CN211552560U - Flue gas waste heat degree of depth recovery system - Google Patents
Flue gas waste heat degree of depth recovery system Download PDFInfo
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- CN211552560U CN211552560U CN201922168470.XU CN201922168470U CN211552560U CN 211552560 U CN211552560 U CN 211552560U CN 201922168470 U CN201922168470 U CN 201922168470U CN 211552560 U CN211552560 U CN 211552560U
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- heat exchanger
- flue gas
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Abstract
The utility model discloses a flue gas waste heat degree of depth recovery system, including exhaust-heat boiler, exhaust-heat boiler one side is connected with the draught fan, still includes the demineralized water rising temperature device, and the demineralized water rising temperature device includes fluoroplastics heat exchanger, a pipeline, circulating water pump and plate heat exchanger, and fluoroplastics heat exchanger one side is equipped with the tubaeform flue gas air inlet of bore along advancing cigarette direction crescent, and the opposite side of fluoroplastics heat exchanger is equipped with the tubaeform flue gas outlet that the bore reduces along the play cigarette direction gradually, and the flue gas air inlet is connected with the discharge port of draught fan, the beneficial effects of the utility model are that: the utility model relates to a flue gas waste heat degree of depth recovery system adopts one set of closed circulating water system to absorb the heat from the fluoroplastics heat exchanger of flue gas side, gives the demineralized water with heat release from the plate heat exchanger, through retrieving the flue gas heat, reduces the boiler heat loss of discharging fume, improves the demineralized water temperature, reduces oxygen-eliminating device heating steam quantity, reaches energy saving and consumption reduction's purpose.
Description
Technical Field
The utility model relates to a waste heat recovery technical field specifically is a flue gas waste heat degree of depth recovery system.
Background
In industrial production, the heat loss of exhaust smoke is the largest one of various heat losses of a power station boiler, generally 5-8%, and accounts for 80% or more of the total heat loss of the boiler. The design exhaust gas temperature of the coal-fired power plant boiler in China is mostly 140-150 ℃, if the exhaust gas temperature can be reduced to 70-90 ℃, the boiler efficiency can be improved by 2-5%, and the power supply coal consumption can be reduced by 2-6 g/(kWh). At the present stage, the deaerator in the boiler mainly has the functions of removing oxygen and other gases in boiler feed water, ensuring the quality of feed water, heating the feed water and improving the temperature of the feed water, and at the present stage, the deaerator gradually heats the feed water to generate steam, how to preheat desalted water before entering the deaerator by utilizing the recovery of waste heat of the boiler so as to reduce the amount of the steam used for heating the deaerator, which is a current short plate in the industry, thereby easily causing the great waste of energy.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a flue gas waste heat degree of depth recovery system to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a flue gas waste heat degree of depth recovery system, includes exhaust-heat boiler, exhaust-heat boiler one side is connected with the draught fan, still includes demineralized water rising temperature device, demineralized water rising temperature device includes fluoroplastics heat exchanger, a pipeline, circulating water pump and plate heat exchanger, fluoroplastics heat exchanger one side is equipped with the tubaeform flue gas inlet of bore along advancing cigarette direction crescent, fluoroplastics heat exchanger's opposite side is equipped with the tubaeform flue gas outlet that the bore reduces along the play cigarette direction gradually, the flue gas inlet is connected with the discharge port of draught fan, fluoroplastics heat exchanger is connected with plate heat exchanger through circulating water pipeline, circulating water pipeline includes a pipeline and plate heat exchanger.
Preferably, a heat medium outlet of the fluoroplastic heat exchanger is connected with one end of a second pipeline, a refrigerant outlet of the fluoroplastic heat exchanger is connected with one end of the first pipeline, the other end of the second pipeline is connected with a heat medium inlet of the plate heat exchanger, the other end of the first pipeline is connected with a heat medium outlet of the plate heat exchanger, the refrigerant inlet of the plate heat exchanger is connected with a desalting water tank, a desalting water pump is connected on a pipeline between the plate heat exchanger and the desalting water tank, and the refrigerant outlet of the plate heat exchanger is connected with a deaerator.
Preferably, a dust remover is fixedly connected between the waste heat boiler and the draught fan, an outlet of an air preheater of the waste heat boiler is connected with a smoke inlet end of the dust remover, and a smoke exhaust end of the dust remover is connected with an air inlet of the draught fan.
Preferably, the flue gas outlet at one side of the fluoroplastic heat exchanger is sequentially connected with a desulfurizing tower and a chimney through pipelines.
Preferably, a variable-frequency circulating water pump is arranged on the circulating water pipeline.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model relates to a flue gas waste heat degree of depth recovery system adopts one set of closed circulating water system to absorb the heat from the fluoroplastics heat exchanger of flue gas side, gives the demineralized water with heat release from the plate heat exchanger, through retrieving the flue gas heat, reduces the boiler heat loss of discharging fume, improves the demineralized water temperature, reduces oxygen-eliminating device heating steam quantity, reaches energy saving and consumption reduction's purpose.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a waste heat boiler; 2. a dust remover; 3. an induced draft fan; 4. a fluoroplastic heat exchanger; 5. a flue gas inlet; 6. a flue gas outlet; 7. a desulfurizing tower; 8. a chimney; 9. a first pipeline; 91. a second pipeline; 10. a water circulating pump; 11. a plate heat exchanger; 12. a demineralized water tank; 13. a demineralized water pump; 14. a deaerator.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: the utility model provides a flue gas waste heat degree of depth recovery system, including exhaust- heat boiler 1, 1 one side of exhaust-heat boiler is connected with draught fan 3, still include demineralized water rising temperature device, demineralized water rising temperature device includes fluoroplastics heat exchanger 4, a pipeline 9, circulating water pump 10 and plate heat exchanger 11, 4 one side of fluoroplastics heat exchanger is equipped with the tubaeform flue gas inlet 5 of bore along advancing cigarette direction crescent, fluoroplastics heat exchanger 4's opposite side is equipped with tubaeform flue gas outlet 6 that the bore gradually reduces along the play cigarette direction, evenly be equipped with a plurality of fluoroplastics heat transfer hoses in the fluoroplastics heat exchanger 4, flue gas inlet 5 is connected with draught fan 3's discharge port, fluoroplastics heat exchanger 4 is connected with plate heat exchanger 11 through the circulating water pipeline, the circulating water pipeline includes pipeline.
A heat medium outlet of the fluoroplastic heat exchanger 4 is connected with one end of a second pipeline 91, a refrigerant outlet of the fluoroplastic heat exchanger 4 is connected with one end of a first pipeline 9, the other end of the second pipeline 91 is connected with a heat medium inlet of a plate heat exchanger 11, the other end of the first pipeline 9 is connected with a heat medium outlet of the plate heat exchanger 11, the first pipeline 9 and the second pipeline 91 of the circulating water pipeline, the fluoroplastic heat exchanger 4 and the plate heat exchanger 11 form a circulating water system together, a refrigerant inlet of the plate heat exchanger 11 is connected with a desalted water tank 12, a desalted water pump 13 is connected on the pipeline between the plate heat exchanger 11 and the desalted water tank 12, a refrigerant outlet of the plate heat exchanger 11 is connected with a deaerator 14, the fluoroplastic heat exchanger 4 absorbs heat, the plate heat exchanger 11 on the other side releases the heat to desalted water, and a dust remover 2 is fixedly connected between, an outlet of an air preheater of the waste heat boiler 1 is connected with a smoke inlet end of a dust remover 2, a smoke outlet end of the dust remover 2 is connected with an air inlet of an induced draft fan 3 to remove particles in smoke directly coming from the waste heat boiler 1, a smoke outlet 6 at one side of a fluoroplastic heat exchanger 4 is sequentially connected with a desulfurizing tower 7 and a smoke exhaust chimney 8 through pipelines, a variable-frequency circulating water pump 10 is arranged on a circulating water pipeline, and the variable-frequency circulating water pump 5 can automatically adjust the amount of water inflow so as to maintain the normal water supply amount to be suitable for the water outflow required by the load of the heat exchanger.
When the waste heat boiler is used, flue gas of the waste heat boiler 1 enters each chamber in the fluoroplastic heat exchanger 4 from the flue gas inlet 5 through the induced draft fan 3 to exchange heat with each fluoroplastic heat exchange hose, the flue gas is converted into low-temperature flue gas through each fluoroplastic heat exchange hose to be discharged from the flue gas outlet 6, and then is discharged from the exhaust chimney 8 through the desulfurizing tower 7, the first pipeline 9 and the second pipeline 91 of the circulating water pipeline, the fluoroplastic heat exchanger 4 and the plate heat exchanger 11 jointly form a circulating water system, the fluoroplastic heat exchanger 4 absorbs heat of the flue gas discharged by the waste heat boiler 1, the heat is released to desalted water from the plate heat exchanger 11 through the circulating water pipeline, the desalted water is subjected to pre-heating treatment, and the purposes of saving energy and reducing consumption are achieved by recovering the heat of the flue gas, reducing heat loss of the boiler exhaust gas, increasing the.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a flue gas waste heat degree of depth recovery system, includes exhaust-heat boiler (1), its characterized in that: exhaust-heat boiler (1) one side is connected with draught fan (3), still includes demineralized water rising temperature device, demineralized water rising temperature device includes fluoroplastics heat exchanger (4), pipeline (9), circulating water pump (10) and plate heat exchanger (11), fluoroplastics heat exchanger (4) one side is equipped with tubaeform flue gas inlet (5) that the bore increases along advancing cigarette direction gradually, the opposite side of fluoroplastics heat exchanger (4) is equipped with tubaeform flue gas outlet (6) that the bore reduces along going out cigarette direction gradually, flue gas inlet (5) are connected with the discharge port of draught fan (3), fluoroplastics heat exchanger (4) are connected with plate heat exchanger (11) through the circulating water pipeline, the circulating water pipeline includes pipeline (9) and plate heat exchanger (11).
2. The deep recovery system of flue gas waste heat according to claim 1, characterized in that: the heat medium outlet of fluoroplastics heat exchanger (4) is connected with No. two pipeline (91) one end, the refrigerant outlet of fluoroplastics heat exchanger (4) is connected with the one end of a pipeline (9), No. two pipeline (91) other ends are connected with the heat medium entry of plate heat exchanger (11), the other end of a pipeline (9) is connected with the heat medium outlet of plate heat exchanger (11), the refrigerant entry linkage of plate heat exchanger (11) has desalination water tank (12), be connected with desalination water pump (13) on the pipeline between plate heat exchanger (11) and desalination water tank (12), the refrigerant exit linkage of plate heat exchanger (11) has oxygen-eliminating device (14).
3. The deep recovery system of flue gas waste heat according to claim 1, characterized in that: fixedly connected with dust remover (2) between exhaust-heat boiler (1) and draught fan (3), the air preheater export of exhaust-heat boiler (1) is connected with the cigarette end that advances of dust remover (2), the end of discharging fume of dust remover (2) is connected with the air intake of draught fan (3).
4. The deep recovery system of flue gas waste heat according to claim 1, characterized in that: the flue gas outlet (6) at one side of the fluoroplastic heat exchanger (4) is sequentially connected with a desulfurizing tower (7) and a chimney (8) through pipelines.
5. The deep recovery system of flue gas waste heat according to claim 1, characterized in that: and a variable-frequency circulating water pump (10) is arranged on the circulating water pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922168470.XU CN211552560U (en) | 2019-12-06 | 2019-12-06 | Flue gas waste heat degree of depth recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922168470.XU CN211552560U (en) | 2019-12-06 | 2019-12-06 | Flue gas waste heat degree of depth recovery system |
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| Publication Number | Publication Date |
|---|---|
| CN211552560U true CN211552560U (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922168470.XU Active CN211552560U (en) | 2019-12-06 | 2019-12-06 | Flue gas waste heat degree of depth recovery system |
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| Country | Link |
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| CN (1) | CN211552560U (en) |
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2019
- 2019-12-06 CN CN201922168470.XU patent/CN211552560U/en active Active
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