low temperature phase change heat storage device; 17. a seventh pipe; 18. a third pipeline; 19. an access pipe; 20. a third electrically operated valve; 21. a sixth electrically operated valve; 22. a fourth pipe; 23. a fourth electrically operated valve; 24. a temperature sensor; 25. a connecting pipe; 26. a waste heat boiler; 27. and a sixth pipeline.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The utility model discloses a phase change heat storage device for adjusting inlet air temperature of a waste heat boiler, which comprises a shell 1 and a heat storage unit 6, wherein the left end of the shell 1 is provided with an inlet 2, the right end of the shell 1 is provided with an outlet 3, the top of the shell 1 is provided with a plurality of stretching holes 4, the inlet 2 of the shell 1 is communicated with an air outlet of production equipment through a pipeline, the outlet 3 of the shell 1 is communicated with an air inlet of the waste heat boiler 26 through a pipeline, the inner wall of the bottom of the shell 1 is vertically provided with a plurality of positioning holes 5 with blind holes, and the axes of the positioning holes 5 and the corresponding stretching holes 4 are coincided.
The heat storage unit 6 is composed of a closed shell 7 and a heat storage material 8 contained in the shell 7, the lower end of the heat storage unit 6 sequentially penetrates through the stretching hole 4 and the inner cavity of the shell 1 from top to bottom and is fixed in the positioning hole 5, and the heat storage unit 6 is used for adjusting the temperature of smoke entering the inner cavity of the shell 1 through the heat storage material 8 located in the heat storage unit and then conveying the smoke to the waste heat boiler 26.
The stretching hole 4 is circular, the shell 7 is a hollow tubular structure, and heat storage materials 8 are contained in the tubular structure. The inserting hole 4 can also be in a strip shape, the shell 7 is in a hollow plate-shaped structure, the heat storage material 8 is contained in the plate-shaped structure, and when the phase-change heat storage device is used for realizing positive pressure of smoke, the smoke cannot leak, so that safety accidents are avoided. When the smoke gas operates at negative pressure, cold air can not be sucked, and the temperature of the smoke gas is prevented from being reduced.
The utility model utilizes the physical characteristic that latent heat is larger than sensible heat in the same temperature difference range to lead the fused salt to carry out a large amount of heat absorption or heat release work under the phase change temperature point so as to stabilize the temperature of the flue gas, thereby improving the heat efficiency of the system.
The utility model also discloses a phase change heat storage system for adjusting the inlet air temperature of the waste heat boiler, which comprises a high-temperature phase change heat storage device 9, a low-temperature phase change heat storage device 16, a temperature sensor 24, a processing module and a relevant electric valve thereof as shown in figure 3, wherein the phase change heat storage devices of the high-temperature phase change heat storage device 9 and the low-temperature phase change heat storage device 16 are both phase change heat storage devices in the utility model.
The phase change point of the heat storage material 8 in the shell 7 of the heat storage unit 6 of the high-temperature phase change heat storage device 9 is the upper limit temperature of the normal work of the boiler, the inlet 2 of the high-temperature phase change heat storage device 9 is communicated with the access pipe 19 through the first pipeline 10, and the access pipe 19 is communicated with the flue gas outlet of the production equipment; an outlet 3 of the high-temperature phase change heat storage device 9 is communicated with an air inlet of the waste heat boiler 26 through a second pipeline 11, a first electric valve 12 and a second electric valve 13 are respectively installed on a first pipeline 10 and the second pipeline 11, an inlet 2 of the high-temperature phase change heat storage device 9 is also communicated with a connecting pipe 25 through a fifth pipeline 14, and the connecting pipe 25 is communicated with the air inlet of the waste heat boiler 26; a fifth electric valve 15 is mounted on the fifth pipe 14.
The phase change point of the heat storage material 8 in the shell 7 of the heat storage unit 6 of the low-temperature phase change heat storage device 16 is the lower limit temperature of the normal work of the boiler, the outlet 3 of the low-temperature phase change heat storage device 16 is communicated with the outlet 3 of the high-temperature phase change heat storage device 9 through a seventh pipeline 17, the inlet 2 of the low-temperature phase change heat storage device 16 is communicated with an access pipe 19 through a third pipeline 18, and the access pipe 19 is communicated with a flue gas outlet of the production equipment; the outlet 3 of the low-temperature phase change heat storage device 16 is communicated with the air inlet of the waste heat boiler 26 through a fourth pipeline 22, a third electric valve 20 and a fourth electric valve 23 are respectively installed on the third pipeline 18 and the fourth pipeline 22, the inlet 2 of the low-temperature phase change heat storage device 16 is also communicated with a connecting pipe 25 through a sixth pipeline 27, and the connecting pipe 25 is communicated with the air inlet of the waste heat boiler 26; the sixth pipe 27 is provided with a sixth motor-operated valve 21.
The temperature sensor 24 is installed on the connecting pipe 25, the temperature sensor 24 is used for detecting the temperature of the flue gas in the connecting pipe 25, the processing module is used for receiving the temperature value of the flue gas of the temperature sensor 24, calculating the temperature value of the flue gas when the temperature of the flue gas is higher than a high-temperature preset temperature, and sending valve closing signals to the second electric valve 13, the fourth electric valve 23, the fifth electric valve 15 and the sixth electric valve 21; and when the temperature of the flue gas is less than or equal to the low-temperature preset temperature, sending valve closing signals to the first electric valve 12, the third electric valve 20, the fourth electric valve 23 and the fifth electric valve 15.
The normal working temperature of the boiler in the utility model refers to the range value of the inlet flue gas temperature range of the boiler in working which can be accepted by a waste heat system. The high-temperature preset temperature is the upper limit temperature of the normal work of the boiler, the low-temperature preset temperature is the lower limit temperature of the normal work of the boiler, the phase change point of the heat storage material 8 selected by the high-temperature phase change heat storage device 9 is the upper limit temperature of the normal work of the boiler, and the phase change point of the heat storage material 8 selected by the low-temperature phase change heat storage device 16 is the lower limit temperature of the normal work of the boiler.
When the temperature of the flue gas in the connecting pipe 25 is not higher than the high-temperature preset temperature and not lower than the low-temperature preset temperature, the first electric valve 12, the second electric valve 13, the third electric valve 20 and the fourth electric valve 23 are opened, the fifth electric valve 15 and the sixth electric valve 21 are closed, the flue gas in the access pipe 19 is divided into two paths, one path enters the connecting pipe 25 through the third electric valve 20, the third pipeline 18, the low-temperature phase change heat storage device 16, the fourth electric valve 23 and the fourth pipeline 22, the other path enters the connecting pipe 25 through the first electric valve 12, the first pipeline 10, the high-temperature phase change heat storage device 9, the second electric valve 13 and the second pipeline 11, the two paths are converged and then enter the waste heat boiler 26 from the connecting pipe 25 and then flow out, wherein the temperature of the low-temperature heat storage phase change device 16 is higher than the phase change temperature point thereof, and the molten salt is in a liquid state; the temperature of the high-temperature phase-change heat storage device 9 is lower than the phase-change temperature point, and the molten salt is solid.
When the temperature of the flue gas in the connecting pipe 25 is higher than the high-temperature preset temperature, the fifth electric valve 15 and the third electric valve 20 are opened, the first electric valve 12, the second electric valve 13, the sixth electric valve 21 and the fourth electric valve 23 are closed, the flue gas sequentially passes through the third electric valve 20, the third pipeline 18, the low-temperature phase change heat storage device 16, the seventh pipeline 17, the high-temperature phase change heat storage device 9, the first pipeline 10, the fifth pipeline 14, the fifth electric valve 15 and the connecting pipe 25 from the access pipe 19 and enters the waste heat boiler 26, the temperature of the low-temperature phase change heat storage device 16 in the passage is higher than the phase change temperature point of the flue gas, and the molten salt is in a liquid state; the temperature of the high-temperature phase-change heat storage device 9 is in the range near the phase-change temperature, and the molten salt is in a solid state or a liquid state. The smoke absorbs heat through the low-temperature phase change heat storage device 16 and the high-temperature phase change heat storage device 9, and the temperature of the smoke is reduced to be lower than or equal to the high-temperature preset temperature, so that the normal work of the waste heat boiler 26 is ensured.
When the temperature of the flue gas in the connecting pipe 25 is lower than the low-temperature preset temperature, the first electric valve 12 and the sixth electric valve 21 are opened, the second electric valve 13, the fifth electric valve 15, the third electric valve 20 and the fourth electric valve 23 are closed, and the flue gas sequentially passes through the first electric valve 12, the first pipeline 10, the high-temperature phase change heat storage device 9, the seventh pipeline 17, the low-temperature phase change heat storage device 16, the third pipeline 18, the sixth pipeline 27, the sixth electric valve 21 and the connecting pipe 25 from the connecting pipe 19 and enters the waste heat boiler 26. The temperature of the low-temperature phase-change heat storage device 16 is in the range near the phase-change temperature, and the molten salt is in a liquid state or a solid state; the temperature of the high-temperature phase-change heat storage device 9 is lower than the phase-change temperature point, and the molten salt is solid. The smoke is released through the low-temperature phase change heat storage device 16 and the high-temperature phase change heat storage device 9, and the temperature of the smoke is raised to be higher than or equal to the low-temperature preset temperature, so that the normal work of the waste heat boiler 26 is ensured.
When the temperature of the waste heat flue gas at the system inlet 2 is often lower than the normal working lower limit temperature of the waste heat boiler 26, the molten salt phase change heat storage unit 6 with the phase change point being the normal working lower limit temperature of the waste heat boiler 26 is adopted. During normal operation, the fused salt in the phase change heat storage unit 6 is liquid, and when the temperature of the flue gas at the inlet 2 of the system is reduced and fluctuated, the liquid fused salt emits a large amount of heat to heat the flue gas until the fused salt is changed from liquid to solid, and the flue gas always enters the waste heat boiler 26 at a more stable temperature. When the temperature of the flue gas at the inlet 2 is recovered from a lower temperature to a normal temperature, the molten salt begins to absorb heat again until the molten salt is changed into a liquid state. During this operation, the exhaust-heat boiler 26 is always operated at normal operating temperature, and the production conditions are stable.
When the temperature of the waste heat flue gas at the inlet 2 of the system is often higher than the upper limit temperature of the normal operation of the waste heat boiler 26, the fused salt phase change heat storage unit 6 with the phase change point being the upper limit temperature of the normal operation of the waste heat boiler 26 is adopted. During normal operation, the fused salt in the phase change heat storage unit 6 is solid, and when the flue gas temperature of the system inlet 2 increased and fluctuated, the solid fused salt absorbed a large amount of heat and cooled the flue gas until the fused salt changed from solid to liquid, and the flue gas always entered the exhaust-heat boiler 26 at a more stable temperature. When the temperature of the flue gas at the inlet 2 is recovered from higher temperature to normal temperature, the fused salt begins to release heat again until the fused salt becomes solid. During this operation, the exhaust-heat boiler 26 is always operated at normal operating temperature, and the production conditions are stable.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a phase transition heat-retaining device for exhaust-heat boiler adjusts inlet air temperature which characterized in that includes:
the left end of the shell (1) is provided with an inlet (2), the right end of the shell is provided with an outlet (3), the top of the shell is provided with a plurality of stretching holes (4), the inlet (2) is communicated with a flue gas outlet of production equipment through a pipeline, the outlet (3) of the shell is communicated with an air inlet of a waste heat boiler (26) through a connecting pipe (25), the inner wall of the bottom of the shell is vertically provided with a plurality of positioning holes (5) with blind holes, and the axes of the positioning holes (5) and the corresponding stretching holes (4) are superposed,
the heat storage unit (6) is composed of a closed shell (7) and heat storage materials (8) contained in the shell (7), the lower end of the heat storage unit sequentially penetrates through the extending hole (4) and the inner cavity of the shell (1) from top to bottom and is fixed in the positioning hole (5), and the heat storage unit (6) is used for adjusting the temperature of smoke entering the inner cavity of the shell (1) by the heat storage materials (8) located in the heat storage unit and then conveying the smoke to the waste heat boiler (26).
2. The phase-change heat storage device for adjusting the inlet air temperature of a waste heat boiler as claimed in claim 1, characterized in that the access hole (4) is circular, the housing (7) is a hollow tubular structure, and the tubular structure contains the heat storage material (8).
3. The phase-change heat storage device for adjusting the inlet air temperature of a waste heat boiler according to claim 1, characterized in that the insertion hole (4) is in the shape of a strip, the housing (7) is in the shape of a hollow plate, and the heat storage material (8) is contained in the plate.
4. A phase change heat storage device for regulating the temperature of inlet air for a waste heat boiler according to any of claims 1-3, said heat storage material (8) being a molten salt.
5. A phase change heat storage system for adjusting the temperature of intake air for a waste heat boiler by using the phase change heat storage device as claimed in any one of claims 1 to 4, comprising:
the phase change point of a heat storage material (8) in a shell (7) of a heat storage unit (6) of the high-temperature phase change heat storage device (9) is the upper limit temperature of the normal work of the boiler, an inlet (2) of the high-temperature phase change heat storage device is communicated with an access pipe (19) through a first pipeline (10), and the access pipe (19) is communicated with a flue gas outlet of production equipment; an outlet (3) of the high-temperature phase change heat storage device (9) is communicated with an air inlet of a waste heat boiler (26) through a second pipeline (11), a first electric valve (12) and a second electric valve (13) are respectively installed on the first pipeline (10) and the second pipeline (11), an inlet (2) of the high-temperature phase change heat storage device (9) is further communicated with a connecting pipe (25) through a fifth pipeline (14), and the connecting pipe (25) is communicated with the air inlet of the waste heat boiler (26); a fifth electric valve (15) is arranged on the fifth pipeline (14),
the phase change point of a heat storage material (8) in a shell (7) of a heat storage unit (6) of the low-temperature phase change heat storage device (16) is the lower limit temperature of the normal work of a boiler, an outlet (3) of the low-temperature phase change heat storage device (16) is communicated with an outlet (3) of a high-temperature phase change heat storage device (9) through a seventh pipeline (17), an inlet (2) of the low-temperature phase change heat storage device (16) is communicated with an access pipe (19) through a third pipeline (18), an outlet (3) of the low-temperature phase change heat storage device (16) is communicated with an air inlet of a waste heat boiler (26) through a fourth pipeline (22), a third electric valve (20) and a fourth electric valve (23) are respectively installed on the third pipeline (18) and the fourth pipeline (22), an inlet (2) of the low-temperature phase change heat storage device (16) is also communicated with a connecting pipe (25) through a sixth pipeline (27), a sixth electric valve (21) is arranged on the sixth pipeline (27),
a temperature sensor (24) mounted on the connecting pipe (25) for detecting the temperature of the flue gas in the connecting pipe (25),
a processing module for receiving a flue gas temperature value of the temperature sensor (24) and:
when the temperature of the flue gas is higher than the high-temperature preset temperature, a valve opening signal is sent to the fifth electric valve (15) and the third electric valve (20); the flue gas firstly passes through the low-temperature phase-change heat storage device (16) and then passes through the high-temperature phase-change heat storage device (9) to cool the flue gas;
when the temperature of the flue gas is less than or equal to the low-temperature preset temperature, sending a valve opening signal to the first electric valve (12) and the sixth electric valve (21); the smoke is heated through the high-temperature phase-change heat storage device (9) and then through the low-temperature phase-change heat storage device (16);
when the temperature of the flue gas is in a low-temperature preset temperature and a high-temperature preset temperature interval, sending valve opening signals to the first electric valve (12), the second electric valve (13), the third electric valve (20) and the fourth electric valve (23); the flue gas is divided into two paths and respectively passes through the high-temperature phase change heat storage device (9) and the low-temperature phase change heat storage device (16) and then is collected into the waste heat boiler (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123383585.4U CN216745643U (en) | 2021-12-30 | 2021-12-30 | Phase change heat storage device and system for adjusting inlet air temperature of waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123383585.4U CN216745643U (en) | 2021-12-30 | 2021-12-30 | Phase change heat storage device and system for adjusting inlet air temperature of waste heat boiler |
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| CN216745643U true CN216745643U (en) | 2022-06-14 |
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| CN202123383585.4U Active CN216745643U (en) | 2021-12-30 | 2021-12-30 | Phase change heat storage device and system for adjusting inlet air temperature of waste heat boiler |
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| CN (1) | CN216745643U (en) |
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2021
- 2021-12-30 CN CN202123383585.4U patent/CN216745643U/en active Active
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