CN217785115U - Boiler exhaust steam recovery system - Google Patents
Boiler exhaust steam recovery system Download PDFInfo
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- CN217785115U CN217785115U CN202221700848.1U CN202221700848U CN217785115U CN 217785115 U CN217785115 U CN 217785115U CN 202221700848 U CN202221700848 U CN 202221700848U CN 217785115 U CN217785115 U CN 217785115U
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- steam
- sewage
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- deaerator
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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 76
- 239000010865 sewage Substances 0.000 claims abstract description 53
- 239000007921 spray Substances 0.000 claims abstract description 49
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000001301 oxygen Substances 0.000 claims abstract description 15
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 238000011033 desalting Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 208000028659 discharge Diseases 0.000 description 27
- 230000003749 cleanliness Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a boiler exhaust steam recovery system, include: a medium pressure steam drum; the low-pressure steam pocket is also used as a deaerator; the sewage discharge flash tank is used for receiving sewage from the medium-pressure steam drum and the low-pressure steam drum which are also used as deaerators so as to reduce the temperature and the pressure and discharge the sewage and flash steam; the desalting water tank is connected with the low-pressure steam drum and deaerator and discharges the desalting water to the low-pressure steam drum and deaerator; the spray tower receives the deoxygenated dead steam from the low-pressure steam drum and the deoxygenator and flash steam from the blowdown flash tank; the energy saver is connected with the sewage flash tank and is used for receiving sewage from the sewage flash tank, wherein a part of condensed water from the steam turbine enters the spray tower and is used for spraying flash steam and oxygen-removing dead steam, and the separated oxygen is discharged; and a part of condensed water from the steam turbine enters the economizer to exchange heat with the sewage from the sewage flash tank. The system has the effects of safety, energy conservation and economy.
Description
Technical Field
The utility model relates to a boiler economizer system especially relates to a novel field of boiler exhaust steam recovery system.
Background
Part of salt impurities and air are usually dissolved in boiler feed water, wherein oxygen dissolved in the air is a main corrosive substance of a boiler feed water system, and iron scale is formed on a boiler tube wall and a heated surface when the oxygen is not removed in time, so that the safety of the boiler system is influenced; wherein salt impurities are rarely taken away by steam, and the salt content exceeds the standard along with the continuous concentration of furnace water, and the pollution discharge treatment is required. The deoxidization of the boiler feed water is usually carried out by adopting a thermal deoxidization mode, and the method has the advantages of simplicity, reliability and good deoxidization effect; salt impurity sewage in a boiler is usually discharged by adopting two modes of continuous sewage discharge and periodic sewage discharge, saturated sewage enters a sewage discharge pool after flash evaporation, temperature reduction and pressure reduction in sewage discharge and expansion, flash steam is discharged into the atmosphere through the top, the temperature is very high, and a large amount of white steam is generated at the same time. Both of these methods cause considerable steam to be discharged as exhaust gas, resulting in waste of energy and thermal pollution of the environment.
Therefore, a new boiler exhaust steam recycling system needs to be developed, which can fully utilize waste gas, recycle water resources, improve energy utilization rate, reduce environmental pollution, and achieve the purposes of energy conservation and environmental protection.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problem and providing a boiler exhaust steam recovery system, possessing the ability of energy-conservation and environmental protection and improving the economy and stability of boiler exhaust steam recovery system.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a boiler exhaust steam recovery system, the system comprising: a medium pressure steam drum; the low-pressure steam pocket is also used as a deaerator; the sewage discharge flash tank is used for receiving sewage from the medium-pressure steam drum and the low-pressure steam drum which are also used as deaerators to reduce the temperature and the pressure and discharge the sewage and flash steam; the desalting water tank is connected with the low-pressure steam drum and deaerator and discharges the desalting water to the low-pressure steam drum and deaerator; the spray tower is connected with the low-pressure steam drum and deaerator and used for receiving deaerated dead steam from the low-pressure steam drum and deaerator, and the spray tower is connected with the pollution discharge flash tank and used for receiving flash steam from the pollution discharge flash tank; (ii) a The system further comprises: the energy saver is connected with the blowdown flash tank and used for receiving sewage from the blowdown flash tank, wherein a part of condensed water from a steam turbine enters the spray tower and is used for spraying flash steam and deoxygenated dead steam, and the separated oxygen is discharged through a pipeline; and a part of condensed water from the steam turbine enters the economizer to exchange heat with the sewage from the sewage flash tank.
Preferably, the economizer is connected to the spray tower, and condensed water enters the bottom of the spray tower from the economizer after heat exchange is carried out in the economizer.
Preferably, the desalting water tank is connected with the spray tower for receiving cold water from the bottom of the spray tower.
Preferably, the desalted water tank is connected with the low-pressure steam drum and deaerator through a low-pressure economizer, and desalted water from the desalted water tank enters the low-pressure steam drum and deaerator after being heated by the low-pressure economizer.
Preferably, the blowdown flash tank is connected with the medium-pressure steam drum and the low-pressure steam drum and the deaerator through pipelines, and the continuous-discharge and fixed-discharge sewage of the medium-pressure steam drum and the low-pressure steam drum and the deaerator is mixed and then enters the blowdown flash tank.
Preferably, the flash steam emission and the sewage emission of the pollution discharge flash tank and the deoxidization exhaust steam emission of the low-pressure steam pocket and the deaerator are all provided with bypasses, so that the normal operation of the system during operation and maintenance is ensured.
Preferably, steam-water separators are arranged at the tops of the spray tower and the sewage flash tank to prevent sewage from entering a pipeline at the top of the sewage flash tank and prevent condensed water from entering a pipeline at the top of the spray tower, so that the cleanliness and the safety in the pipeline are maintained.
Preferably, a check valve and a vacuum pump are arranged on the pipeline for discharging oxygen, so that the oxygen is discharged, air backflow is prevented, and the cleanliness in the spray tower is ensured.
Preferably, each pipeline is provided with a regulating valve and a flow meter, and flow parameters are regulated and controlled in real time.
Preferably, the economizer is a heat exchanger and is used for cooling sewage and heating condensed water, so that the purpose of cold and heat exchange is achieved.
The utility model discloses a theory of operation lies in:
the boiler continuous-discharge and fixed-discharge sewage and the oxygen-removed exhaust steam contain more low-quality waste heat. The low pressure steam pocket concurrently deoxidization exhaust steam of oxygen-eliminating device gets into in the spray column, sprays the cooling through the comdenstion water, and steam condensate water is by cyclic utilization, and oxygen is separated with steam after being cooled down, behind the catch water that sets up through the spray column top, discharges the atmosphere safely. The continuous-discharge and fixed-discharge sewage is decompressed and flashed in a blowdown flash tank, and the generated flash steam clean steam enters a spray tower to be condensed and recycled after passing through a steam-water separator arranged at the top of the blowdown flash tank; meanwhile, the sewage after being cooled exchanges heat with the condensed water in the energy saver, and after the condensed water is heated, the sewage after being cooled is discharged to a sewage tank, and the condensed water is discharged to the bottom of the spray tower. And cold water at the bottom of the spray tower enters a desalting water tank, is heated by a low-pressure economizer and then enters a low-pressure steam pocket and deaerator.
The utility model discloses following beneficial effect has:
(1) The steam is condensed into water for recycling, so that water resources are recovered, and the method is economical and reliable;
(2) The energy saver is used for cooling the sewage from the sewage discharge flash tank and heating the condensed water, so that the heat can be recycled, and the energy-saving effect is achieved.
(3) The flash water of the boiler blow-down flash tank is not directly discharged into the atmosphere, but enters the spray tower, so that the phenomenon of field gassing is avoided, the environmental pollution is small, and the purpose of environmental protection is realized.
(4) The system is safe in overall construction, economical and stable.
Drawings
Fig. 1 is a schematic structural view of an exhaust steam recovery system of a boiler according to an embodiment of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
As shown in fig. 1, according to the utility model discloses a boiler exhaust steam recovery system, this system includes: the system comprises a medium-pressure steam drum 1, a low-pressure steam drum and deaerator 2, a pollution discharge flash tank 3, an economizer 5, a demineralized water tank 6 and a spray tower 7. Wherein the sewage of continuous row, the fixed row of the low pressure steam pocket 1 and low pressure steam pocket double oxygen-eliminating device 2 is mixed and then together enters the blowdown flash tank 3 to cool down and depressurize, the sewage of cooling enters the energy saver 5 through the pipeline, the flash evaporation gas that produces discharges through the top of the blowdown flash tank 3 and enters the spray tower 7. The low-pressure steam drum and deaerator 2 is connected to the spray tower 7 through a pipeline, and deaerated exhaust steam discharged from the low-pressure steam drum and deaerator 2 enters the spray tower 7. And (3) allowing a part of the steam turbine condensate water to enter the top of the spray tower 7, spraying flash steam and deoxygenated exhaust steam to cool the spray tower, and cooling and separating the flash steam and the deoxygenated exhaust steam by the condensate water. The oxygen is separated from the steam after being cooled, the separated oxygen is discharged into the atmosphere through the top, and the steam is condensed into water and stays at the bottom of the spray tower 7. And a part of the turbine condensate water enters the economizer 5 through a pipeline and exchanges heat with sewage in the economizer 5, the sewage is discharged into a sewage tank after exchanging heat with the condensate water and reducing the temperature, and the heated condensate water enters the bottom of the spray tower 7 through a pipeline.
Further, a spray tower 7 is connected to the demineralized water tank 6 through a pipe, and cold water in the spray tower 7 is discharged into the demineralized water tank 6 through the bottom. The desalting water tank 6 is connected to the low-pressure economizer 4 through a pipeline, and desalting cold water in the desalting water tank 6 enters the low-pressure steam pocket and deaerator 2 after being heated and warmed by the low-pressure economizer 4 to be deaerated.
In one embodiment, a steam-water separator 8 is arranged at the top of the sewage flash tank 3 to prevent sewage from entering the pipeline and maintain the cleanliness and safety in the pipeline, and clean steam enters the spray tower 7 after flash steam passes through the steam-water separator 8. In one embodiment, a steam-water separator 8 is also provided at the top of the spray tower 7, and oxygen is safely discharged to the atmosphere after passing through the steam-water separator 8 provided at the top of the spray tower 7.
In one embodiment, a check valve and a vacuum pump 9 are arranged on the pipeline for discharging oxygen, so that the oxygen is discharged, air backflow is prevented, and the cleanliness in the spray tower is guaranteed.
In one embodiment, the flash steam discharge and the sewage discharge of the blowdown flash tank 3 and the deoxygenation exhaust steam discharge of the low-pressure steam drum and the deoxygenator 2 are all provided with a bypass, so that the normal operation of the system is ensured during operation and maintenance.
In each embodiment, a regulating valve 10 and a flow meter 11 are arranged on a condensed water supply pipeline of the steam turbine, flow parameters are regulated and controlled in real time, and the stability of the system is maintained. According to actual needs, the regulating valve 10 and the flow meter 11 can be arranged on other pipelines, including but not limited to a pipeline connecting the desalting water tank 6 with the spray tower 7, a pipeline connecting the desalting water tank 6 with the low-pressure economizer 4 and a pipeline connecting the blowdown flash tank 3 with the economizer 5.
According to the utility model discloses a boiler exhaust steam recovery system, the deoxidization exhaust steam of low pressure steam pocket and oxygen-eliminating device 2 gets into spray column 7, sprays the cooling through the comdenstion water, and steam condensate water is by cyclic utilization, and oxygen discharges the atmosphere after being cooled down with steam separation, through the catch water 8 of spray column 7 top setting. The continuous-discharge and fixed-discharge sewage is subjected to pressure reduction and flash evaporation in the blowdown flash tank 3, generated flash steam passes through a steam-water separator 8 arranged at the top of the blowdown flash tank 3, and clean steam enters a spray tower 7 to be condensed and then is recycled; meanwhile, the cooled sewage exchanges heat with the condensed water in the energy saver 5 to heat the condensed water, then the condensed water is discharged into the bottom of the spray tower 7, and the cooled sewage is discharged into a sewage pool. Cold water at the bottom of the spray tower 7 enters a desalting water tank 6, and then enters a low-pressure steam pocket and deaerator 2 after being heated by a low-pressure economizer 4.
Through the utility model discloses a boiler exhaust steam recovery system can retrieve the steam heat, and water resource and heat energy are retrieved, and the energy saving stops on-the-spot gassing phenomenon and eliminates the frozen hidden danger in ground winter.
Above only do the preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above embodiment, all belong to the technical scheme of the present invention all belong to the protection scope of the present invention. Various one or more features described above can be interchanged, exchanged, combined, or substituted with other features described above for use in the embodiments described in the present disclosure and other embodiments within the scope of the present disclosure. For those skilled in the art, several modifications can be made without departing from the principle of the present invention, and such modifications should also be considered as the protection scope of the present invention.
Claims (10)
1. A boiler exhaust steam recovery system, the system comprising:
a medium pressure steam drum (1);
the low-pressure steam pocket is also used as a deaerator (2);
the sewage discharge flash tank (3) is used for receiving sewage from the medium-pressure steam drum (1) and the low-pressure steam drum and deaerator (2) to reduce the temperature and pressure and discharge the sewage and flash steam;
a demineralized water tank (6) which is connected with the low-pressure steam pocket and deaerator (2) and discharges demineralized water to the low-pressure steam pocket and deaerator (2);
a spray tower (7); it is characterized in that the preparation method is characterized in that,
the spray tower (7) is connected with the low-pressure steam drum and deaerator (2) and is used for receiving deaerated dead steam from the low-pressure steam drum and deaerator (2), and the spray tower (7) is connected with the pollution discharge flash tank (3) and is used for receiving flash steam from the pollution discharge flash tank (3); the system further comprises:
an economizer (5) connected to the blowdown flash tank (3) for receiving sewage from the blowdown flash tank (3);
wherein, a part of condensed water from the steam turbine enters the spray tower (7) for spraying flash steam and oxygen-removed dead steam, and the separated oxygen is discharged through a pipeline; and a part of condensed water from the steam turbine enters the economizer (5) to exchange heat with the sewage from the sewage flash tank (3).
2. The boiler exhaust steam recovery system according to claim 1, wherein the economizer (5) is connected to the spray tower (7), and the heat-exchanged condensed water enters the spray tower (7) from the economizer (5).
3. The boiler exhaust steam recovery system according to claim 2, wherein the demineralized water tank (6) is connected with the spray tower (7) through a pipe for receiving cold water from the spray tower (7).
4. The boiler exhaust steam recovery system according to claim 3, wherein the demineralized water tank (6) is connected with the low-pressure drum and deaerator (2) via a low-pressure economizer (4).
5. The boiler exhaust steam recovery system according to claim 1, wherein the blowdown flash tank (3) is connected with the medium-pressure steam drum (1) and the low-pressure steam drum and deaerator (2) through pipelines, and sewage discharged by the medium-pressure steam drum (1) and the low-pressure steam drum and deaerator (2) in a continuous and fixed mode is mixed and then enters the blowdown flash tank (3).
6. The boiler exhaust steam recovery system according to claim 1, wherein a flash steam discharge and a sewage discharge of the blowdown flash tank (3) and a deoxygenated exhaust steam discharge of the low-pressure steam drum and deoxygenator (2) are all provided with a bypass, so that normal operation of the system is guaranteed during operation and maintenance.
7. The boiler exhaust steam recovery system according to claim 1, wherein a steam-water separator (8) is arranged at the top of the spray tower (7) and the blowdown flash tank (3).
8. The boiler exhaust steam recovery system according to claim 1, wherein the pipeline for discharging oxygen is provided with a check valve and a vacuum pump (9).
9. The boiler exhaust steam recovery system according to claim 1, wherein each pipeline is provided with a regulating valve (10) and a flow meter (11) for real-time regulation of flow parameters.
10. The boiler spent steam recovery system according to any one of claims 1 to 9 wherein the economizer is a heat exchanger for cooling the contaminated water and heating the condensed water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221700848.1U CN217785115U (en) | 2022-07-04 | 2022-07-04 | Boiler exhaust steam recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221700848.1U CN217785115U (en) | 2022-07-04 | 2022-07-04 | Boiler exhaust steam recovery system |
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| CN217785115U true CN217785115U (en) | 2022-11-11 |
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| CN202221700848.1U Active CN217785115U (en) | 2022-07-04 | 2022-07-04 | Boiler exhaust steam recovery system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115751273A (en) * | 2022-11-21 | 2023-03-07 | 中铝环保节能集团有限公司 | Multi-input efficient continuous-discharge capacity expansion device for flash boiler |
| CN116293613A (en) * | 2023-04-14 | 2023-06-23 | 昊姆（上海）节能科技有限公司 | A system and control method for deep recovery and utilization of exhausted steam in continuous drainage |
| CN116951396A (en) * | 2023-08-16 | 2023-10-27 | 中国船舶重工集团公司第七0三研究所无锡分部 | Pollution discharge and steam exhaust integrated zero emission recovery system special for boiler and operation method |
| CN118856315A (en) * | 2024-07-26 | 2024-10-29 | 中冶焦耐(大连)工程技术有限公司 | A heat recovery coke oven waste heat boiler blowdown flash steam recovery system and method |
| CN120083972A (en) * | 2025-05-07 | 2025-06-03 | 山东国舜建设集团有限公司 | A system and method for collaboratively recovering multi-source waste heat from a power plant based on slurry flash evaporation |
-
2022
- 2022-07-04 CN CN202221700848.1U patent/CN217785115U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115751273A (en) * | 2022-11-21 | 2023-03-07 | 中铝环保节能集团有限公司 | Multi-input efficient continuous-discharge capacity expansion device for flash boiler |
| CN116293613A (en) * | 2023-04-14 | 2023-06-23 | 昊姆（上海）节能科技有限公司 | A system and control method for deep recovery and utilization of exhausted steam in continuous drainage |
| CN116293613B (en) * | 2023-04-14 | 2026-04-24 | 昊姆（上海）节能科技有限公司 | A system and control method for deep recovery and utilization of waste steam from wastewater. |
| CN116951396A (en) * | 2023-08-16 | 2023-10-27 | 中国船舶重工集团公司第七0三研究所无锡分部 | Pollution discharge and steam exhaust integrated zero emission recovery system special for boiler and operation method |
| CN118856315A (en) * | 2024-07-26 | 2024-10-29 | 中冶焦耐(大连)工程技术有限公司 | A heat recovery coke oven waste heat boiler blowdown flash steam recovery system and method |
| CN120083972A (en) * | 2025-05-07 | 2025-06-03 | 山东国舜建设集团有限公司 | A system and method for collaboratively recovering multi-source waste heat from a power plant based on slurry flash evaporation |
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