CN115818751A - Waste heat recycling method for miscellaneous salt mother liquor drying device - Google Patents
Waste heat recycling method for miscellaneous salt mother liquor drying device Download PDFInfo
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- CN115818751A CN115818751A CN202211558146.9A CN202211558146A CN115818751A CN 115818751 A CN115818751 A CN 115818751A CN 202211558146 A CN202211558146 A CN 202211558146A CN 115818751 A CN115818751 A CN 115818751A
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- temperature heat
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- water side
- drying device
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- 150000003839 salts Chemical class 0.000 title claims abstract description 70
- 239000012452 mother liquor Substances 0.000 title claims abstract description 67
- 238000001035 drying Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002918 waste heat Substances 0.000 title claims abstract description 24
- 238000004064 recycling Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 176
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 32
- 239000000498 cooling water Substances 0.000 claims abstract description 26
- 238000001704 evaporation Methods 0.000 claims abstract description 20
- 230000008020 evaporation Effects 0.000 claims abstract description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 description 10
- 230000017525 heat dissipation Effects 0.000 description 8
- 238000011084 recovery Methods 0.000 description 8
- 238000002425 crystallisation Methods 0.000 description 6
- 230000008025 crystallization Effects 0.000 description 6
- 239000007791 liquid phase Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Drying Of Solid Materials (AREA)
Abstract
The invention provides a waste heat recycling method of a miscellaneous salt mother liquor drying device, which comprises the following steps: s101, conveying the circulating cooling water of the miscellaneous salt mother liquor drying device to the cold water side of a high-temperature heat pump; s201, the high-temperature heat pump works to convey heat on the cold water side of the high-temperature heat pump to the hot water side; s301, the high-temperature heat pump circulating water absorbs heat at the hot water side, is conveyed to an intermediate water tank and is conveyed to the cold water side of the ultra-high-temperature heat pump by the intermediate water tank to release heat; s401, the ultra-high temperature heat pump does work and conveys heat on the cold water side of the ultra-high temperature heat pump to the hot water side; s501, after absorbing heat at the hot water side of the ultra-high temperature heat pump, the circulating water of the ultra-high temperature heat pump is conveyed to a flash tank, and low-grade saturated steam is generated through flash evaporation; s601, conveying the low-grade saturated steam generated in the S501 to a steam compressor, and converting the low-grade saturated steam into high-grade saturated steam; and S701, conveying the high-grade saturated steam to a miscellaneous salt mother liquor drying device, releasing latent heat for evaporation of water in the miscellaneous salt mother liquor, condensing the latent heat into condensate water, and conveying the condensate water back to a flash evaporation tank.
Description
Technical Field
The invention mainly relates to the field of wastewater treatment, in particular to a waste heat recycling method of a miscellaneous salt mother liquor drying device.
Background
With the further enhancement of the national policy of energy conservation and emission reduction, the improvement of the comprehensive utilization efficiency of energy is concerned by people. In recent years, wastewater discharged in the production process of enterprises in the industries of coal chemical industry, petrochemical industry, fine chemical industry, metallurgy, pharmacy, printing and dyeing and the like is treated by adopting a zero-emission process. The 'zero discharge' water treatment process mainly comprises 3 main treatment processes of pretreatment, advanced treatment, concentrated water evaporation crystallization and the like, wherein the common treatment processes of concentrated water evaporation crystallization are multi-effect evaporation crystallization and MVR evaporation crystallization. No matter the multi-effect evaporation crystallization process or the MVR evaporation crystallization process is adopted, a certain amount of mixed salt mother liquor is discharged when sodium chloride or sodium sulfate crystallized salt products meeting the requirements are produced. The miscellaneous salt mother liquor is dried by a drying device, and the produced miscellaneous salt solid is transported to a third party for harmless treatment, thereby realizing real 'zero emission' of the wastewater. But simultaneously, a large amount of steam and circulating cooling water are consumed in the drying process of the miscellaneous salt mother liquor, and according to the heat balance relation, the input steam heat is finally transferred to the natural environment through the circulating cooling water, so that not only is the energy waste caused, but also higher operation cost is brought to enterprises.
Therefore, the invention is especially provided.
Disclosure of Invention
The invention aims to provide a waste heat recycling system of a miscellaneous salt mother liquor drying device, which solves the problems of high energy consumption, high operation cost and the like in the operation process of the miscellaneous salt mother liquor drying device, realizes the cyclic utilization of energy and reduces the production operation pressure of enterprises.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a waste heat recycling method of a miscellaneous salt mother liquor drying device, which comprises the following steps:
s101, conveying the circulating cooling water of the mixed salt mother liquor drying device to the cold water side of a high-temperature heat pump, and discharging heat to form circulating cooling water return water of the mixed salt mother liquor drying device;
s201, the high-temperature heat pump works to convey heat on the cold water side of the high-temperature heat pump to the hot water side of the high-temperature heat pump;
s301, the high-temperature heat pump circulating water absorbs heat at the hot water side of the high-temperature heat pump and is conveyed to an intermediate water tank, and the high-temperature heat pump circulating water is conveyed to the cold water side of the ultra-high-temperature heat pump by the intermediate water tank to release heat and then returns to the intermediate water tank;
s401, the ultra-high temperature heat pump does work, and heat on the cold water side of the ultra-high temperature heat pump is conveyed to the hot water side of the ultra-high temperature heat pump;
s501, conveying circulating water of the ultra-high temperature heat pump to a flash tank after absorbing heat at a hot water side of the ultra-high temperature heat pump, and generating low-grade saturated steam through flash evaporation;
s601, conveying the low-grade saturated steam generated in the S501 to a steam compressor, and performing work through the steam compressor to convert the low-grade saturated steam into high-grade saturated steam;
and S701, conveying the high-grade saturated steam to a miscellaneous salt mother liquor drying device, releasing latent heat for evaporation of water in the miscellaneous salt mother liquor, condensing the latent heat into condensate water, and conveying the condensate water back to a flash evaporation tank.
Preferably or optionally, the total energy efficiency ratio of the high-temperature heat pump and the ultra-high-temperature heat pump is not less than 1.7.
Preferably or optionally, the temperature difference of the inlet water and the outlet water of the cold water side and the hot water side of the high-temperature heat pump is 5-10 ℃.
Preferably or optionally, the temperature difference between the inlet water and the outlet water of the cold water side and the hot water side of the ultra-high temperature heat pump is 5-10 ℃.
Preferably or optionally, the vapor compressor is a screw vapor compressor.
Preferably or alternatively, the screw vapor compressor has a temperature rise of 30 to 60 ℃.
Preferably or optionally, the water quality of the circulating water on the hot water side of the high-temperature heat pump, the cold water side of the ultra-high-temperature heat pump and the hot water side of the ultra-high-temperature heat pump meets the following requirements: the conductivity is less than or equal to 0.3 mu s/cm, the content of silicon dioxide is less than or equal to 20 mu g/L, and the hardness is approximately equal to 0 mu mol/L.
Preferably or alternatively, the low-grade saturated steam has a temperature of 90 to 120 ℃ and an absolute pressure of 70.2 to 198.7kPa.
Preferably or optionally, the high-temperature heat pump and the ultrahigh-temperature heat pump are both water source heat pumps.
Advantageous effects
The waste heat recovery method of the miscellaneous salt mother liquor drying device provided by the invention realizes the recovery and cyclic utilization of the waste heat generated by the system in the miscellaneous salt mother liquor drying process, avoids energy waste, can greatly reduce the energy consumption of the system, and has the advantages of simple equipment, concise flow, convenience in operation, small occupied area and long-term stable operation.
Drawings
FIG. 1 is a schematic view of a waste heat recovery system of a miscellaneous salt mother liquor drying device in the second embodiment.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully and in detail with reference to the accompanying drawings and preferred experimental examples, but the scope of the present invention is not limited to the following specific examples.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
The first embodiment,
The embodiment of the invention provides a waste heat recovery method of a miscellaneous salt mother liquor drying device.
The waste heat recovery method of the miscellaneous salt mother liquor drying device is carried out according to the following steps:
circulating cooling water of the mixed salt mother liquor drying device with a certain temperature is conveyed to the cold water side of the high-temperature heat pump to release heat, and after heat release, circulating cooling water of the mixed salt mother liquor drying device is formed and returned to the mixed salt mother liquor drying device, and the circulating cooling water is conveyed to the mixed salt mother liquor drying device to be used for circulating cooling of the mixed salt mother liquor drying device.
After the high-temperature heat pump works, the heat on the cold water side of the high-temperature heat pump is conveyed to the hot water side of the high-temperature heat pump.
The high-temperature heat pump circulating water absorbs heat at the hot water side of the high-temperature heat pump and is then conveyed to the middle water tank, and the high-temperature heat pump circulating water is conveyed to the cold water side of the ultra-high-temperature heat pump by the middle water tank to release heat and then returns to the middle water tank.
After the ultra-high temperature heat pump works, heat on the cold water side of the ultra-high temperature heat pump is conveyed to the hot water side of the ultra-high temperature heat pump, circulating water on the ultra-high temperature heat pump absorbs heat on the hot water side of the ultra-high temperature heat pump and then is conveyed to the flash tank, and low-grade saturated steam is generated through the flash evaporation effect.
And the low-grade saturated steam is conveyed into a steam compressor, works by the steam compressor, further improves the temperature and the pressure, and is converted into high-grade saturated steam.
The high-grade saturated steam is conveyed to the mixed salt mother liquor drying device, latent heat is released in the mixed salt mother liquor drying device, and the heat is used for evaporating moisture in the mixed salt mother liquor. The high-grade saturated steam is condensed into condensed water after releasing latent heat, and is conveyed back to the flash tank.
In this embodiment, the cold water side of the high-temperature heat pump and the cooling water of the miscellaneous salt mother liquor drying device form a circulation loop, and the hot water side of the high-temperature heat pump and the intermediate water tank form a circulation loop; the cold water side of the ultra-high temperature heat pump and the intermediate water tank form a circulation loop; the hot water side of the ultra-high temperature heat pump and the flash tank form a circulation loop; the flash tank and the heating steam of the mixed salt mother liquor drying device form a circulation loop.
Example two
The method described in the first embodiment is further described below with reference to a waste heat recovery system of a salt mother liquor drying device.
The system comprises a high-temperature heat pump, a middle water tank, an ultrahigh-temperature heat pump, a flash tank, a heat dissipation device and a steam condensate tank.
The cold water side of the high-temperature heat pump and the cooling water of the mixed salt mother liquor drying device form a circulation loop, the circulating cooling water of the mixed salt mother liquor drying device releases heat on the cold water side of the high-temperature heat pump, and the heat is transferred to the hot water side of the high-temperature heat pump by the aid of the high-temperature heat pump acting.
The hot water side of the high-temperature heat pump and the middle water tank form a circulation loop, and the middle water tank and the cold water side of the ultra-high-temperature heat pump also form a circulation loop. The circulating water of the high-temperature heat pump absorbs heat at the hot water side of the high-temperature heat pump, is pumped to the middle water tank for storage, is conveyed to the cold water side of the ultra-high temperature heat pump by the middle water tank to release heat, and transfers the heat to the hot water side of the ultra-high temperature heat pump after acting through the ultra-high temperature heat pump.
The hot water side of the ultra-high temperature heat pump and the flash tank form a circulation loop, and circulating water of the ultra-high temperature heat pump is conveyed to the flash tank after absorbing heat at the hot water side of the ultra-high temperature heat pump, so that a flash evaporation phenomenon occurs, low-grade saturated steam and a liquid phase are separated, and the liquid phase returns to the hot water side of the ultra-high temperature heat pump to continuously absorb heat at the cold water side of the ultra-high temperature heat pump.
The flash tank, the steam condensate tank and the heating steam of the mixed salt mother liquor drying device form a circulation loop, low-grade saturated steam generated by the flash tank does work through a steam compressor arranged behind a steam outlet of the flash tank, the low-grade saturated steam is converted into high-grade saturated steam after the temperature and the pressure are increased, the high-grade saturated steam is conveyed to the mixed salt mother liquor drying device to release latent heat, and the heat is used for a heating evaporation process of the mixed salt mother liquor. The high-grade saturated steam is condensed into condensed water after releasing latent heat, and is conveyed back to the flash tank after being collected in the steam condensed liquid tank in a centralized manner.
In consideration of the operation stability of the system, a heat dissipation device is also arranged on a circulating loop formed by the cold water side of the high-temperature heat pump and the cooling water of the miscellaneous salt mother liquor drying device so as to partially remove the heat of the cooling water on the loop and ensure the stable operation of the system.
And because the heat abstractor can evaporate partial moisture while radiating, therefore, a water replenishing port and a sewage draining port are also arranged on the circulating loop to periodically discharge high-salt circulating water and replenish fresh water, so that the overhigh salt content of the cooling water in the circulating loop is avoided.
EXAMPLE III
The second embodiment will be described in detail with reference to specific process parameters and devices.
As shown in fig. 1, in this embodiment, a circulation loop is formed by the cooling water of the miscellaneous salt mother liquor drying device and the cold water side of the high-temperature heat pump, the cooling water in the circulation loop condenses the secondary steam of the miscellaneous salt mother liquor drying device in the miscellaneous salt mother liquor drying device, absorbs heat, converts the secondary steam into circulating cooling water of the miscellaneous salt mother liquor drying device, releases heat on the cold water side of the high-temperature heat pump, cools, converts the circulating cooling water into circulating cooling water of the miscellaneous salt mother liquor drying device, and returns to the miscellaneous salt mother liquor drying device to continue to condense the secondary steam of the miscellaneous salt mother liquor drying device.
In order to maintain the stable operation of the cycle, a heat dissipation device is further arranged on the cycle for dissipating the heat generated by the operation of the device.
As a practical solution, the heat dissipation device in this embodiment is one or more of a water cooling tower and a water chiller.
Furthermore, because partial water is evaporated in the process of heat dissipation by the heat dissipation device, the salinity of the circulating water in the circulating loop is increased, therefore, a water replenishing port and a sewage draining port are also arranged on the circulating loop, high-salinity circulating water is periodically discharged, fresh water is replenished, and the water quality in the circulating loop is maintained to be stable.
As shown in fig. 1, in the circulation loop, part of the cooling water enters the heat dissipation device to dissipate part of heat, and in consideration of system stability, the temperature of the return water cooled by the heat dissipation device is substantially consistent with that of the return water of the circulating cooling water of the miscellaneous salt mother liquor drying device.
After the circulating cooling water of the mixed salt mother liquor drying device is heated at the cold water side of the high-temperature heat pump, the circulating cooling water of the mixed salt mother liquor drying device with the temperature of 35-45 ℃ is cooled and converted into circulating cooling water of the mixed salt mother liquor drying device with the temperature of 25-35 ℃, and the high-temperature heat pump applies work to transfer the heat emitted from the cold water side to the hot water side of the high-temperature heat pump. The hot water side of the high temperature heat pump forms a circulation loop with the intermediate water tank, while the cold water side of the ultra high temperature heat pump also forms a circulation loop with the intermediate water tank. Circulating water enters the hot water side of the high-temperature heat pump from the intermediate water tank to absorb heat and then is discharged back to the intermediate water tank, and meanwhile, the circulating water also enters the cold water side of the ultra-high-temperature heat pump from the intermediate water tank to be discharged back to the intermediate water tank after being subjected to heat release and temperature reduction. That is, in the embodiment, the two circulation loops are matched with the intermediate water tank to realize heat transfer from the hot water side of the high-temperature heat pump to the cold water side of the ultra-high-temperature heat pump.
After the circulating water is heated at the cold water side of the ultra-high temperature heat pump, the circulating water applies work through the ultra-high temperature heat pump, and heat emitted from the cold water side is transferred to the hot water side of the ultra-high temperature heat pump. And the hot water side of the ultra-high temperature heat pump and the flash tank form a circulation loop, after the produced water at the hot water side of the ultra-high temperature heat pump is introduced into the flash tank, the flash evaporation phenomenon is generated, low-grade saturated steam and a liquid phase are separated, and the liquid phase returns to the hot water side of the ultra-high temperature heat pump to continuously absorb the heat transferred from the cold water side of the ultra-high temperature heat pump.
In the embodiment, the temperature of the low-grade saturated steam is 90-120 ℃, the absolute pressure is 70.2-198.7kPa, and a steam compressor is arranged behind the flash tank because of lower temperature and pressure.
And introducing the high-grade saturated steam into the mixed salt mother liquor drying device, condensing and releasing heat, and using the generated heat for evaporation drying of the mixed salt mother liquor. The high-grade saturated steam releases heat and is condensed into condensed water, and the condensed water enters a steam condensed liquid tank for storage and is conveyed into a flash tank to be mixed with a liquid phase.
In this embodiment, the high-temperature heat pump and the ultra-high-temperature heat pump are both water source heat pumps, the conversion efficiency of each heat pump is greater than or equal to 70%, the total energy efficiency ratio of the high-temperature heat pump to the ultra-high-temperature heat pump is not lower than 1.7, and the temperature difference of inlet and outlet water at the cold water side and the temperature difference of inlet and outlet water at the hot water side of each heat pump are both 5-10 ℃.
Furthermore, in order to ensure the stable operation of the system, the water quality of circulating water of each circulation of the hot water side of the high-temperature heat pump, the cold water side of the ultra-high-temperature heat pump and the hot water side of the ultra-high-temperature heat pump needs to meet the requirements that the conductivity is less than or equal to 0.3 mu s/cm, the content of silicon dioxide is less than or equal to 20 mu g/L and the hardness is approximately equal to 0 mu mol/L.
According to the waste heat recovery system of the miscellaneous salt mother liquor drying device, the two-stage heat pump system consisting of the high-temperature heat pump and the ultra-high-temperature heat pump is arranged, so that the waste heat is efficiently recovered, and the problems that a single-stage heat pump is difficult to achieve the expected technical effect and energy is wasted by a three-stage heat pump are solved. When the total energy efficiency ratio of the high-temperature heat pump and the ultrahigh-temperature heat pump is not less than 1.7 and the conversion efficiency of each heat pump is more than or equal to 70%, the energy consumption of the whole miscellaneous salt mother liquor drying process is reduced by more than 40%, the operation cost of the system is greatly reduced, the flow of the whole waste heat recovery device is simple, the operation is convenient, the occupied area is saved, the system can stably operate for a long time, and the system has a good application prospect.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A waste heat recycling method of a miscellaneous salt mother liquor drying device is characterized by comprising the following steps:
s101, conveying the circulating cooling water of the mixed salt mother liquor drying device to the cold water side of a high-temperature heat pump, and discharging heat to form circulating cooling water return water of the mixed salt mother liquor drying device;
s201, the high-temperature heat pump works to convey heat on the cold water side of the high-temperature heat pump to the hot water side of the high-temperature heat pump;
s301, the high-temperature heat pump circulating water absorbs heat at the hot water side of the high-temperature heat pump, is conveyed to the middle water tank, is conveyed to the cold water side of the ultra-high-temperature heat pump by the middle water tank, releases heat and then returns to the middle water tank;
s401, the ultra-high temperature heat pump does work, and heat on the cold water side of the ultra-high temperature heat pump is conveyed to the hot water side of the ultra-high temperature heat pump;
s501, conveying circulating water of the ultra-high temperature heat pump to a flash tank after absorbing heat at a hot water side of the ultra-high temperature heat pump, and generating low-grade saturated steam through flash evaporation;
s601, conveying the low-grade saturated steam generated in the S501 to a steam compressor, and converting the low-grade saturated steam into high-grade saturated steam by applying work through the steam compressor;
and S701, conveying the high-grade saturated steam to a miscellaneous salt mother liquor drying device, releasing latent heat for evaporation of water in the miscellaneous salt mother liquor, condensing the latent heat into condensate water, and conveying the condensate water back to a flash tank.
2. The method for recycling the waste heat of the miscellaneous salt mother liquor drying device according to claim 1, wherein the total energy efficiency ratio of the high-temperature heat pump and the ultrahigh-temperature heat pump is not less than 1.7.
3. The method for recycling the waste heat of the miscellaneous salt mother liquor drying device according to claim 1, wherein the temperature difference between the inlet water and the outlet water of the cold water side and the hot water side of the high-temperature heat pump is 5-10 ℃.
4. The method for recycling the waste heat of the miscellaneous salt mother liquor drying device according to claim 1, wherein the temperature difference between the inlet water and the outlet water of the cold water side and the hot water side of the ultra-high temperature heat pump is 5-10 ℃.
5. The method for recycling the waste heat of the miscellaneous salt mother liquor drying device of claim 1, wherein the steam compressor is a screw type steam compressor.
6. The method for recycling the waste heat of the miscellaneous salt mother liquor drying device of claim 5, wherein the temperature rise of the screw type steam compressor is 30-60 ℃.
7. The waste heat recycling method of the miscellaneous salt mother liquor drying device according to claim 1, wherein the water quality of the circulating water on the hot water side of the high-temperature heat pump, the cold water side of the ultra-high-temperature heat pump and the hot water side of the ultra-high-temperature heat pump meets the following requirements: the conductivity is less than or equal to 0.3 mu s/cm, the content of silicon dioxide is less than or equal to 20 mu g/L, and the hardness is approximately equal to 0 mu mol/L.
8. The method for recycling the waste heat of the miscellaneous salt mother liquor drying device according to claim 1, wherein the temperature of the low-grade saturated steam is 90-120 ℃, and the absolute pressure is 70.2-198.7kPa.
9. The method for recycling the waste heat of the miscellaneous salt mother liquor drying device according to claim 1, wherein the high-temperature heat pump and the ultra-high-temperature heat pump are both water source heat pumps.
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| US4100763A (en) * | 1976-06-21 | 1978-07-18 | International Telephone & Telegraph Corporation | Multi-source heat pump HVAC system |
| KR101851231B1 (en) * | 2017-04-19 | 2018-04-23 | (주)월드이엔씨 | Absorption type heat pump system for gaining high temperature |
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| CN109945278A (en) * | 2019-03-25 | 2019-06-28 | 大连理工大学 | A kind of energy conserving system being used for central heating using absorption heat pump depth Mist heat recovering |
| CN112284145A (en) * | 2020-10-27 | 2021-01-29 | 中冶沈勘秦皇岛工程设计研究总院有限公司 | Waste heat utilization device and method for metallurgical cooling tower |
| CN114353364A (en) * | 2022-01-12 | 2022-04-15 | 西安交通大学 | High-temperature steam generation system and method |
-
2022
- 2022-12-06 CN CN202211558146.9A patent/CN115818751B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4100763A (en) * | 1976-06-21 | 1978-07-18 | International Telephone & Telegraph Corporation | Multi-source heat pump HVAC system |
| KR101851231B1 (en) * | 2017-04-19 | 2018-04-23 | (주)월드이엔씨 | Absorption type heat pump system for gaining high temperature |
| CN108626817A (en) * | 2018-05-17 | 2018-10-09 | 北京今大禹环境技术股份有限公司 | A kind of technique of Hot wet air heating waste heat recovery |
| CN109945278A (en) * | 2019-03-25 | 2019-06-28 | 大连理工大学 | A kind of energy conserving system being used for central heating using absorption heat pump depth Mist heat recovering |
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| CN114353364A (en) * | 2022-01-12 | 2022-04-15 | 西安交通大学 | High-temperature steam generation system and method |
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