CN220230207U - Multistage heat energy utilization system with flash steam heat energy recovery - Google Patents
Multistage heat energy utilization system with flash steam heat energy recovery Download PDFInfo
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- CN220230207U CN220230207U CN202321963315.7U CN202321963315U CN220230207U CN 220230207 U CN220230207 U CN 220230207U CN 202321963315 U CN202321963315 U CN 202321963315U CN 220230207 U CN220230207 U CN 220230207U
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- 238000011084 recovery Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 121
- 238000004146 energy storage Methods 0.000 claims abstract description 39
- 230000005514 two-phase flow Effects 0.000 claims abstract description 31
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 17
- 239000007788 liquid Substances 0.000 abstract description 7
- 235000013405 beer Nutrition 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000007599 discharging Methods 0.000 abstract description 3
- 239000002918 waste heat Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model provides a multi-section heat energy utilization system with flash steam heat energy recovery, which comprises: the device comprises a two-phase flow heat exchanger, a first heat energy utilization section, a second heat energy utilization section, a third heat energy utilization section and a fourth heat energy utilization section. The first heat energy utilization section exchanges heat with low-temperature liquid storage in the energy storage tank through the two-phase flow heat exchanger, the second heat energy utilization section exchanges heat with process water through heat of high-temperature energy storage liquid in the high-temperature energy storage tank, the third heat energy utilization section exchanges heat with RO water through flash steam generated by utilizing the condensate water collecting tank, utilization of flash heat energy is achieved, meanwhile, after heat exchange, the flash steam is vaporized and condensed and then becomes condensate water to flow back to the condensate water collecting tank, the phenomenon of discharging the flash steam is effectively eliminated, the fourth heat energy utilization section exchanges heat with the cold water through heat of the condensate water collecting tank, waste heat of the flash steam is recycled, heat energy of the flash steam is fully utilized, and water demands of various different process sections in beer production are met.
Description
Technical Field
The utility model belongs to the technical field of heat energy recovery, and particularly relates to a multi-section heat energy utilization system with flash steam heat energy recovery.
Background
The saccharification process of beer is the process with the greatest heat consumption in the beer production process. At present, the recovery of heat energy is only concentrated on a boiling pot, namely, the heat energy of secondary flash evaporation steam is recovered by an energy storage method through the generation of secondary steam generated in the wort boiling process, but the recovery of heat energy of other heat utilization equipment such as a saccharification pot, a gelatinization pot and the like is insufficient.
Saturated high-temperature condensed water generated after vapor emits vaporization latent heat in saccharification process equipment (a gelatinization pot, a saccharification pot and the like) and secondary vapor generated by flash evaporation under certain conditions have extremely high recycling value. However, due to the lack of a related heat energy recovery method, the recovery and utilization rate of high-temperature condensed water and flash steam generated by saccharification process equipment is generally low, so that a certain heat source is wasted, and in addition, most of beer enterprises directly discharge the flash steam into outdoor atmosphere, so that not only is great heat energy loss caused, but also serious heat pollution is caused to the surrounding environment.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a multi-section heat energy utilization system with flash steam heat energy recovery, which solves the problem of heat energy waste in the prior art.
One embodiment of the present utility model provides a multi-stage thermal energy utilization system with flash vapor thermal energy recovery, comprising:
the two-phase flow heat exchanger is connected with a condensed water collecting tank;
the first heat energy utilization section is connected with the two-phase flow heat exchanger;
the second heat energy utilization section is connected with the first heat energy utilization section;
the third heat energy utilization section is connected with the condensed water collection tank;
and the fourth heat energy utilization section is connected with the condensed water collection tank.
In one of the embodiments of the present utility model,
the two-phase flow heat exchanger is connected with a drain valve through a pipeline, a stop valve is arranged on the pipeline between the drain valve and the two-phase flow heat exchanger, and the drain valve is connected with a high-temperature condensate water pipeline.
In one of the embodiments of the present utility model,
the first heat energy utilization section includes:
the high-temperature heat energy storage tank is connected with the two-phase flow heat exchanger through a pipeline, and the pipeline is provided with a regulating valve;
the low-temperature heat energy storage tank is connected with the two-phase flow heat exchanger through a pipeline, a centrifugal booster pump is arranged on the pipeline, the low-temperature heat energy storage tank is connected with the high-temperature heat energy storage tank through a pipeline, and a stop valve is arranged on the pipeline at the joint.
In one of the embodiments of the present utility model,
the second heat energy utilization section includes:
the first heat exchanger is connected with the high-temperature heat energy storage tank through a pipeline, and a centrifugal booster pump is arranged on the pipeline between the first heat exchanger and the high-temperature heat energy storage tank.
In one of the embodiments of the present utility model,
the third heat energy utilization section includes:
the first-stage flash steam condenser is provided with a second flash steam inlet, a first outlet, a flash steam outlet and a first RO water inlet, the second flash steam inlet is connected with the condensed water collecting tank, and the first outlet is provided with a temperature sensor and a flow regulating valve;
the second-stage flash steam condenser is provided with a first flash steam inlet, a second RO water inlet, an RO water outlet and a second outlet, the flash steam inlet is connected with the flash steam outlet, and the RO water outlet is connected with the first RO water inlet;
the warm water storage tank is connected with the first outlet and the condensed water collection tank;
the first-stage flash steam condenser and the second-stage flash steam condenser are respectively provided with a condensed water outlet, and the condensed water outlets are connected with a condensed water collecting tank.
In one of the embodiments of the present utility model,
the primary flash steam condenser and the secondary flash steam condenser are both single-pass tube type heat exchangers and are used for cooling and condensing the secondary flash steam formed in the condensed water collecting tank and recovering heat carried by the secondary flash steam.
In one of the embodiments of the present utility model,
the heat exchange area of the secondary flash steam condenser is larger than that of the primary flash steam condenser.
In one of the embodiments of the present utility model,
the fourth heat energy utilization section includes:
the second heat exchanger is connected with the condensed water collecting tank through a pipeline, and a centrifugal booster pump is arranged on the pipeline;
the raw water storage tank is connected with the heat exchanger.
The multi-section type heat energy utilization system provided by the embodiment has the following beneficial effects:
the first heat energy utilization section exchanges heat with low-temperature liquid storage in the energy storage tank through the two-phase flow heat exchanger, the second heat energy utilization section exchanges heat with process water through heat of high-temperature energy storage liquid in the high-temperature energy storage tank, the third heat energy utilization section exchanges heat with normal-temperature RO water through flash steam generated by utilizing the condensed water collection tank, the flash steam is vaporized and condensed after heat exchange to become condensed water to flow back into the condensed water collection tank, the phenomenon of discharging flash steam is effectively eliminated, and the fourth heat energy utilization section exchanges heat with cold water through heat of the condensed water collection tank. The multi-section type heat energy utilization system not only recycles the waste heat of the flash steam, but also fully utilizes the heat energy of the flash steam, and meets the water demands of various different process sections in beer production.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic structural view of the first heat energy utilization section of FIG. 1;
FIG. 3 is a schematic view of the second heat energy utilization section of FIG. 1;
FIG. 4 is a schematic structural view of the third heat energy utilization section of FIG. 1;
FIG. 5 is a schematic structural view of the fourth heat energy utilization section of FIG. 1;
in the figure: 100. a thermal energy utilization system; 101. a drain valve; 102. a stop valve; 103. a regulating valve; 104. a centrifugal booster pump;
110. a two-phase flow heat exchanger; 111. a condensed water collection tank;
120. a first heat energy utilization section; 121. a high-temperature heat energy storage tank; 122. a low temperature heat energy storage tank;
130. a second heat energy utilization section; 131. a first heat exchanger;
140. a third heat energy utilization section; 141. a primary flash condenser; 1411. a second flash vapor inlet; 1412. a first outlet; 1413. a flash vapor outlet; 1414. a first RO water inlet; 142. a second stage flash vapor condenser; 1421. a first flash steam inlet; 1422. a second RO water inlet; 1423. an RO water outlet; 1424. a second outlet; 143. a warm water storage tank; 144. a condensed water outlet;
150. a fourth heat energy utilization section; 151. a second heat exchanger; 152. a raw water storage tank.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is involved in the embodiment of the present utility model, the directional indication is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional indication is correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B "including a scheme, or B scheme, or a scheme where a and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
Referring to fig. 1, one embodiment of the present utility model provides a multi-stage thermal energy utilization system 100 with flash vapor thermal energy recovery, comprising:
a two-phase flow heat exchanger 110, wherein the two-phase flow heat exchanger 110 is connected with a condensed water collection tank 111;
a first heat energy utilization section 120, the first heat energy utilization section 120 being connected to the two-phase flow heat exchanger 110;
a second heat energy utilization section 130, the second heat energy utilization section 130 being connected to the first heat energy utilization section 120;
a third heat energy utilization section 140, the third heat energy utilization section 140 being connected to the condensed water collection tank 111;
a fourth heat energy utilization section 150, the fourth heat energy utilization section 150 being connected to the condensed water collection tank 111.
The multi-stage heat energy utilization system 100 provided in the above embodiment has the following advantages:
the first heat energy utilization section 120 exchanges heat with the low-temperature liquid storage in the energy storage tank through the two-phase flow heat exchanger 110, the second heat energy utilization section 130 exchanges heat with the process water through the heat of the high-temperature energy storage liquid in the high-temperature energy storage tank, the third heat energy utilization section 140 exchanges heat with normal-temperature RO water through flash steam generated by utilizing the condensed water collection tank 111, so that the utilization of flash heat energy is realized, meanwhile, the condensed water is reduced to enter the collection tank to generate flash steam, the discharge of condensed water flash steam is eliminated, and the fourth heat energy utilization section 150 exchanges heat with cold water through the heat of the condensed water collection tank 111. The multi-section heat energy utilization method and the system thereof not only fully utilize the heat energy, but also meet the water use requirements of various different process sections in beer production.
It should be noted that, the two-phase flow heat exchanger 110 adopts a plate shell type heat exchanger, and compared with a conventional plate type heat exchanger and a shell-and-tube heat exchanger, the plate shell type heat exchanger has higher heat exchange efficiency, does not need gasket sealing of the plate type heat exchanger, and can be suitable for working conditions such as high temperature, high pressure and the like.
Referring to fig. 1, in one embodiment,
the two-phase flow heat exchanger 110 is connected with a drain valve 101 through a pipeline, a stop valve 102 is arranged on the pipeline between the drain valve 101 and the two-phase flow heat exchanger 110, and the drain valve 101 is connected with a high-temperature condensate water pipeline.
In this embodiment, high-temperature condensed water above 130 ℃ is collected by the drain valve 101, after passing through the drain valve 101, the pressure of the condensed water is reduced, the temperature is also reduced to 100 ℃ and flash steam is generated, the flash steam and the high-temperature condensed water enter the two-phase flow heat exchanger 110 together for heat exchange, and a stop valve 102 is arranged between the drain valve 101 and a pipeline of the two-phase flow heat exchanger 110 and used for controlling the flow of the high-temperature condensed water entering the two-phase flow heat exchanger 110.
Referring to fig. 1 and 2, in one embodiment,
the first heat energy utilization section 120 includes:
the high-temperature heat energy storage tank 121 is connected with the two-phase flow heat exchanger 110 through a pipeline, and the pipeline is provided with a regulating valve 103;
the low-temperature heat energy storage tank 122, the low-temperature heat energy storage tank 122 is connected with the two-phase flow heat exchanger 110 through a pipeline, the centrifugal booster pump 104 is arranged on the pipeline, the low-temperature heat energy storage tank 122 is connected with the high-temperature heat energy storage tank 121 through a pipeline, and the pipeline at the joint is provided with the stop valve 102.
In the present embodiment, the high-temperature heat energy storage tank 121 and the low-temperature heat energy storage tank 122 are connected (the same as the principle of the communicating vessel, the water level of the low-temperature heat energy storage tank 122 is supplemented by the stop valve 102), and are connected with the two-phase flow heat exchanger 110; when the wort needs to be preheated by the energy-storing water, the centrifugal booster pump 104 pumps the energy-storing water of about 85 ℃ of the low-temperature heat energy storage tank 122 to the two-phase flow heat exchanger 110 for heat exchange, meanwhile, the stop valve 102 is opened, the high-temperature condensed water with flash steam flows into the two-phase flow heat exchanger 110 for heat exchange with the low-temperature energy-storing water, the temperature is controlled by the regulating valve 103, and the energy-storing water can reach 95 ℃ after heat exchange and flows into the high-temperature heat energy storage tank 121.
Referring to fig. 1 and 3, in one embodiment,
the second heat energy utilization section 130 includes:
the first heat exchanger 131 is connected with the high-temperature heat energy storage tank 121 through a pipeline, and a centrifugal booster pump 104 is arranged on the pipeline between the first heat exchanger 131 and the high-temperature heat energy storage tank 121.
In this embodiment, the energy storage liquid in the high-temperature heat energy storage tank 121 is pumped to the first heat exchanger 131 to exchange heat with the process water by the centrifugal booster pump 104.
It should be noted that, the first heat exchanger 131 may be a conventional heat exchange device such as a plate heat exchanger, a plate shell heat exchanger, or a shell heat exchanger, and the heat of the high-temperature heat energy storage tank 121 passes through the first heat exchanger 131 to heat the low-temperature process water to a high temperature, so as to meet the process production requirement.
Referring to fig. 1 and 4, in one embodiment,
the third heat energy utilization section 140 includes:
a first-stage flash steam condenser 141, wherein a second flash steam inlet 1411, a first outlet 1412, a flash steam outlet 1413 and a first RO water inlet 1414 are formed in the first-stage flash steam condenser 141, the second flash steam inlet 1411 is connected with the condensed water collection tank 111, and a temperature sensor and a flow regulating valve 103 are arranged at the first outlet 1412;
a second-stage flash steam condenser 142, wherein a first flash steam inlet 1421, a second RO water inlet 1422, an RO water outlet 1423 and a second outlet 1424 are formed in the second-stage flash steam condenser 142, the flash steam inlet is connected with the flash steam outlet 1413, and the RO water outlet 1423 is connected with the first RO water inlet 1414;
a warm water storage tank 143, the warm water storage tank 143 being connected to the first outlet 1412 and the condensed water collection tank 111;
wherein, the first-stage flash steam condenser 141 and the second-stage flash steam condenser 142 are provided with a condensed water outlet 144, and the condensed water outlet 144 is connected with the condensed water collecting tank 111.
In this embodiment, the primary flash vapor condenser 141 and the secondary flash vapor condenser 142 are single-pass tube type heat exchangers, and are installed above the condensed water collection tank 111, and are used for cooling and condensing the secondary flash vapor formed in the condensed water collection tank 111, and recovering the heat carried by the secondary flash vapor. The secondary steam passes through the shell pass and the cooling water passes through the tube pass. The heat exchange area of the secondary flash steam condenser 142 is 3 times that of the primary flash steam condenser 141. In the primary flash steam condenser 141, the flow rate of the secondary steam is high, the heat exchange efficiency is high, and most of the steam can be condensed. The secondary flash steam condenser 142 has large diameter and low flow speed, and can effectively realize thorough condensation of steam and cooling of non-condensable gas. The two-stage steam condenser is adopted, so that the large-size and multi-shell-pass design caused by the adoption of a single condenser is avoided, the manufacturing and mounting difficulties are reduced, and the requirements of different discharge amounts are met by adopting different condenser combinations. The outlet of the primary flash steam condenser 141 is provided with a temperature sensor and a flow regulating valve 103, and the temperature sensor is used for measuring the temperature of the stored energy water after passing through the condensed water heat exchanger. The flow regulating valve 103 is used for regulating the flow of the stored water, and the opening of the regulating valve 103 is controlled by a set temperature. The two-stage flash steam condenser is provided with a one-way valve for preventing secondary steam from flowing backwards; there are non-condensed and newly formed flash steam and high-temperature non-condensed gases in the condensed water collecting tank 111, the gases enter the primary flash steam condenser 141 and the secondary flash steam condenser 142 from the exhaust pipe of the collecting tank, the water steam is condensed, and meanwhile, after heat exchange, the flash steam is vaporized and condensed to become condensed water to flow back to the condensed water collecting tank 111, so that the phenomenon of discharging the flash steam is effectively eliminated. The noncondensable gas is discharged from the exhaust port after being cooled. The RO water on the cold side of the flash steam condenser passes through the second-stage flash steam condenser 142 and the first-stage condenser in sequence, and after being heated to 90 ℃, the RO water outlet 1423 is opened to adjust the valve 103, and the hot RO water is conveyed to a steam temperature reducing device to be used as temperature reducing water, and the heat carried by the hot RO water is also returned to steam. The RO water heated using the flash steam condenser is safer than the RO water heated directly using steam condensate as the desuperheating water.
It should be noted that, the heat exchange area of the second-stage flash vapor condenser is greater than that of the first-stage flash vapor condenser, and in this embodiment, the most preferred scheme is that the heat exchange area of the second-stage flash vapor condenser is three times that of the first-stage flash vapor condenser.
Referring to fig. 1 and 5, in one embodiment,
the fourth heat energy utilization section 150 includes:
the second heat exchanger 151 is connected with the condensed water collection tank 111 through a pipeline, and a centrifugal booster pump 104 is arranged on the pipeline;
a raw water storage tank 152, the raw water storage tank 152 being connected to the heat exchanger.
In the present embodiment, the heat of condensed water in the condensed water collection tank 111 is utilized to heat the cold water in the raw water storage tank 152 by the heat exchanger, thereby realizing the recovery and utilization of heat energy.
It should be noted that the second heat exchanger 151 may be a conventional heat exchange device such as a plate heat exchanger, a plate shell heat exchanger, or a shell-and-tube heat exchanger.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (8)
1. A multi-stage thermal energy utilization system with flash vapor thermal energy recovery, comprising:
the two-phase flow heat exchanger is connected with a condensed water collecting tank;
the first heat energy utilization section is connected with the two-phase flow heat exchanger;
the second heat energy utilization section is connected with the first heat energy utilization section;
the third heat energy utilization section is connected with the condensed water collection tank;
and the fourth heat energy utilization section is connected with the condensed water collection tank.
2. A multi-stage thermal energy utilization system with flash vapor thermal energy recovery as defined in claim 1,
the two-phase flow heat exchanger is connected with a drain valve through a pipeline, a stop valve is arranged on the pipeline between the drain valve and the two-phase flow heat exchanger, and the drain valve is connected with a high-temperature condensate water pipeline.
3. A multi-stage thermal energy utilization system with flash vapor thermal energy recovery as defined in claim 1,
the first heat energy utilization section includes:
the high-temperature heat energy storage tank is connected with the two-phase flow heat exchanger through a pipeline, and the pipeline is provided with a regulating valve;
the low-temperature heat energy storage tank is connected with the two-phase flow heat exchanger through a pipeline, a centrifugal booster pump is arranged on the pipeline, the low-temperature heat energy storage tank is connected with the high-temperature heat energy storage tank through a pipeline, and a stop valve is arranged on the pipeline at the joint.
4. A multi-stage thermal energy utilization system with flash vapor thermal energy recovery as defined in claim 3,
the second heat energy utilization section includes:
the first heat exchanger is connected with the high-temperature heat energy storage tank through a pipeline, and a centrifugal booster pump is arranged on the pipeline between the first heat exchanger and the high-temperature heat energy storage tank.
5. A multi-stage thermal energy utilization system with flash vapor thermal energy recovery as defined in claim 1,
the third heat energy utilization section includes:
the first-stage flash steam condenser is provided with a second flash steam inlet, a first outlet, a flash steam outlet and a first RO water inlet, the second flash steam inlet is connected with the condensed water collecting tank, and the first outlet is provided with a temperature sensor and a flow regulating valve;
the second-stage flash steam condenser is provided with a first flash steam inlet, a second RO water inlet, an RO water outlet and a second outlet, the flash steam inlet is connected with the flash steam outlet, and the RO water outlet is connected with the first RO water inlet;
the warm water storage tank is connected with the first outlet and the condensed water collection tank;
the first-stage flash steam condenser and the second-stage flash steam condenser are respectively provided with a condensed water outlet, and the condensed water outlets are connected with a condensed water collecting tank.
6. A multi-stage thermal energy utilization system with flash vapor thermal energy recovery as defined in claim 5,
the primary flash steam condenser and the secondary flash steam condenser are both single-pass tube type heat exchangers and are used for cooling and condensing the secondary flash steam formed in the condensed water collecting tank and recovering heat carried by the secondary flash steam.
7. A multi-stage thermal energy utilization system with flash vapor thermal energy recovery as defined in claim 5,
the heat exchange area of the secondary flash steam condenser is larger than that of the primary flash steam condenser.
8. A multi-stage thermal energy utilization system with flash vapor thermal energy recovery as defined in claim 1,
the fourth heat energy utilization section includes:
the second heat exchanger is connected with the condensed water collecting tank through a pipeline, and a centrifugal booster pump is arranged on the pipeline;
the raw water storage tank is connected with the heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321963315.7U CN220230207U (en) | 2023-07-25 | 2023-07-25 | Multistage heat energy utilization system with flash steam heat energy recovery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321963315.7U CN220230207U (en) | 2023-07-25 | 2023-07-25 | Multistage heat energy utilization system with flash steam heat energy recovery |
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| CN220230207U true CN220230207U (en) | 2023-12-22 |
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| CN202321963315.7U Active CN220230207U (en) | 2023-07-25 | 2023-07-25 | Multistage heat energy utilization system with flash steam heat energy recovery |
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- 2023-07-25 CN CN202321963315.7U patent/CN220230207U/en active Active
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