CN114322039A - Heat exchange unit for steam heat supply - Google Patents
Heat exchange unit for steam heat supply Download PDFInfo
- Publication number
- CN114322039A CN114322039A CN202111637706.5A CN202111637706A CN114322039A CN 114322039 A CN114322039 A CN 114322039A CN 202111637706 A CN202111637706 A CN 202111637706A CN 114322039 A CN114322039 A CN 114322039A
- Authority
- CN
- China
- Prior art keywords
- heat
- steam
- heat exchange
- exchange device
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention provides a heat exchange unit for steam heating, which comprises: the steam heat source is connected with the ejector to supply heat for the heat utilization unit, the steam heat source is connected with the heat exchange device to serve as a heat source of the heat exchange device, the heat utilization unit is connected with the heat exchange device, and heat supply network return water generated by the heat utilization unit is heated by the heat exchange device and is mixed with steam condensate water generated by the heat exchange device and then is connected with the ejector.
Description
Technical Field
The invention relates to the technical field of steam heat supply, in particular to a heat exchange unit for steam heat supply.
Background
In a conventional steam centralized heating system, high-temperature and high-pressure steam is output by a power plant and is conveyed to each heat exchange station in a city through a long-distance steam pipeline, a steam-water heat exchange device is installed in each heat exchange station, and a steam heat source exchanges heat with secondary net water; because the distance is far away, the conveying cost of the condensed water returning to the power plant is high, and the condensed water after steam heat exchange is generally not recovered and is directly discharged outdoors, so that the energy waste is caused.
The existing condensate waste heat recovery technology is to use steam condensate to replace secondary network water supplement or provide domestic hot water for nearby communities; however, because the secondary network requires less water supply or only a small number of cells have the requirement for domestic hot water, the method can only recover a small amount of waste heat of steam condensate, and the residual waste heat of condensate needs to be discharged outside, thereby causing energy waste.
Disclosure of Invention
The invention aims to provide a heat exchanger unit for steam heating, which can solve the problems;
the invention provides a heat exchange unit for steam heating, which comprises: the steam heat source is connected with the ejector to supply heat for the heat utilization unit, the steam heat source is connected with the heat exchange device to serve as a heat source of the heat exchange device, the heat utilization unit is connected with the heat exchange device, and heat supply network return water generated by the heat utilization unit is heated by the heat exchange device, mixed with steam condensate water generated by the heat exchange device and then connected with the ejector.
In a preferred embodiment, the flow rate of the steam generated by the steam heat source is divided into two paths, wherein one path is connected with the ejector, and the other path is connected with the heat exchange device.
In a preferred embodiment, the ejector is connected to the heat using unit through a water supply pipe, the heat using unit is connected to the heat exchanging device through a water return pipe, and the heat exchanging device is connected to the ejector through a mixing pipe.
In a preferred embodiment, the steam heat source is connected with the heat exchange device through a steam heat source branch pipe, and steam condensate generated by the heat exchange device is connected with the mixing pipe through the condensate pipe.
In a preferred embodiment, the water return pipe is connected with a drainage pump connected with the heat exchange device, and the heat exchange device absorbs and discharges residual heat in the return water of the heat supply network.
In a preferred embodiment, a pressure gauge is provided on the water supply pipe or the water return pipe.
In a preferred embodiment, the injector is a jet heater.
In a preferred embodiment, the heat exchange device is an absorption heat pump.
According to the technical scheme, the return water of the heat supply network is heated by the heat exchange device and then mixed with the steam condensate with higher temperature generated by the heat exchange device, and then enters the ejector to be mixed with the steam heat source for heat exchange, so that the waste heat of the steam condensate is recovered, the steam condensate can be directly used for supplying water to the heat supply network, and the water supply amount of the heat supply network is reduced.
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 description of the embodiments or 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 other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic connection diagram of a steam-heated heat exchanger unit according to the present invention;
description of reference numerals:
1. a steam heat source; 2. an ejector; 3. a water supply pipe; 4. a heat unit; 5. a water return pipe; 6. draining pump; 7. a heat exchange device; 8. a water condensation pipe; 9. a mixing tube; 10. a steam heat source branch pipe.
Detailed Description
The technical solutions 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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 and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered 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 defined 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; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the present invention provides a heat exchanger unit for steam heating, comprising: the steam heat source 1 is high-temperature and high-pressure steam output by a power plant, the steam heat source 1 is connected with the ejector 2 to serve as a heat source of the ejector 2, the ejector 2 is connected with the heat utilization unit 4 to supply heat to the heat utilization unit 4, the steam heat source 1 is connected with the heat exchange device 7 to serve as a heat source of the heat exchange device 7, the ejector 2 is an injection type heater, the injection type heater enables steam to be jetted through a nozzle, water serves as injected fluid, a surface type steam-water heater and a circulating water pump can be replaced, and the effects of saving coal, electricity and equipment investment are achieved. When steam passes through the nozzle of the jet heater, the pressure is reduced, the flow rate is increased, a low-pressure area is formed at the outlet of the nozzle, heated water enters the heater in the area and is mixed with the steam, the steam is condensed in water to release heat, energy, momentum and mass are exchanged between the steam and the water, then a steam-water mixture enters a mixing chamber to be further uniformly mixed, and finally enters a pressure expansion chamber to reduce the flow rate of the water and increase the pressure, so that the process of heating the water is completed. The heat exchanger 7 is an absorption heat pump, which is a circulating system that uses low-grade heat source to pump heat from low-temperature heat source to high-temperature heat source, and is an effective device for recycling low-temperature heat energy, and has dual functions of saving energy and protecting environment, and uses a small amount of high-temperature heat source (such as steam, high-temperature hot water, combustible gas combustion heat, etc.) as a driving heat source to generate a large amount of middle-temperature useful heat energy. Namely, the high-temperature heat energy is used for driving, the heat energy of the low-temperature heat source is increased to the medium temperature, and therefore the utilization efficiency of the heat energy is improved. The coefficient of performance of the absorption heat pump is larger than 1, and is generally 1.5-2.5. The steam provided by the steam heat source 1 is used to drive the absorption heat pump.
The heat utilization unit 4 is connected with the heat exchange device 7, and the return water of the heat supply network generated by the heat utilization unit 4 is heated by the heat exchange device 7, mixed with the steam condensate generated by the heat exchange device 7 and then connected with the ejector 2. The temperature of the heat supply network water supply is reduced into heat supply network backwater after the heat supply network water supply is used by the heat using unit 4, and the heat supply network backwater is heated by the heat exchange device 7 and then is mixed with the steam condensate with higher temperature, so that the waste heat of the steam condensate is recovered, the steam condensate can be directly used for supplying water to the heat supply network, and the water supply amount of the heat supply network is reduced; the mixed water enters an ejector 2 to be mixed with a steam heat source 1 for heat exchange, and the temperature rises to reach the water supply temperature to supply heat for a heat utilization unit 4.
The steam flow provided by the steam heat source 1 is divided into two paths which can be connected through a tee joint, wherein one path is connected with the ejector 2, and the other path is connected with the heat exchange device 7.
The steam heat source 1 is connected with the ejector 2, the ejector 2 is connected with the heat utilization unit 4 through the water supply pipe 3, the heat utilization unit 4 is connected with the heat exchange device 7 through the water return pipe 5, and the heat exchange device 7 is connected with the ejector 2 through the mixing pipe 9.
The steam heat source 1 is connected with the heat exchange device 7 through the steam heat source branch pipe 10 and serves as a driving heat source to generate steam condensate after heat exchange, and the steam condensate generated by the heat exchange device 7 is connected with the mixing pipe 9 through the condensate pipe 8, so that the temperature of return water of a heat supply network is increased, and waste heat of the steam condensate is recovered.
The water return pipe 5 is connected with a draining pump 6 connected with a heat exchange device 7, and the heat exchange device 7 absorbs the residual heat in the return water of the heat supply network and discharges the residual heat. A pressure gauge is arranged on the water supply pipe 3 or the water return pipe 5. Because the steam condensate water is mixed with the heat supply network backwater to supplement water for the heat supply network, the pressure in the heat supply network is increased, the pressure condition of a heat supply network system needs to be judged according to the pressure value of the pressure gauge to drain water, and the absorption heat pump absorbs the heat of the heat supply network backwater waste heat sucked out by the drainage pump 6 and then discharges the heat.
The steam heat source 1 is connected with a heat utilization unit 4 through an ejector 2, and the ejector 2 provides water for a heat supply network to supply heat source and circulating power.
The outlet end of the mixing tube 9 is connected to the ejector 2. The return water of the heat supply network is heated by the absorption heat pump and then mixed with the steam condensate to heat again, and the return water of the heat supply network is mixed with the steam provided by the steam heat source 1 in the ejector 2 to exchange heat to reach the heat supply temperature so as to supply heat for the heat utilization unit 4.
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; while the invention has been described in detail and with reference to the foregoing embodiments, it will 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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A heat exchanger unit of steam heating supply which characterized in that includes: the steam heat source is connected with the ejector to supply heat for the heat utilization unit, the steam heat source is connected with the heat exchange device to serve as a heat source of the heat exchange device, the heat utilization unit is connected with the heat exchange device, and heat supply network return water generated by the heat utilization unit is heated by the heat exchange device, mixed with steam condensate water generated by the heat exchange device and then connected with the ejector.
2. A steam-heated heat exchanger unit as claimed in claim 1, wherein the steam flow provided by the steam heat source is divided into two paths, one of which is connected to the ejector and the other of which is connected to the heat exchanger.
3. A steam-heated heat exchanger unit as claimed in claim 1, wherein the ejector is connected to the heat-using unit through a water supply pipe, the heat-using unit is connected to the heat exchanging means through a water return pipe, and the heat exchanging means is connected to the ejector through a mixing pipe.
4. The steam-heated heat exchange unit as claimed in claim 3, wherein the steam heat source is connected to the heat exchange device through a steam heat source branch pipe, and steam condensate generated by the heat exchange device is connected to the mixing pipe through the condensate pipe.
5. The steam-heating heat exchanger unit as claimed in claim 3, wherein the water return pipe is connected to a drain pump connected to the heat exchanger, and the heat exchanger absorbs and discharges residual heat in the return water of the heat supply network.
6. A steam-heated heat exchanger unit as claimed in claim 5, wherein a pressure gauge is provided on the water supply pipe or the water return pipe.
7. A steam-heated heat exchanger block as claimed in claim 1, wherein the injector is a jet heater.
8. A steam-heated heat exchanger unit as claimed in any one of claims 1 to 7, wherein the heat exchange means is an absorption heat pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111637706.5A CN114322039B (en) | 2021-12-29 | 2021-12-29 | Heat exchange unit for steam heat supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111637706.5A CN114322039B (en) | 2021-12-29 | 2021-12-29 | Heat exchange unit for steam heat supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114322039A true CN114322039A (en) | 2022-04-12 |
| CN114322039B CN114322039B (en) | 2023-10-13 |
Family
ID=81017604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111637706.5A Active CN114322039B (en) | 2021-12-29 | 2021-12-29 | Heat exchange unit for steam heat supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114322039B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101240909A (en) * | 2008-03-19 | 2008-08-13 | 清华大学 | Steam jet type heat pump heat distribution system for recovering thermal power plant condensing residual heat |
| CN102519069A (en) * | 2011-12-08 | 2012-06-27 | 北京中科华誉能源技术发展有限责任公司 | Multi-effect cascade jet type heat exchange based exhaust steam waste heat recovering and heat and power jointly producing system |
| CN105953285A (en) * | 2016-06-25 | 2016-09-21 | 郝炜 | Distributed large-temperature-difference heat supply system |
| CN107166475A (en) * | 2016-03-08 | 2017-09-15 | 哈尔滨工大金涛科技股份有限公司 | Big temperature difference heat-exchange method and big temperature difference heat-exchanger rig |
| CN107461958A (en) * | 2017-08-13 | 2017-12-12 | 中清源环保节能有限公司 | One kind utilizes jet type heat pump recovery chemical fertilizer factory gas making water residual heat system |
| CN107702182A (en) * | 2017-09-01 | 2018-02-16 | 中清源环保节能有限公司 | A kind of big temperature difference recovery exhaust steam residual heat system in coal-burning power plant's heat supply initial station |
| CN108286728A (en) * | 2018-03-28 | 2018-07-17 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of power plant's step heating system |
| US20200149433A1 (en) * | 2018-04-19 | 2020-05-14 | Uni-Rising(Beijing) Technology Co., Ltd. | Exhaust steam waste heat recovering and supplying system of air-cooling units in large thermal power plants |
-
2021
- 2021-12-29 CN CN202111637706.5A patent/CN114322039B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101240909A (en) * | 2008-03-19 | 2008-08-13 | 清华大学 | Steam jet type heat pump heat distribution system for recovering thermal power plant condensing residual heat |
| CN102519069A (en) * | 2011-12-08 | 2012-06-27 | 北京中科华誉能源技术发展有限责任公司 | Multi-effect cascade jet type heat exchange based exhaust steam waste heat recovering and heat and power jointly producing system |
| CN107166475A (en) * | 2016-03-08 | 2017-09-15 | 哈尔滨工大金涛科技股份有限公司 | Big temperature difference heat-exchange method and big temperature difference heat-exchanger rig |
| CN105953285A (en) * | 2016-06-25 | 2016-09-21 | 郝炜 | Distributed large-temperature-difference heat supply system |
| CN107461958A (en) * | 2017-08-13 | 2017-12-12 | 中清源环保节能有限公司 | One kind utilizes jet type heat pump recovery chemical fertilizer factory gas making water residual heat system |
| CN107702182A (en) * | 2017-09-01 | 2018-02-16 | 中清源环保节能有限公司 | A kind of big temperature difference recovery exhaust steam residual heat system in coal-burning power plant's heat supply initial station |
| CN108286728A (en) * | 2018-03-28 | 2018-07-17 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of power plant's step heating system |
| US20200149433A1 (en) * | 2018-04-19 | 2020-05-14 | Uni-Rising(Beijing) Technology Co., Ltd. | Exhaust steam waste heat recovering and supplying system of air-cooling units in large thermal power plants |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114322039B (en) | 2023-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106765448A (en) | A kind of energy-saving heating system for reducing heat supply return water temperature | |
| CN105222146A (en) | A kind of flue gas waste heat recovery apparatus | |
| CN203099962U (en) | Circulating-water direct heating system of thermal power plant | |
| CN205065770U (en) | Flue gas waste heat recovery device | |
| CN210921792U (en) | Condensing gas-fired hot water boiler | |
| CN105222203A (en) | A kind of novel gas cogeneration of heat and power central heating device | |
| CN105546842B (en) | Efficient solar flat-board endothermic system | |
| CN114322039A (en) | Heat exchange unit for steam heat supply | |
| CN109026220A (en) | A kind of hot energy storage cogeneration system of thermoelectricity decoupling type | |
| CN105972673A (en) | Relay energy station type large-temperature-difference heat supply system and method | |
| CN202253581U (en) | Energy-saving softened water heating device for thermal power plant | |
| CN205119199U (en) | Novel gas cogeneration of heat and power central heating device | |
| CN209293865U (en) | A kind of hot energy storage cogeneration system of thermoelectricity decoupling type | |
| CN212132921U (en) | Heat absorption device combining jet flow and convective heat transfer | |
| CN114216156A (en) | Large-temperature-difference long-distance heat supply system and control method thereof | |
| CN114263509A (en) | Turbine reheating system based on molten salt heating | |
| CN208024414U (en) | A kind of generating plant circulation-water heat recovery auxiliary temperature-reducing system | |
| CN114484485B (en) | Flue gas waste heat recycling system and method for thermal power plant | |
| CN219691641U (en) | Cold and hot coupled system of gas turbine power plant and LNG station | |
| CN217109726U (en) | Heating system | |
| CN220366403U (en) | Low-grade waste heat self-coupling utilization system of gas steam boiler | |
| CN221724679U (en) | Indirect air cooling system | |
| CN211695943U (en) | Residual steam waste heat energy-saving system capable of providing domestic water | |
| CN209558318U (en) | Boiler heat recovery system | |
| CN220818491U (en) | Preheating recovery system of lime shaft kiln |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |