CN218001553U - Flue gas waste heat recovery system - Google Patents
Flue gas waste heat recovery system Download PDFInfo
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- CN218001553U CN218001553U CN202222533158.8U CN202222533158U CN218001553U CN 218001553 U CN218001553 U CN 218001553U CN 202222533158 U CN202222533158 U CN 202222533158U CN 218001553 U CN218001553 U CN 218001553U
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Abstract
The utility model provides a flue gas waste heat recovery system, comprises a high-temperature flue gas heat exchanger, a desulfurizing tower and a low-temperature flue gas heat exchanger which are sequentially communicated through an air duct; the high-temperature flue gas heat exchanger is communicated with the refrigerator through a first circulating pipeline, and the low-temperature flue gas heat exchanger is communicated with the refrigerator through a second circulating pipeline; the refrigerator is communicated with the heat pump through a third circulating pipeline, and the heat pump is communicated with the heat utilization device through a fourth circulating pipeline. The utility model discloses a flue gas waste heat recovery system has effectively retrieved the industry waste heat of discharging fume of two kinds of different grades, has realized the abundant retrieval and utilization of industry waste heat of discharging fume.
Description
Technical Field
The utility model relates to an energy-concerving and environment-protective technical field especially relates to a flue gas waste heat recovery system.
Background
The Chinese industrial enterprises are not only domestic large fossil energy consumption households, but also the first turn of the national industrial enterprises in terms of the quantity of the fossil energy, the exhaust emission is astronomical, and the thermal pollution problem caused by high-temperature emission of the exhaust is more serious besides certain influence on the quality of the ambient air. In order to improve the energy utilization rate and comprehensively realize the aims of energy conservation and emission reduction, various energy-saving and environment-friendly technologies are applied in recent years. Wherein, the wet desulphurization tower is taken as the main application technology of flue gas desulphurization, and basically realizes the popularization in the field of domestic industrial flue gas treatment. In the aspect of flue gas waste heat recovery, a large amount of engineering practices are also made, and some achievements are obtained at the same time, but the problems existing in practical application are not few, some project flue gas waste heat cannot be fully recovered, for example, low-grade flue gas waste heat cannot be effectively recovered and utilized, and some project flue gas waste heat cannot be fully utilized after being recovered.
In view of the above current situation, in order to fundamentally make up for the defects of the existing flue gas waste heat recovery technology, from the perspective of energy cascade utilization, related researches on deep waste heat recovery systems for industrial discharged waste flue gas are developed, and a set of more effective and more thorough flue gas waste heat recovery system is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a flue gas waste heat recovery system, this flue gas waste heat recovery system have effectively retrieved the industry waste heat of discharging fume of two kinds of different grades, have realized the abundant retrieval and utilization of industry waste heat of discharging fume.
In order to solve the technical problem, the utility model provides a flue gas waste heat recovery system, which comprises a high-temperature flue gas heat exchanger, a desulfurizing tower and a low-temperature flue gas heat exchanger which are sequentially communicated through a wind channel; the high-temperature flue gas heat exchanger is communicated with the refrigerator through a first circulating pipeline, and the low-temperature flue gas heat exchanger is communicated with the refrigerator through a second circulating pipeline; the refrigerator is communicated with the heat pump through a third circulating pipeline, and the heat pump is communicated with the heat utilization device through a fourth circulating pipeline.
Further, the heat pump is connected with a driving energy source.
Furthermore, the driving energy source adopts electric energy, fuel gas or steam.
Further, a first circulating pump is arranged on the first circulating pipeline, a second circulating pump is arranged on the second circulating pipeline, and a third circulating pump is arranged on the third circulating pipeline, and a fourth circulating pump is arranged on the fourth circulating pipeline.
Further, an outlet of the low-temperature flue gas heat exchanger is communicated with a chimney.
Compared with the prior art, the method has the advantages that, the beneficial effects of the utility model reside in that:
1. the flue gas waste heat recovery system of the utility model effectively recovers two kinds of industrial exhaust smoke waste heat with different grades, the system is used for production heating and heating, and realizes full recycling of industrial exhaust smoke waste heat;
2. the flue gas waste heat recovery system of the utility model respectively arranges a flue gas heat exchanger in the inlet and outlet flues of the desulfurizing tower, and as a heat taking device for flue gas waste heat, the flue gas waste heat is converted for energy grade through the refrigerator and the heat pump in sequence, and finally the effective recycling of low-grade flue gas waste heat is realized;
3. the flue gas waste heat recovery system of the utility model takes the cold water produced by the refrigerator as the cooling source of the low-grade flue gas, and can effectively reduce the heat exchange area and the cost of the low-temperature flue gas heat exchanger;
4. the flue gas waste heat recovery system of the utility model takes the hot water produced by the high-temperature flue gas heat exchanger as the driving heat source of the refrigerator, thereby effectively reducing the operating cost of the refrigerator;
5. the utility model discloses a flue gas waste heat recovery system has guaranteed the stable supply of heat pump low temperature heat source with the cooling water of refrigerator as the low temperature heat source of heat pump, is favorable to the high-efficient operation of safety and stability of heat pump.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is the utility model provides a flue gas waste heat recovery system's overall structure schematic diagram.
Description of reference numerals:
1-high temperature flue gas heat exchanger; 2-a desulfurizing tower;
3-low temperature flue gas heat exchanger; 4-a first recycle conduit;
5-a refrigerator; 6-a second recycle conduit;
7-a third recycle conduit; 8-a heat pump;
9-fourth a circulation pipe; 10-a heat-using device;
11-a chimney; 41-a first circulation pump;
61-a second circulation pump; 71-a third circulation pump;
91-a fourth circulation pump; 12-driving energy source.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 to simplify the description, but 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" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; it may be a mechanical connection that is connected to, or may be an electrical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the flue gas waste heat recovery system provided by the present invention comprises a high temperature flue gas heat exchanger 1, a desulfurizing tower 2 and a low temperature flue gas heat exchanger 3 which are sequentially communicated through an air duct; the high-temperature flue gas heat exchanger 1 is communicated with the refrigerator 5 through a first circulating pipeline 4, and the low-temperature flue gas heat exchanger 3 is communicated with the refrigerator 5 through a second circulating pipeline 6; the refrigerator 5 is communicated with a heat pump 8 through a third circulation pipeline 7, and the heat pump 8 is communicated with a heat utilization device 10 through a fourth circulation pipeline 9.
The industrial emission high-temperature flue gas heat exchanger 1 exchanges heat with low-temperature water from a first circulating pipeline 4, the high-temperature flue gas enters a desulfurizing tower 2 through an air duct after releasing heat and cooling, meanwhile, the low-temperature water in the first circulating pipeline 4 absorbs heat and heats and then enters a refrigerating machine 5 to be used as a driving heat source of the refrigerating machine 5, the driving heat source returns to the high-temperature flue gas heat exchanger 1 again through the first circulating pipeline 4 after releasing heat and cooling in the refrigerating machine 5 to start next circulation, the flue gas enters a low-temperature flue gas heat exchanger 3 through the air duct after completing desulfurization treatment in the desulfurizing tower 2, the desulfurized flue gas exchanges heat with cold water from a second circulating pipeline 6, the desulfurized flue gas enters a chimney 11 through the air duct to be discharged to the air after being cooled and cooled, meanwhile, the water in the second circulating pipeline 6 is heated by the flue gas and then returns to the refrigerating machine 5 after releasing heat and cooling, and then returns to the second circulating pipeline 6 in the refrigerating machine 5 to start next circulating process.
Circulating water from the third circulating pipeline 7 enters the refrigerator 5 through a pipeline and is used as cooling water of the refrigerator 5, and the cooling water is heated in the refrigerator 5 and then enters the heat pump 8 through a pipeline and is used as low-temperature heat source water of the heat pump 8; the low-temperature heat source water returns to the third circulating pipeline 7 after releasing heat and reducing temperature in the heat pump 8, starting the next cycle; the heat medium water from the fourth circulation pipeline 9 enters the heat pump 8, the heat medium water is heated in the heat pump 8 through heat absorption and then enters the heat using device 10 through the fourth circulation pipeline 9, the heat medium water is cooled through heat release in the heat using device 10 and then returns to the fourth circulation pipeline 9, and the next circulation process is started. The heated medium of the heat utilization device is heating water of a heat supply network in the heating season, and water supplement or condensed water of a boiler and the like in the non-heating season; in addition, the heat pump 8 is connected with the driving energy source 12, and the driving energy source 12 can adopt electric energy, fuel gas or steam to ensure the normal operation of the heat pump 8.
The flue gas waste heat recovery system effectively recovers two different grades of industrial exhaust smoke waste heat for production heating and heating, and realizes full recycling of the industrial exhaust smoke waste heat; by respectively arranging a flue gas heat exchanger in the inlet flue and the outlet flue of the desulfurizing tower as a heat taking device for flue gas waste heat, the energy grade is converted through the refrigerator 5 and the heat pump 8 in sequence, and finally the effective recycling of the low-grade flue gas waste heat is realized; cold water produced by the refrigerator 5 is used as a cooling source of low-grade flue gas, so that the heat exchange area and the cost of the low-temperature flue gas heat exchanger 3 can be effectively reduced; hot water produced by the high-temperature flue gas heat exchanger 1 is used as a driving heat source of the refrigerator 5, so that the operating cost of the refrigerator 5 is effectively reduced; the cooling water of the refrigerator 5 is used as the low-temperature heat source of the heat pump 8, so that the stable supply of the low-temperature heat source of the heat pump 8 is ensured, and the safe, stable and efficient operation of the heat pump 8 is facilitated.
In addition, it is emphasized that during the heat exchange between the desulfurized flue gas and the cold water from the second circulation pipeline 6, a large amount of flue gas condensate water is separated out from the flue gas, and the flue gas is also deeply purified; in addition, due to the reduction of the water content of the flue gas, the problem of rain drifting of the chimney is improved to a certain extent, and finally, the energy-saving and environment-friendly comprehensive treatment target of industrial flue gas is realized.
On the basis of the above scheme, in this embodiment, the first circulation pipeline is further provided with a first circulation pump 41 on 4, the second circulation pipeline 6 is provided with a second circulation pump 61, the third circulation pipeline 7 is provided with a third circulation pump 71, and the fourth circulation pipeline 9 is provided with a fourth circulation pump 91. The circulating pumps respectively provide circulating power for the circulating pipelines.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (5)
1. A flue gas waste heat recovery system is characterized by comprising a high-temperature flue gas heat exchanger, a desulfurizing tower and a low-temperature flue gas heat exchanger which are sequentially communicated through an air duct; the high-temperature flue gas heat exchanger is communicated with the refrigerator through a first circulating pipeline, and the low-temperature flue gas heat exchanger is communicated with the refrigerator through a second circulating pipeline; the refrigerator is communicated with the heat pump through a third circulating pipeline, and the heat pump is communicated with the heat utilization device through a fourth circulating pipeline.
2. The flue gas waste heat recovery system of claim 1, wherein the heat pump is connected to a driving energy source.
3. The flue gas waste heat recovery system of claim 2, wherein the driving energy source is electric energy, gas or steam.
4. The flue gas waste heat recovery system according to claim 1, wherein a first circulating pump is arranged on the first circulating pipeline, a second circulating pump is arranged on the second circulating pipeline, a third circulating pump is arranged on the third circulating pipeline, and a fourth circulating pump is arranged on the fourth circulating pipeline.
5. The flue gas waste heat recovery system of claim 1, wherein an outlet of the low temperature flue gas heat exchanger is in communication with a chimney.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222533158.8U CN218001553U (en) | 2022-09-22 | 2022-09-22 | Flue gas waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222533158.8U CN218001553U (en) | 2022-09-22 | 2022-09-22 | Flue gas waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218001553U true CN218001553U (en) | 2022-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222533158.8U Active CN218001553U (en) | 2022-09-22 | 2022-09-22 | Flue gas waste heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218001553U (en) |
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2022
- 2022-09-22 CN CN202222533158.8U patent/CN218001553U/en active Active
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