CN107906505B - Method and system for deeply recycling steam condensate - Google Patents
Method and system for deeply recycling steam condensate Download PDFInfo
- Publication number
- CN107906505B CN107906505B CN201711104728.9A CN201711104728A CN107906505B CN 107906505 B CN107906505 B CN 107906505B CN 201711104728 A CN201711104728 A CN 201711104728A CN 107906505 B CN107906505 B CN 107906505B
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- steam
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- temperature
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004064 recycling Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 86
- 238000010521 absorption reaction Methods 0.000 claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 12
- 238000011033 desalting Methods 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000003303 reheating Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 abstract description 4
- 230000008020 evaporation Effects 0.000 abstract description 4
- 150000001450 anions Chemical class 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
A method and a system for deeply recycling steam condensate are characterized in that a flash tank is used for secondary flash evaporation, a heat exchanger is used for heat exchange, an absorption heat pump is connected with a mixed bed and the heat exchanger, a steam compressor 7 is used for compressing, heating and boosting to enter a medium-low pressure pipe network to realize secondary utilization of steam, a condensate deep recycling system is realized, full recycling and load adjustment of condensate are guaranteed, flash evaporation heat of the condensate is deeply recycled, full heat recycling and water resource recycling of the condensate are realized, utilization efficiency of the condensate is improved, and economy is outstanding.
Description
Technical Field
The invention relates to the technical field of energy conservation and environmental protection, in particular to a method and a system for deeply recycling steam condensate.
Background
At present, a large amount of steam is consumed in the industrial field, a large amount of condensed water is discharged, the condensed water contains higher heat, and an open device is adopted for recycling the condensed water, so that a large amount of secondary flash steam is discharged into the atmosphere, and heat and water resources are wasted. In addition, as shown in fig. 1, the steam used in the industrial process can be polluted to different degrees, the purification treatment is generally required to be filtered by reverse osmosis precision, the anions and cations are removed by a mixed bed, the deoxidation treatment is required to be performed by two processes of heat release and heat absorption, and the heat release and heat absorption of a heat exchanger are mainly adopted at present, so that a large amount of heat is dissipated.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method and a system for deeply recycling steam condensate, which improve the heat energy utilization efficiency and reduce the heat energy pollution and the water resource waste.
In order to achieve the technical purpose, the adopted technical scheme is as follows: a method for deeply recovering steam condensate, comprising the steps of:
step one, steam condensate enters a flash tank, steam generated by the flash tank enters a steam compressor, the steam compressor heats and boosts the temperature of the steam compression, the steam is discharged from a compression outlet of the steam compressor and then is mixed with spray water, and the mixture is cooled and then enters a pipe network as low-pressure steam;
step two, condensed water in the flash tank enters a heat exchanger through a condensate pump to release heat and cool, the temperature of the inlet water is 60-70 ℃, and the heat exchange and the cooling are carried out in the heat exchanger to 30-38 ℃ to be used as a low-temperature heat source to enter an absorption heat pump;
step three, further cooling in the absorption heat pump, discharging from the absorption heat pump at about 25-35 ℃ and entering a mixed bed, and entering a desalting water tank after passing through the mixed bed;
and fourthly, cold water which is discharged from a desalting water tank and is at about 25-35 ℃ enters a heat exchanger to absorb heat and raise the temperature, the water temperature is raised to 55-65 ℃, then the water is discharged from the heat exchanger and enters an absorption heat pump to be used as hot water to continuously absorb heat and raise the temperature, the water is raised to 68-75 ℃ and is discharged from the absorption heat pump, and high-temperature heat source of the absorption heat pump 4 adopts high-temperature steam.
Further, the hot water at 68-75 ℃ discharged by the absorption heat pump is heated to 100-110 ℃ through subsequent heating, deoxygenated by the deoxygenator, and then enters a steam boiler for reheating and recycling.
A system used by a method for deeply recycling steam condensate comprises a steam compressor, a flash tank, a condensate pump, a heat exchanger, an absorption heat pump, a mixed bed and a desalting water tank, wherein a steam outlet of the flash tank is connected with a steam inlet of the steam compressor, a spray water device is arranged at a compression outlet of the steam compressor, a condensate outlet I of the flash tank is connected with a heat source inlet of the heat exchanger through the condensate pump, a heat source outlet of the heat exchanger is connected with a low-temperature heat source inlet of the absorption heat pump, a low-temperature heat source outlet of the absorption heat pump is connected with a water inlet of the mixed bed, a water outlet of the mixed bed is connected with a water inlet of the desalting water tank, a water outlet of the desalting water tank is connected with a low-temperature inlet of the heat exchanger, and a high-temperature outlet of the heat exchanger is connected with a high-temperature hot water inlet of the absorption heat pump.
The compression outlet of the steam compressor is connected with a low-pressure steam pipeline of a pipe network after passing through a spray water device.
The invention has the beneficial effects that: the utility model discloses an use flash tank, absorption heat pump, vapor compressor and heat exchanger as the condensate depth recovery system of core, guarantee the abundant recovery and the load adjustment of condensate, the condensate flash evaporation heat is retrieved to the degree of depth, realizes the heat of condensate and fully retrieves and water resource cyclic utilization, has improved the utilization efficiency of condensate, and the economic nature is outstanding.
Drawings
FIG. 1 is a schematic diagram of a prior art structure;
FIG. 2 is a schematic diagram of the structure of the present invention;
in the figure: 1. flash tank, 2, condensate pump, 3, heat exchanger, 4, absorption heat pump, 5, mixed bed, 6, desalination tank, 7, vapor compressor, 8, condensate inlet, 9, spray water, 10, low pressure steam pipeline, 11, spray water device, 12, steam outlet, 13, condensate outlet I, 31, heat source inlet, 32, heat source outlet, 33, low temperature inlet, 34, high temperature outlet, 41, low temperature heat source inlet, 42, low temperature heat source outlet, 43, high temperature heat water inlet, 44, high temperature heat water outlet, 45, high temperature steam inlet, 46, condensate outlet II, 47, condensate tank, 48, heater, 49, deaerator, 50, steam boiler.
Detailed Description
The invention is described in connection with the accompanying drawings and specific embodiments, but the invention is not limited to these embodiments.
As shown in fig. 2, a method for deeply recovering steam condensate includes the steps of:
step one, steam condensate enters a flash tank 1 from a condensate inlet 8, steam generated by the flash tank 1 enters a steam inlet of a steam compressor 7 from a steam outlet 12, the steam compressor 7 heats and boosts the temperature of the steam compression, is discharged from the compression outlet of the steam compressor 7 and then is mixed with spray water 9 sprayed by a spray water device 11, and enters a pipe network as low-pressure steam from a low-pressure steam pipeline 10 after being cooled;
step two, condensed water in the flash tank 1 is discharged through a condensed water outlet I, enters the heat exchanger 3 from a heat source inlet 31 through a condensed water pump 2 to release heat and cool, the temperature of the water entering the heat source inlet is 60-70 ℃, the water enters the heat exchanger to exchange heat and cool to 30-38 ℃ to serve as a low-temperature heat source in the heat exchanger, and is discharged from a heat source outlet 32 of the heat exchanger, and enters the absorption heat pump 4 from a low-temperature heat source inlet 41;
step three, further cooling in the absorption heat pump 4, discharging from a low-temperature heat source outlet 42 at 25-35 ℃ to enter the mixed bed 5, removing anions and cations brought in the process, and then entering a desalting water tank 6;
step four, cold water at 25-35 ℃ discharged from a water outlet of the demineralized water tank 6 enters the heat exchanger 3 through the low-temperature inlet 33 to absorb heat and raise the temperature, the water temperature rises to 55-65 ℃, the water is discharged through the high-temperature outlet 34 and enters the absorption heat pump 4 through the high-temperature water inlet 43 to absorb heat and raise the temperature as hot water, the water is discharged through the high-temperature water outlet 44 after the temperature rises to 68-75 ℃, high-temperature heat source of the absorption heat pump 4 adopts high-temperature steam, the high-temperature steam is introduced through the high-temperature steam inlet 45, and condensed water formed is discharged through the condensed water outlet II;
step five, the hot water at 68-75 ℃ discharged from the hot water outlet 44 is heated to 104 ℃ through subsequent heating, deoxygenated by the deoxygenator, and then enters a steam boiler for reheating and recycling.
The deep recovery method of the condensed water is utilized to realize the deep recovery and cyclic utilization of the condensed water and fully recover heat and water resources.
A system used by a method for deeply recycling steam condensate comprises a steam compressor 7, a flash tank 1, a condensate pump 2, a heat exchanger 3, an absorption heat pump 4, a mixed bed 5 and a demineralized water tank 6, wherein a steam outlet 12 of the flash tank 1 is connected with a steam inlet of the steam compressor 7, a spray water device 11 is arranged at a compression outlet of the steam compressor 7, a condensate outlet I13 of the flash tank 1 is connected with a heat source inlet 31 of the heat exchanger 3 through the condensate pump 2, a heat source outlet 32 of the heat exchanger 3 is connected with a low-temperature heat source inlet 41 of the absorption heat pump 4, a low-temperature heat source outlet 42 of the absorption heat pump 4 is connected with a water inlet of the mixed bed 5, a water outlet of the mixed bed 5 is connected with a water inlet of the demineralized water tank 6, a water outlet of the demineralized water tank 6 is connected with a low-temperature inlet 33 of the heat exchanger 3, and a high-temperature outlet 34 of the heat exchanger 3 is connected with a high-temperature heat water inlet 43 of the absorption heat pump 4.
The compression outlet of the steam compressor 7 is connected with a low-pressure steam pipeline 10 of the pipe network after passing through a spray water device 11, and provides low-pressure steam for the pipe network.
(1) The flash tank 1 adopts secondary flash evaporation, vapor-liquid separation and vortex prevention design, the flash tank 1 is provided with a condensate inlet 8, a steam outlet 12 and a condensate outlet I13, is connected with the steam compressor 7 and the condensate pump 2, and is internally provided with a liquid level detection control device;
(2) The absorption heat pump 4 adopts steam as a high-temperature heat source, and the absorption heat pump 4 is respectively connected with the heat exchanger 3 and the mixed bed 5;
(3) The condensed water sequentially passes through the heat exchanger 3, the absorption heat pump 4 and the mixed bed 5, and the heat is comprehensively utilized through cascade heat release and heat absorption;
(4) The steam is compressed, heated and boosted by the steam compressor 7 and enters a medium-low pressure pipe network to realize the secondary utilization of the steam.
The above is only a specific description of the preferred embodiments of the present patent, and all the equivalent changes or applications performed on the basis of the present technical solution are not excluded from the protection scope of the present patent.
Claims (4)
1. A method for deeply recycling steam condensate, which is characterized by comprising the following steps: the method comprises the following steps:
step one, steam condensate enters a flash tank, steam generated by the flash tank enters a steam compressor, the steam compressor heats and boosts the temperature of the steam compression, the steam is discharged from a compression outlet of the steam compressor and then is mixed with spray water, and the mixture is cooled and then enters a pipe network as low-pressure steam;
step two, condensed water in the flash tank enters a heat exchanger through a condensate pump to release heat and cool, the temperature of the inlet water is 60-70 ℃, and the heat exchange and the cooling are carried out in the heat exchanger to 30-38 ℃ to be used as a low-temperature heat source to enter an absorption heat pump;
step three, further cooling in the absorption heat pump, discharging from the absorption heat pump at about 25-35 ℃ and entering a mixed bed, and entering a desalting water tank after passing through the mixed bed;
and fourthly, cold water with the temperature of about 25-35 ℃ discharged from the desalted water tank enters a heat exchanger to absorb heat and raise the temperature, the water temperature is raised to 55-65 ℃, then the water is discharged from the heat exchanger and enters an absorption heat pump to serve as hot water to continuously absorb heat and raise the temperature, the water is raised to 68-75 ℃ and is discharged from the absorption heat pump, and high-temperature heat sources of the absorption heat pump adopt high-temperature steam.
2. A method for the deep recovery of steam condensate as in claim 1 wherein: the hot water at 68-75 ℃ discharged by the absorption heat pump is heated to 100-110 ℃ through subsequent heating, deoxidized by a deoxidizer and then enters a steam boiler for reheating and recycling.
3. A system for use in a method for deep recovery of steam condensate as in claim 1, wherein: including vapor compressor (7), flash tank (1), condensate pump (2), heat exchanger (3), absorption heat pump (4), mixed bed (5) and demineralized water case (6), vapor outlet (12) of flash tank (1) are connected with vapor inlet of vapor compressor (7), the compression exit of vapor compressor (7) is equipped with spray water device (11), condensate outlet I (13) of flash tank (1) are connected with heat source entry (31) of heat exchanger (3) through condensate pump (2), heat source export (32) of heat exchanger (3) are connected with low temperature heat source entry (41) of absorption heat pump (4), the delivery port of absorption heat pump (4) is connected with mixed bed (5) water inlet, the delivery port of mixed bed (5) is connected with the water inlet of demineralized water case (6), the delivery port of demineralized water case (6) is connected with low temperature entry (33) of heat exchanger (3), high temperature export (34) of heat exchanger (3) are connected with high temperature heat water entry (43) of absorption heat pump (4).
4. A system for use in a method for deep recovery of steam condensate as in claim 3, wherein: the compression outlet of the steam compressor (7) is connected with a low-pressure steam pipeline (10) of a pipe network after passing through a spray water device (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711104728.9A CN107906505B (en) | 2017-11-10 | 2017-11-10 | Method and system for deeply recycling steam condensate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711104728.9A CN107906505B (en) | 2017-11-10 | 2017-11-10 | Method and system for deeply recycling steam condensate |
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| Publication Number | Publication Date |
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| CN107906505A CN107906505A (en) | 2018-04-13 |
| CN107906505B true CN107906505B (en) | 2024-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711104728.9A Active CN107906505B (en) | 2017-11-10 | 2017-11-10 | Method and system for deeply recycling steam condensate |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027692A (en) * | 2018-09-26 | 2018-12-18 | 河南中烟工业有限责任公司 | Unsmooth device and control method are discharged in a kind of solution condensed water end |
| CN109297010B (en) * | 2018-09-26 | 2020-06-23 | 河南中烟工业有限责任公司 | Power equipment condensate water recovery system with water vapor compressor |
| CN114322595B (en) * | 2022-01-13 | 2022-07-19 | 山东飞洋节能技术有限公司 | Low-end-difference anti-corrosion efficient waste heat recovery energy-saving system and device |
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| CN206291194U (en) * | 2016-12-05 | 2017-06-30 | 中冶华天工程技术有限公司 | A kind of gas generating system based on steel mill's saturated vapor Optimum utilization |
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2017
- 2017-11-10 CN CN201711104728.9A patent/CN107906505B/en active Active
Patent Citations (8)
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|---|---|---|---|---|
| KR20020050928A (en) * | 2000-12-22 | 2002-06-28 | 김형벽ㅂ | Control Method and Structure of Condensate of an Absorption Chiller with Hot Water Supply Function |
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| CN107906505A (en) | 2018-04-13 |
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Address after: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Applicant after: CSSC Shuangrui (Luoyang) special equipment Co.,Ltd. Address before: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Applicant before: LUOYANG SUNRUI SPECIAL EQUIPMENT Co.,Ltd. |
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