CN115076751A - Heating system and regional heating network - Google Patents
Heating system and regional heating network Download PDFInfo
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- CN115076751A CN115076751A CN202210706459.8A CN202210706459A CN115076751A CN 115076751 A CN115076751 A CN 115076751A CN 202210706459 A CN202210706459 A CN 202210706459A CN 115076751 A CN115076751 A CN 115076751A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 135
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 31
- 239000002918 waste heat Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 abstract description 4
- 239000008400 supply water Substances 0.000 description 6
- 239000008236 heating water Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
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- 238000004134 energy conservation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
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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
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
- F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
- F24D11/0235—Central heating systems using heat accumulated in storage masses using heat pumps water heating system with recuperation of waste energy
- F24D11/025—Central heating systems using heat accumulated in storage masses using heat pumps water heating system with recuperation of waste energy contained in waste water
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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
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
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Abstract
The application provides a heating system and a regional heating network, which relate to the technical field of heating and comprise a heating device; the circulating pipeline is communicated with the heating device, and the working medium provided by the heating device circulates in the circulating pipeline; a plurality of thermal loads, each thermal load being diverted from the circulation line and returned to the circulation line; wherein the return point of one of the plurality of thermal loads is located on an upstream side of the split point of another one of the plurality of thermal loads. According to the heating system provided by the application, the temperature of the working medium in the circulating pipeline after passing through a plurality of heat loads can be reduced, the problem that the return water temperature of a primary network is high is fundamentally solved, the heat conveying capacity of the primary network is improved, the heating flow of the working medium provided by the heating device is increased or the heating difference is increased, the multi-stage heating mode that one is the primary and the other is the primary can be realized, the novel method for realizing step multi-source heating in the heat exchange station is further realized, and a space is provided for low-temperature heat energy to enter a pipe network.
Description
Technical Field
The application relates to the technical field of heat supply, in particular to a heat supply system.
Background
With the rapid development of cities, the heat supply area is rapidly increased, and the problem of centralized clean green heat supply needs to be solved urgently. Bottlenecks occur in the pipeline network transportation of part of regions, and meanwhile, the pressure is increased along with energy conservation and emission reduction. Under the premise of protecting the environment, the construction of boiler rooms and the construction of coal-fired power plants are controlled in multiple places, and dispersed small boilers are gradually banned. The existing conventional heating mode cannot meet the current development condition. The temperature difference between the existing heating water and the temperature difference between the existing supply water and the existing return water is limited by a heating network, the heat transfer capacity is limited within a certain range, and the temperature of the return water of a primary network is still very high.
Therefore, reducing the temperature of a pipe network becomes one of the methods for solving the current heat supply problem, the prior art cannot radically reduce the temperature of return water of a primary network, and in addition, a large amount of low-temperature residual and waste heat energy in an area cannot enter the primary network due to low outlet water temperature and cannot be utilized, so that the energy utilization principle of 'quality correspondence, gradient utilization and temperature opening alignment' is not met.
Disclosure of Invention
In view of this, this application provides a heating system, and the purpose is, reduces primary network return water temperature.
In a first aspect, the present application provides a heating system comprising:
a heating device;
the circulating pipeline is communicated with the heating device, and the working medium provided by the heating device circulates in the circulating pipeline;
a plurality of heat loads, each of the heat loads being diverted from the recycle line and returned to the recycle line;
wherein a return point of one of the plurality of thermal loads is located on an upstream side of a branch point of another one of the plurality of thermal loads.
According to the heat supply system provided by the application, the working medium flowing back from one of the heat loads participates in the heat transfer of the other heat load, so that the temperature of the working medium in the circulating pipeline after passing through the heat loads can be reduced, the problem that the return water temperature of the primary network is high is fundamentally solved, the heat transfer capacity of the primary network is improved, and a space is provided for low-temperature heat energy to enter a pipe network (namely the primary network).
In the prior art, any branch point of the multiple heat loads is located at the upstream side of all the return points of the multiple heat loads, as mentioned in the background of the present application, the return water temperature of the primary network is still high, in the prior art, the outlet water temperature of the heat pump device is usually about 70 degrees celsius, and the return water temperature of the primary network in the prior art has already reached about 60 degrees celsius, which results in that it is difficult to add the heat pump device described below to the primary network without greatly adjusting the structure of the circulation pipeline of the primary network to introduce low-temperature heat energy to heat the return water of the primary network, which is also mentioned in the background of the present application, "a large amount of residual low-temperature and waste heat energy in the area cannot enter the primary network due to the low outlet water temperature", and "greatly adjusting" here means that the area through which the circulation pipeline of the primary network is laid is large, The distance of the pipeline used for laying is long, the diameter of the pipeline used for laying is large, and the cost generated by adjusting the laying structure of the primary net is particularly high.
However, according to the heating system provided by the present application, as mentioned above, since the return water temperature of the primary network is fundamentally reduced, the heat pump device serving to introduce low-temperature heat energy can be easily added to the existing primary network, and the actual range of the pipeline laying adjustment is only the adjustment of the diversion and return pipelines of the heat load, which is usually about several hundred meters in the prior art, and the adjustment of the diversion and return pipelines of the heat load can be very small compared with the kilometer-scale length adjustment of the circulation pipeline of the primary network, which is particularly effective in saving the pipeline, and the heat pump device can be used to integrate and utilize the residual and waste heat energy in the area where the primary network is located, so as to meet the energy utilization principle of 'quality correspondence, gradient utilization, temperature opening'.
Preferably, the heating system further includes a heat pump device disposed in the circulation line, the heat pump device including a low-temperature heat source and a driving source, the heat pump device being configured to heat the working medium in the circulation line, the heat pump device being disposed on a downstream side of a most downstream side return point among the plurality of heat loads.
Preferably, the heating system further includes a heat supply network flow increment heater provided in the circulation line, the heat supply network flow increment heater being provided on an upstream side of a branching point on an uppermost upstream side among the plurality of heat loads.
Preferably, the heating system further comprises a heat grid peak shaving heat station disposed in the circulation line, the heat grid peak shaving heat station is disposed on an upstream side of a branch point on an uppermost upstream side among the plurality of heat loads, and the heat grid peak shaving heat station is disposed on a downstream side of the heat grid flow incremental heater.
Preferably, the heat supply system further includes a heat supply network return water heat outward-transferring heat exchange station, the heat supply network return water heat outward-transferring heat exchange station is disposed on a downstream side of a return point on a most downstream side of the plurality of heat loads, the heat supply network return water heat outward-transferring heat exchange station is disposed on an upstream side of the heat pump device, and the heat supply network return water heat outward-transferring heat exchange station is configured to supply the working medium in the circulation pipeline to the outside to be used as a heat source.
Preferably, the heat supply network backwater heat output heat exchange station is used for supplying working media in the circulating pipeline to the outside so as to be used as a heat supply heat source or a low-temperature heat source of the heat pump.
Preferably, the heat supply system further comprises a heat supply network backwater waste heat heating station, the heat supply network backwater waste heat heating station is arranged on the downstream side of the most downstream side backflow point in the plurality of heat loads, the heat supply network backwater waste heat heating station is arranged on the upstream side of the heat pump device, and the heat supply network backwater waste heat heating station is used for heating the working medium in the circulation pipeline by using an external waste heat device.
Preferably, the heating system further includes a heat supply network return water homothermal water mixer, the heat supply network return water homothermal water mixer is disposed in the circulation pipeline, the heat supply network return water homothermal water mixer is disposed on a downstream side of a backflow point on a most downstream side of the plurality of heat loads, the heat supply network return water homothermal water mixer is disposed on an upstream side of the heat pump device, and the heat supply network return water homothermal water mixer is configured to mix backflow working media of the plurality of heat loads to stabilize a temperature of the backflow working media.
Preferably, the plurality of heat loads are divided into a plurality of stage groups, and all of the return points in one of the adjacent two stage groups are located on an upstream side of all of the branch points in the other of the adjacent two stage groups.
In a second aspect, the present application provides a district heating network comprising a heating system as described above.
According to the heating system provided by the application, the working medium flowing back from one of the heat loads participates in the flow-dividing heat exchange of the other heat load, so that the temperature of the working medium in the circulating pipeline after passing through the heat loads can be reduced, the problem of high return water temperature of the primary network is fundamentally solved, the heat delivery capacity of the primary network is improved, the heating flow of the working medium provided by the heating device is increased or the heating difference is increased, the effect that one is the primary network and the other is the primary multi-stage heating mode can be realized, a new method for gradient multi-source heating in the heat exchange station is further realized, and space is provided for low-temperature heat energy to enter a pipe network.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Figure 1 shows a schematic view of a first example of a heating system provided according to an embodiment of the present application;
figure 2 shows a schematic view of a second example of a heating system provided according to an embodiment of the present application;
figure 3 shows a schematic view of a third example of a heating system according to an embodiment of the present application;
figure 4 shows a schematic view of a fourth example of a heating system according to an embodiment of the present application;
figure 5 shows a schematic view of a fifth example of a heating system according to an embodiment of the present application;
figure 6 shows a schematic view of a sixth example of a heating system according to an embodiment of the present application;
fig. 7 shows a schematic view of a seventh example of a heating system according to an embodiment of the present application.
Reference numerals:
1-a heating device; 2-hot water supply pipeline; 3-heat supply water return pipeline; 4-first hot user; 5-second hot user; 6-third hot user; 7-fourth hot user; 8-a heat pump device; 9-a drive source; 10-low temperature heat source water supply line; 11-low temperature heat source water return line; 12-heat network flow increment heaters; 13-heat supply network peak shaving heating power station; 14-heat exchange station for transporting backwater heat of heat supply network; 15-a heating station for heating the water returning waste heat of the heat supply network; 16-heat supply network backwater homothermal water mixer.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
According to a first aspect of the embodiments of the present application, a heating system is provided, where the heating system includes a heating device 1, a hot heating water pipeline 2, a hot heating water return pipeline 3, a first heat consumer 4, a second heat consumer 5, a third heat consumer 6, a fourth heat consumer 7, a heat pump device 8, a driving source 9, a low-temperature heat source water supply pipeline 10, a low-temperature heat source water return pipeline 11, a heat supply network flow increment heater 12, a heat supply network peak regulation heat station 13, a heat supply network return heat external transfer heat exchange station 14, a heat supply network return water waste heat heating station 15, and a heat supply network return water homothermal water mixer 16, and the structure and the operation principle of the heating system will be described in detail below with reference to fig. 1 to 6.
According to the heating system provided by the first aspect of the embodiment of the application, the circulating pipeline is communicated with the heating device 1, the working medium provided by the heating device 1 circulates in the circulating pipeline, each heat load in a plurality of heat loads is shunted from the circulating pipeline and flows back to the circulating pipeline, wherein the backflow point of one of the heat loads is positioned at the upstream side of the shunting point of the other heat load, so that the backflow working medium of one heat load participates in the shunting heat exchange of the other heat load, the temperature of the working medium in the circulating pipeline after passing through the plurality of heat loads can be reduced, the problem of high return water temperature of a primary network is fundamentally solved, a new method of gradient heating in a heat exchange station can be realized by increasing the heat supply flow of the working medium provided by the heating device 1 or increasing the heat supply difference, one heat load is a primary heating mode, the other heat load is a primary heating mode, providing space for low-temperature heat energy to enter a pipe network.
In an embodiment, the working fluid may be, for example, water, and the thermal load may be, for example, a thermal consumer, i.e., a consumer to be supplied with heat. As shown in fig. 1, fig. 1 shows a first example according to an embodiment of the present application, wherein the number of heat consumers may be 4 by way of example, and in an embodiment, each heat consumer may be branched off from a circulation line via a water inlet pipe and return water to the circulation line via a water return pipe, thereby implementing a heating process for each heat consumer. Note that the "upstream side" is defined in accordance with the flow direction of water.
Further, in an embodiment, the circulation line may include a hot supply water line 2, an intermediate line, and a hot supply water return line 3, which are connected in series, wherein the above-mentioned 4 hot users may all branch and return at the section where the intermediate line is located, that is, the hot water provided by the heating apparatus 1 (here, the heating apparatus 1 may be, for example, a boiler in an electric field) flows in the order from the heating apparatus 1 to the hot supply water line 2, to the intermediate line to supply heat to the hot users, to the hot supply water return line 3, and back to the heating apparatus 1.
In an embodiment, the plurality of thermal loads, i.e. the plurality of thermal consumers, are divided into a plurality of stage groups, all the return points in one of the two adjacent stage groups being located on the upstream side of all the split points in the other of the two adjacent stage groups, still referring to fig. 1, as an example, a first thermal consumer 4 and a second thermal consumer 5 are a first stage group, and a third thermal consumer 6 and a fourth thermal consumer 7 are a second stage group, wherein in fig. 1 the inlet pipe and the return pipe communicating with the thermal consumers are distinguished in the way of labeled arrows, i.e. the pipe with the arrow pointing towards the thermal consumer is the inlet pipe and the pipe with the arrow pointing towards the intermediate pipeline is the return pipe. In the embodiment, it is obvious that two return points of both the first and second heat users 4 and 5 as the first-stage group are located at the upstream side of two branch points of both the third and fourth heat users 6 and 7 as the second-stage group, so that the gradient heating can be further realized, and the regional heating mode can be realized for the heat users.
Further, although not shown in the figure, the number of hot users is not limited to 4, and may be 5, 6 or more, and the number of stage groups is not limited to two given above, and in fact, the number of stage groups may be further increased, and the number of hot users in a stage group may be plural or one.
On the basis of the first example shown in fig. 1 above, with further reference to fig. 2, fig. 2 shows a second example of a heating system provided according to an embodiment of the present application, wherein on the basis of the first example, a heat pump device 8 is added in the second example, in particular, the heat pump device 8 may be provided in a circulation line, the heat pump may include a low-temperature heat source and a drive source 9 (the low-temperature heat source exchanges heat via a low-temperature heat-source water supply line 10 and a low-temperature heat-source water return line 11), the heat pump device 8 is used to heat working medium, i.e., water, in the circulation line, and in an embodiment, the heat pump device 8 may be provided downstream of a most downstream-side return point among a plurality of heat loads, where, in conjunction with fig. 2, that is, the heat pump device 8 is provided downstream of a return point of a fourth heat consumer 7, in particular, in the example given in fig. 2, the heat pump device 8 is provided in the heating water return line 3, after the temperature of the heat supply backwater is reduced at the tail end of the circulating pipeline, the heat pump device 8 is additionally arranged in the heat supply system provided by the embodiment of the application, so that the heat supply backwater can be heated in a large-temperature-difference multistage manner, and the heat supply capacity of the heat supply system is improved.
With further reference to fig. 3 on the basis of the second example shown in fig. 2 above, fig. 3 shows a third example of a heating system provided according to an embodiment of the present application, wherein on the basis of the second example, a heat supply network flow incremental heater 12 is added in the third example, and in an embodiment, the heat supply network flow incremental heater 12 may be provided in the circulation line, and the heat supply network flow incremental heater 12 is provided on the upstream side of the branching point on the most upstream side among the plurality of thermal loads, that is, the heat supply network flow incremental heater 12 is provided on the upstream side of the branching point of the first thermal consumer 4 in fig. 3, where, in conjunction with fig. 3, the heat supply network flow incremental heater 12 is provided on the heat supply hot water line 2. In the embodiment, after the heating system improves the heating efficiency and the heating capacity by the above heat pump device 8, the increased flow rate of the heat grid (i.e., the entire heating system) can be reheated by the heat grid flow rate increment heater 12 by passing the increased flow rate through the heat grid flow rate increment heater 12, which can further increase the heating capacity of the heat grid.
On the basis of the third example shown in fig. 3 above, with further reference to fig. 4, fig. 4 shows a fourth example of the heating system provided according to the embodiment of the present application, wherein on the basis of the third example, in the fourth example, the heating system may further include a heat supply network return water homothermal mixer 16, the heat supply network return water homothermal mixer 16 may be disposed on a circulation line, and on the circulation line, the heat supply network return water homothermal mixer 16 may be disposed on a downstream side of a backflow point on a most downstream side of the plurality of heat loads, that is, the heat supply network return water homothermal mixer 16 may be disposed on the heat supply return water line 3, and the heat supply network return water homothermal mixer 16 may be disposed on an upstream side of the heat pump device 8, and the heat supply network return water homothermal mixer 16 is configured to mix the backflow working mediums of the plurality of heat loads to stabilize the temperature of the backflow working mediums.
In other words, the multi-stage cooled heat supply backwater (for heat consumers, namely, heating backwater) can be mixed by the heat supply network backwater homothermal backwater device due to different temperatures, so that the backwater enters a backwater system together after being neutralized and stabilized in temperature, wherein the backwater system refers to a general term of a device on a circulating pipeline, namely, on the heat supply backwater pipeline 3, on the downstream side of the heat supply network backwater homothermal water mixer 16, for further operation of the heat supply backwater, and in this example, the heat pump device 8 is obviously included in the backwater system.
With further reference to fig. 5 on the basis of the fourth example shown in fig. 4 above, fig. 5 shows a fifth example of the heating system provided according to the embodiment of the present application, wherein, on the basis of the fourth example, in the fifth example, the heating system may further include a heat grid peaking heating station 13, where the heat grid peaking heating station 13 may be disposed on a circulation line, on which the heat grid peaking heating station 13 may be disposed on an upstream side of a branching point on an uppermost upstream side among the plurality of heat loads, that is, the heat grid peaking heating station 13 may be disposed on the heating hot water line 2, and the heat grid peaking heating station 13 may be disposed on a downstream side of the heat grid flow increment heater 12, and therefore, the heat grid peaking heating station 13 also supplies heat to the heat user, when the heat pump apparatus 8, the heating apparatus 1, and the heat grid flow increment heater 12 cannot satisfy the peak load of the heat user, the peak heat load of a heat user can be compensated, the full-load operation of the heat pump device 8 in the whole heating season is realized, the energy is saved, and the economic benefit is increased.
On the basis of the fifth example shown in fig. 5 above, with further reference to fig. 6, fig. 6 shows a sixth example of the heating system provided according to the embodiment of the present application, wherein on the basis of the fifth example, in the sixth example, the heating system may further include a heat-supply-network-return-water-heat-export heat exchange station 14, the heat-supply-network-return-water-heat-export heat exchange station 14 may be disposed on a downstream side of a most downstream-side return point among the plurality of heat loads, the heat-supply-return-water-heat-export heat exchange station 14 may be configured to provide the working medium in the circulation line to the outside to be used as a heat source, and in the embodiment, as an example, the heat-supply-return-water-heat-export heat exchange station 14 may be disposed on an upstream side of the heat-supply-network-return-water homothermal water mixer 16.
Further, in the embodiment, the heat supply network backwater heat outward-conveying heat exchange station 14 may be configured to provide the working medium in the circulation pipeline to the outside to be used as a heat supply source or a low-temperature heat source of the heat pump, that is, the heating backwater after the multi-stage cooling of the user of the original heat supply system may still be used as a heat supply source of other energy-saving buildings or a low-temperature heat source of the electric heat pump system, and the heat can be fully utilized by cooling the heat supply network backwater heat outward-conveying heat exchange station 14 again.
On the basis of the sixth example shown in fig. 6 above, further referring to fig. 7, fig. 7 shows a seventh example of the heating system provided according to the embodiment of the present application, wherein, on the basis of the sixth example, in the seventh example, the heating system may further include a heat-supply-return-water waste-heat heating station 15, the heat-supply-return-water waste-heat heating station 15 may be disposed on the downstream side of the most downstream-side return point in the plurality of heat loads, that is, the heat-supply-return-water waste-heat heating station 15 may be disposed on the downstream side of the heat-supply-return homothermal mixer 16, in an embodiment, as an example, the heat-supply-return-water waste-heat heating station 15 may be disposed on the downstream side of the heat-supply-return-water homothermal mixer 16, the heat-supply-return-water waste-heat heating station 15 is configured to heat the working medium in the circulation line by using an external waste heat device, such as an in-station or out-station (here, in-station or out-station may refer to an electric field in which the heating device 1 is located), such as primary heating, thereby saving heating costs and increasing energy efficiency. Therefore, according to the seventh example provided by the embodiment of the present application, the heating system according to the embodiment of the present application substantially provides a heating system with one-grid multi-source multi-grid linkage multi-stage heat exchange and large temperature difference.
According to the heat supply system provided by the embodiment of the application, the problem of high return water temperature of the primary network is fundamentally solved, the utilization of the original unavailable waste resources and waste resources is realized, the heat supply area is increased, the pipeline investment is reduced, meanwhile, the flow of the primary network is reduced, the power consumption of the primary network is reduced, the primary energy consumption is reduced, the energy conservation and emission reduction are realized, the cooling consumption of the waste heat energy is reduced, the carbon emission is reduced, and the carbon emission and heat selling income is improved.
According to a second aspect of the embodiments of the present application, there is provided a district heating network, including the above heating system, and also including the above beneficial effects, which are not described herein again.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all changes that can be made in the details of the present application and the equivalents thereof, or directly or indirectly applied to other related technical fields, without departing from the spirit of the present application are intended to be embraced therein.
Claims (10)
1. A heating system, characterized in that the heating system comprises:
a heating device;
the circulating pipeline is communicated with the heating device, and the working medium provided by the heating device circulates in the circulating pipeline;
a plurality of heat loads, each of the heat loads being diverted from the recycle line and returned to the recycle line;
wherein a return point of one of the plurality of thermal loads is located on an upstream side of a branch point of another one of the plurality of thermal loads.
2. The heating system according to claim 1, further comprising a heat pump device provided in the circulation line, the heat pump including a low-temperature heat source and a drive source, the heat pump device being configured to heat the working medium in the circulation line, the heat pump device being provided on a downstream side of a return point on a most downstream side among the plurality of thermal loads.
3. The heating system according to claim 2, further comprising a heat supply network flow increment heater provided in the circulation line, the heat supply network flow increment heater being provided on an upstream side of a branching point on an uppermost-upstream side among the plurality of heat loads.
4. A heating system according to claim 3, further comprising a mains peaking heating station provided in the circulation line, the mains peaking heating station being provided upstream of the tap point on the most upstream side of the plurality of heat loads, and the mains peaking heating station being provided downstream of the mains flow incremental heater.
5. The heating system according to claim 2, further comprising a heat supply network return water heat outward-transfer heat exchange station provided on a downstream side of a return point on a most downstream side among the plurality of heat loads, the heat supply network return water heat outward-transfer heat exchange station provided on an upstream side of the heat pump device, the heat supply network return water heat outward-transfer heat exchange station being configured to supply the working medium in the circulation line to the outside to be used as a heat source.
6. The heating system according to claim 5, wherein the heat supply network backwater heat output heat exchange station is used for supplying the working medium in the circulating pipeline to the outside to be used as a heating heat source or a low-temperature heat source of a heat pump.
7. The heating system according to claim 2, further comprising a heat supply network return water waste heat heating station disposed on a downstream side of a return point on a most downstream side among the plurality of heat loads, and disposed on an upstream side of the heat pump device, the heat supply network return water waste heat heating station being configured to heat the working medium in the circulation line using an external waste heat device.
8. The heating system according to claim 2, further comprising a heating network return water homothermal mixer disposed in the circulation line, the heating network return water homothermal mixer being disposed downstream of a return point on a most downstream side of the plurality of thermal loads, and the heating network return water homothermal mixer being disposed upstream of the heat pump device, the heating network return water homothermal mixer being configured to mix returned working media of the plurality of thermal loads to stabilize a temperature of the returned working media.
9. A heating system according to any one of claims 1 to 8, wherein the plurality of heat loads are divided into a plurality of stage groups, and all return points in one of two adjacent stage groups are located on an upstream side of all branch points in the other of two adjacent stage groups.
10. A district heating network, characterized in that the district heating network comprises a heating system according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210706459.8A CN115076751A (en) | 2022-06-21 | 2022-06-21 | Heating system and regional heating network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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