CN116379494A - Large-temperature-difference long-distance heat supply system considering industrial heat - Google Patents
Large-temperature-difference long-distance heat supply system considering industrial heat Download PDFInfo
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- CN116379494A CN116379494A CN202310297708.7A CN202310297708A CN116379494A CN 116379494 A CN116379494 A CN 116379494A CN 202310297708 A CN202310297708 A CN 202310297708A CN 116379494 A CN116379494 A CN 116379494A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 238000010521 absorption reaction Methods 0.000 claims abstract description 53
- 239000008235 industrial water Substances 0.000 claims abstract description 17
- 230000001502 supplementing effect Effects 0.000 claims abstract description 5
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 239000013589 supplement Substances 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 abstract description 17
- 238000010438 heat treatment Methods 0.000 abstract description 13
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
- F22B3/06—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass by transformation of mechanical, e.g. kinetic, energy into heat energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
Abstract
A large-temperature-difference long-distance heat supply system considering industrial heat relates to the technical field of heat supply. The invention comprises a large temperature difference heat exchanger unit and a heating type absorption heat pump. The heat supply network water enters the large-temperature difference heat exchange unit for heat exchange through the temperature rising type absorption heat pump and the hot water pipeline, and then flows back to the temperature rising type absorption heat pump through the hot water pipeline for cooling to generate heat supply network low-temperature backwater for outflow. The large-temperature difference heat exchanger unit is respectively connected with secondary heat supply network backwater and secondary heat supply network water supply; the temperature-rising type absorption heat pump is respectively connected with industrial backwater and industrial water supply, wherein the industrial backwater is industrial heat supply network backwater or industrial steam water supplementing, and the industrial water supply is industrial heat supply network water supply or industrial steam. Compared with the prior art, the invention utilizes the existing hot water pipe network and the absorption type large-temperature-difference heat exchanger unit, combines the temperature-rising type absorption heat pump to realize the preparation of industrial heat (hot water and steam), effectively improves the economical efficiency of the system and expands the application scene of the temperature-rising type absorption heat pump.
Description
Technical Field
The invention relates to the technical field of heat supply, in particular to a long-distance heat supply system with large temperature difference and considering industrial heat (hot water and steam).
Background
Along with the rapid development of market economy in China, the demand of industrial enterprises for steam is also continuously rising. Because of the advantages of high comprehensive utilization rate of energy, energy conservation, environmental protection and the like, the residual steam generated by power generation can be effectively utilized, the cogeneration central heating has become an important development trend of regional heating in China, and meanwhile, the long-distance pipe network conveying capacity also gradually becomes a difficult problem on a central heating development road.
The central heating system mainly comprises a heat source, a heating pipe network and heat users. The heat supply pipe network plays a role of timely delivering heat of a heat source to each heat user, and is a bridge and a life line for connecting the heat source and the life line. Because the distance between the power plant (heat source plant) and the heat user is relatively far, many areas even exceed the economic heat supply radius of the power plant, and pressure loss and heat loss are necessarily present along the pipeline, after the power plant steam is conveyed in a long distance, the power plant steam is difficult to meet the requirement of the end user on high steam consumption parameters.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a large-temperature-difference long-distance heat supply system considering industrial heat. The method utilizes the existing hot water pipe network and the absorption type large-temperature-difference heat exchanger unit, combines the temperature-rising type absorption heat pump to realize the preparation of industrial heat (hot water and steam), effectively improves the economical efficiency of the system and expands the application scene of the temperature-rising type absorption heat pump.
In order to achieve the above object, the technical solution of the present invention is realized in two ways as follows:
mode one
The large-temperature-difference long-distance heat supply system taking industrial heat into consideration is structurally characterized by comprising a large-temperature-difference heat exchanger unit and a heating type absorption heat pump. The heat supply network water enters the large-temperature difference heat exchange unit for heat exchange through the temperature rising type absorption heat pump and the hot water pipeline, and then flows back to the temperature rising type absorption heat pump through the hot water pipeline for cooling to generate heat supply network low-temperature backwater for outflow. The large-temperature difference heat exchanger unit is respectively connected with secondary heat supply network backwater and secondary heat supply network water supply; the temperature-rising type absorption heat pump is respectively connected with industrial backwater and industrial water supply, wherein the industrial backwater is industrial heat supply network backwater or industrial steam water supplementing, and the industrial water supply is industrial heat supply network water supply or industrial steam.
In the large-temperature-difference long-distance heat supply system considering industrial heat, the large-temperature-difference heat exchanger unit adopts an absorption type large-temperature-difference heat exchanger unit or a compression type large-temperature-difference heat exchanger unit.
Mode two
The large-temperature-difference long-distance heat supply system taking industrial heat into consideration is structurally characterized by comprising a large-temperature-difference heat exchanger unit and a heating type absorption heat pump. The water supply of the heat supply network enters the large-temperature difference heat exchange unit through the temperature rising type absorption heat pump and the hot water pipeline for heat exchange, and then flows back to the temperature rising type absorption heat pump through the hot water pipeline for cooling to form low-temperature backwater of the heat supply network for outflow. The large-temperature difference heat exchanger unit is respectively connected with secondary heat supply network backwater and secondary heat supply network water supply; the temperature-rising type absorption heat pump is respectively connected with industrial backwater and industrial water supply, wherein the industrial backwater supplements water for industrial steam, and the industrial water supply is industrial steam. Industrial water is passed through a steam recompression unit to produce high grade industrial steam.
In the large-temperature-difference long-distance heat supply system considering industrial heat, the large-temperature-difference heat exchanger unit adopts an absorption type large-temperature-difference heat exchanger unit or a compression type large-temperature-difference heat exchanger unit.
Due to the adoption of the structure, the invention has the following beneficial effects compared with the prior art:
1. the invention can be applied to the industrial heat field to prepare high-temperature hot water or steam in the long-distance transportation process of hot water, and compared with the direct transportation of high-temperature hot water or steam, the invention greatly reduces the preparation cost and the on-way loss, realizes the long-distance transportation of the industrial hot water or steam by hundreds of kilometers, and breaks the transportation bottleneck of the existing industrial hot water or steam.
2. Compared with the existing steam delivery and distribution, the invention adopts the water of the large-temperature-difference long-distance delivery system as the heat carrier, thereby preparing high-temperature hot water or steam according to the needs, and avoiding the unmatched application of heat.
3. In order to avoid the loss of the conveying process, the industrial hot water is basically prepared on site at the present stage by adopting a principle of nearby use or is prepared by adopting high-grade industrial steam by adopting a steam-water heat exchanger, so that huge heat exchange waste and conveying restriction exist. The invention adopts a mode of combining a long-distance-transmission large-temperature-difference system with the temperature-rising type absorption heat pump to prepare the higher-grade industrial hot water by using the hot water, and effectively solves the problems of transmission and distribution limitation of the industrial hot water and mismatching of energy utilization.
4. The industrial hot water or steam can be prepared by adopting a mode of combining the temperature rising type absorption heat pump with the long-distance transportation large-temperature-difference heating system, so that the pipe network and the equipment utilization rate can be effectively improved, and the economy of the heating system can be effectively improved.
5. Compared with the conventional use mode of the temperature-rising type absorption heat pump, the invention performs full waste heat recovery on cooling and radiating of the temperature-rising type absorption heat pump, avoids heat loss, eliminates heat pollution and realizes zero waste heat emission in the use process of the temperature-rising type absorption heat pump.
The invention is further described below with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Detailed Description
Example 1
Referring to fig. 1, the invention provides a large-temperature-difference long-distance heat supply system taking industrial heat into consideration, which comprises a large-temperature-difference heat exchanger unit 5 and a heating type absorption heat pump 4, wherein the large-temperature-difference heat exchanger unit 5 adopts an absorption type large-temperature-difference heat exchanger unit or a compression type large-temperature-difference heat exchanger unit. The heat supply network water supply 1.1 enters the large temperature difference heat exchanger unit 5 through the temperature rising type absorption heat pump 4 and the hot water pipeline to exchange heat, and then flows back to the temperature rising type absorption heat pump 4 through the hot water pipeline to cool and generate heat supply network low-temperature backwater 1.4 to flow out. The large-temperature difference heat exchanger unit 5 is respectively connected with the secondary heat supply network backwater 2.1 and the secondary heat supply network water supply 2.2; the temperature rising type absorption heat pump 4 is respectively connected with the industrial backwater 3.1 and the industrial water supply 3.2, the industrial backwater 3.1 is industrial heat supply network backwater or industrial steam water supplementing, and the industrial water supply 3.2 is industrial heat supply network water or industrial steam.
Example two
Referring to fig. 2, the invention provides a large-temperature-difference long-distance heat supply system taking industrial heat into consideration, which comprises a large-temperature-difference heat exchanger unit 5 and a heating type absorption heat pump 4, wherein the large-temperature-difference heat exchanger unit 5 adopts an absorption type large-temperature-difference heat exchanger unit or a compression type large-temperature-difference heat exchanger unit. The heat supply network water supply 1.1 enters the large temperature difference heat exchanger unit 5 through the temperature rising type absorption heat pump 4 and the hot water pipeline to exchange heat, and then flows back to the temperature rising type absorption heat pump 4 through the hot water pipeline to cool and generate heat supply network low-temperature backwater 1.4 to flow out. The large-temperature difference heat exchanger unit 5 is respectively connected with the secondary heat supply network backwater 2.1 and the secondary heat supply network water supply 2.2; the temperature rising type absorption heat pump 4 is respectively connected with industrial backwater 3.1 and industrial water supply 3.2, wherein the industrial backwater 3.1 is industrial steam water supplementing, and the industrial water supply 3.2 is industrial steam. The industrial water supply 3.2 produces high grade industrial steam 3.3 via a steam recompression unit 6.
When the system works, the heat supply network water supply 1.1 passes through the temperature rising type absorption heat pump 4, the temperature is reduced to hot water 1.2, the hot water enters the absorption type large temperature difference heat exchanger unit 5, the heat exchange temperature is reduced to low temperature water 1.3, the hot water passes through the temperature rising type absorption heat pump 4 again, and the temperature is raised to the heat supply network low temperature backwater 1.4 and flows out.
The absorption type large-temperature-difference heat exchanger unit 5 replaces the heat of the hot water 1.2 flowing out from the temperature-rising type absorption heat pump 4 to the secondary heat supply network backwater 2.1, so that the temperature of the water is raised to the secondary heat supply network water 2.2, and meanwhile, the low-temperature water 1.3 is obtained.
The heating type absorption heat pump 4 extracts part of heat of the heat supply network water supply 1.1 to the industrial steam water supply 3.1 to obtain high-temperature industrial steam 3.2, and simultaneously transfers the other part of heat of the heat supply network water supply 1.1 to the low-temperature water 1.3.
The industrial steam 3.2 can adopt a steam recompression unit to do additional work to the industrial steam, so as to obtain the higher-grade industrial steam 3.3.
The system realizes the large-temperature-difference heat exchange of hot water through the absorption type large-temperature-difference heat exchanger unit, and realizes the long-distance transportation of the hot water. The temperature rising type absorption heat pump uses hot water as a drive, and uses low-temperature backwater obtained by heat exchange with large temperature difference as cooling water to prepare high-temperature hot water or steam. The system may or may not have a vapor compressor depending on the vapor parameters required at the end. The system can also be provided with control components such as pumps, valves and other auxiliary devices as required.
The invention has been described above with reference to embodiments thereof, but these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. The scope of the invention is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be made by those skilled in the art without departing from the scope of the invention, and such alternatives and modifications are intended to fall within the scope of the invention.
Claims (4)
1. The large-temperature-difference long-distance heat supply system taking industrial heat into consideration is characterized by comprising a large-temperature-difference heat exchanger unit (5) and a temperature-rising type absorption heat pump (4); the heat supply network water supply (1.1) enters a large-temperature-difference heat exchanger unit (5) through a temperature-rising type absorption heat pump (4) and a hot water pipeline to exchange heat, and then flows back to the temperature-rising type absorption heat pump (4) through the hot water pipeline to cool so as to generate heat supply network low-temperature backwater (1.4) to flow out; the large-temperature-difference heat exchanger unit (5) is respectively connected with secondary heat supply network backwater (2.1) and secondary heat supply network water supply (2.2); the temperature-rising type absorption heat pump (4) is respectively connected with industrial backwater (3.1) and industrial water supply (3.2), the industrial backwater (3.1) is industrial heat supply network backwater or industrial steam water supplementing, and the industrial water supply (3.2) is industrial heat supply network water supply or industrial steam.
2. The large-temperature-difference long-distance heat supply system taking industrial heat into account according to claim 1, wherein the large-temperature-difference heat exchanger unit (5) adopts an absorption type large-temperature-difference heat exchanger unit or a compression type large-temperature-difference heat exchanger unit.
3. The large-temperature-difference long-distance heat supply system taking industrial heat into consideration is characterized by comprising a large-temperature-difference heat exchanger unit (5) and a temperature-rising type absorption heat pump (4); the heat supply network water supply (1.1) enters a large-temperature-difference heat exchanger unit (5) through a temperature-rising type absorption heat pump (4) and a hot water pipeline to exchange heat, and then flows back to the temperature-rising type absorption heat pump (4) through the hot water pipeline to cool so as to generate heat supply network low-temperature backwater (1.4) to flow out; the large-temperature-difference heat exchanger unit (5) is respectively connected with secondary heat supply network backwater (2.1) and secondary heat supply network water supply (2.2); the temperature-rising type absorption heat pump (4) is respectively connected with industrial backwater (3.1) and industrial water supply (3.2), the industrial backwater (3.1) supplements water for industrial steam, and the industrial water supply (3.2) is industrial steam; the industrial water supply (3.2) generates high-grade industrial steam (3.3) through a steam recompression unit (6).
4. A large temperature difference long-distance heat supply system taking industrial heat into account according to claim 3, wherein the large temperature difference heat exchanger unit (5) adopts an absorption type large temperature difference heat exchanger unit or a compression type large temperature difference heat exchanger unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310297708.7A CN116379494A (en) | 2023-03-24 | 2023-03-24 | Large-temperature-difference long-distance heat supply system considering industrial heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310297708.7A CN116379494A (en) | 2023-03-24 | 2023-03-24 | Large-temperature-difference long-distance heat supply system considering industrial heat |
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| Publication Number | Publication Date |
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| CN116379494A true CN116379494A (en) | 2023-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310297708.7A Pending CN116379494A (en) | 2023-03-24 | 2023-03-24 | Large-temperature-difference long-distance heat supply system considering industrial heat |
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| CN (1) | CN116379494A (en) |
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- 2023-03-24 CN CN202310297708.7A patent/CN116379494A/en active Pending
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