CN220506884U - Backwater large-temperature-difference heating system - Google Patents
Backwater large-temperature-difference heating system Download PDFInfo
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- CN220506884U CN220506884U CN202322127525.9U CN202322127525U CN220506884U CN 220506884 U CN220506884 U CN 220506884U CN 202322127525 U CN202322127525 U CN 202322127525U CN 220506884 U CN220506884 U CN 220506884U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 214
- 238000001816 cooling Methods 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 2
- 238000010992 reflux Methods 0.000 claims 1
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
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Abstract
The utility model discloses a backwater large-temperature-difference heating system which comprises a heat source factory and a first heat pump, wherein the heat source factory is sequentially connected with a first heat exchanger and a second heat exchanger, one end, far away from the first heat exchanger, of the second heat exchanger is connected with a first heat user, a first water supply pipeline and a first water return pipeline are arranged between the first heat exchanger and the second heat exchanger, the first water return pipeline is connected with a second heat user and a third heat user, both the second heat user and the third heat user are connected with the first heat pump, water on the first water return pipeline is heated and flows back to the first water supply pipeline through the first heat pump after passing through the second heat user, and water on the first water return pipeline is cooled and flows back to one end, close to the first heat exchanger, of the first water return pipeline through the first heat pump after passing through the third heat user. The backwater large-temperature-difference heating system provided by the utility model saves cost, and reduces the temperature of water passing through a third heat user through the first heat pump, thereby improving the heating capacity of a heating network pipe.
Description
Technical Field
The utility model belongs to the technical field of central heating, and particularly relates to a backwater large-temperature-difference heating system.
Background
In recent years, with the rapid development of urban areas, the urban scale is gradually enlarged, the centralized heating area and the heat load are also greatly increased, and the centralized heating network also faces the problem of insufficient heat supply capacity. The heating in winter in northern China is mainly based on a central heating mode, and the heating capacity of the heat supply network is determined by the temperature difference of the water supply and return of the central heating primary network. The town central heating network generally at least comprises two-stage pipe networks, and the primary network hot water transfers heat to the secondary network through the heat exchange station plate, and then supplies heat to users. The primary pipe network is connected with a heat source plant, which is generally a thermal power plant or a small boiler room.
As the indoor temperature needs to meet the condition that the temperature is higher than 18 ℃, the return water temperature of the primary pipe network is higher, and the heat supply capacity of the heat supply pipe network can be limited due to the high return water temperature. And with the rapid improvement of urban level, the urban central heating demand is rapidly increased, and a newly-built pipe network is required to meet the heating demand, but the investment of the newly-built pipe network is larger, and the cost is higher.
Therefore, there is a need to design a water return large-temperature-difference heat supply system, which solves the problems that the water return temperature of the primary pipe network is high, the heat supply capacity of the heat supply pipe network is limited due to the high water return temperature, and the cost is high due to the newly-built pipe network in order to meet the heat supply requirement.
Disclosure of Invention
In order to solve the technical problems that the return water temperature of the primary pipe network is higher in the background art, the heat supply capacity of a heat supply pipe network can be limited due to the high return water temperature, and in order to meet the heat supply requirement, the cost is higher due to the new pipe network, and the return water large-temperature-difference heat supply system is provided to solve the problems.
In order to achieve the purpose, the specific technical scheme of the backwater large-temperature-difference heating system is as follows:
the utility model provides a large temperature difference heating system returns water, including heat source factory and first heat pump, heat source factory connects gradually first heat exchanger and second heat exchanger, the first heat user is connected to the one end that first heat exchanger was kept away from to the second heat exchanger, be provided with first supply line and first return line between first heat exchanger and the second heat exchanger, be connected with second heat user and third heat user on the first return line, second heat user and third heat user all are connected with first heat pump, after the second heat user was passed through to the water on the first return line, return water to first supply line through first heat pump intensification, after the third heat user was passed through to the water on the first return line, return water to the one end that first return line is close to first heat exchanger through first heat pump cooling.
Further, the first heat pump includes a first condenser and a first evaporator, the first condenser is connected with the second heat user to heat water flowing through the second heat user, and the first evaporator is connected with the third heat user to cool backwater flowing through the third heat user.
Further, the first heat pump further comprises a first compressor and a first throttling device, and the first compressor, the first condenser, the first throttling device and the first evaporator are sequentially connected.
Further, the heat pump system further comprises a second heat pump, the second heat pump is arranged at one end, close to the second heat exchanger, of the first water return pipeline, and the second heat pump is used for cooling water, close to one end of the second heat exchanger, of the first water return pipeline and then returning the cooled water to one end, close to the first heat exchanger, of the first water return pipeline.
Further, a second water supply pipeline and a second water return pipeline are arranged between the second heat exchanger and the first heat user, the second heat pump is further connected between the second water supply pipeline and the second water return pipeline, and the second heat pump heats water passing through the second water return pipeline after the first heat user and then flows back to the second water supply pipeline.
Further, the second heat pump comprises a second condenser and a second evaporator, the second condenser is connected with the first heat user to heat water passing through a second water return pipeline after the first heat user, and the first evaporator is connected with the first water return pipeline to enable the water of the first water return pipeline to flow back to one end, close to the first heat exchanger, of the first water return pipeline in a cooling mode.
Further, the second heat pump further comprises a second compressor and a second throttling device, and the second compressor, the second condenser, the second throttling device and the second evaporator are sequentially connected.
Further, the water pump comprises a first water pump, wherein the first water pump is arranged on the first water supply pipeline and is used for adjusting the flow rate of water on the first water supply pipeline.
Further, the water pump comprises a second water pump which is arranged on the second water supply pipeline and used for adjusting the flow rate of the water entering the first heat user from the second water supply pipeline.
Further, still include third water pump and fourth water pump, the third water pump sets up between first return line and second heat user, and the fourth water pump sets up between first return line and third heat user.
The backwater large-temperature-difference heating system has the following advantages:
through setting up second heat user and third heat user on first wet return line, second heat user and third heat user all are connected with first heat pump, the water on first wet return line can be satisfied the heating demand to other heat users, need not newly-built pipe network and satisfy the heating demand, can directly utilize the water on the first wet return line to heat required user, the cost is saved, and through first heat pump to the water through the second heat user intensifies, the water after the intensification can continue to flow back to first water supply line and use, and first heat pump is cooled down the return water through the third heat user, the water after the cooling flows back to the one end that first wet return line is close to first heat exchanger, first wet return line return water temperature has been reduced, the heating capacity of heat supply network management has been improved.
Drawings
FIG. 1 is a schematic diagram of a large temperature difference heating system for backwater.
The figure indicates:
1. a heat source plant; 2. a first heat exchanger; 3. a second heat exchanger; 4. a first hot user; 5. a first water supply line; 6. a first water return line; 7. a second hot user; 8. a third hot user; 9. a second water supply line; 10. a second water return line; 11. a first water pump; 12. a second water pump; 13. a third water pump; 14. a fourth water pump; 15. a fifth water pump; 101. a first heat pump; 1011. a first compressor; 1012. a first condenser; 1013. a first throttle device; 1014. a first evaporator; 102. a second heat pump; 1021. a second compressor; 1022. a second condenser; 1023. a second throttle device; 1024. and a second evaporator.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
Those skilled in the art will appreciate that while some embodiments herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
The backwater large-temperature-difference heating system of the present utility model will be described with reference to fig. 1.
As the indoor temperature needs to meet the condition that the temperature is higher than 18 ℃, the return water temperature of the primary pipe network is higher, and the heat supply capacity of the heat supply pipe network can be limited due to the high return water temperature. And with the rapid improvement of urban level, the urban central heating demand is rapidly increased, and a newly-built pipe network is required to meet the heating demand, but the investment of the newly-built pipe network is larger, and the cost is higher. Therefore, there is a need to design a backwater large-temperature-difference heating system to solve the above-mentioned problems.
As shown in fig. 1, the backwater large-temperature-difference heating system comprises a heat source plant 1 and a first heat pump 101, wherein the heat source plant 1 is sequentially connected with a first heat exchanger 2 and a second heat exchanger 3, one end, far away from the first heat exchanger 2, of the second heat exchanger 3 is connected with a first heat supply pipeline 5 and a first water return pipeline 6, a second heat user 7 and a third heat user 8 are connected to the first water return pipeline 6, the second heat user 7 and the third heat user 8 are connected with the first heat pump 101, water on the first water return pipeline 6 is heated and flows back to the first water supply pipeline 5 through the first heat pump 101 after passing through the second heat user 7, and water on the first water return pipeline 6 is cooled and flows back to one end, close to the first heat exchanger 2, of the first water return pipeline 6 through the first heat pump 101 after passing through the third heat user 8.
Through set up second heat user 7 and third heat user 8 on first return pipe 6, second heat user 7 and third heat user 8 all are connected with first heat pump 101, the water on the first return pipe 6 can be satisfied the heating demand to other heat users, need not newly-built pipe network to satisfy the heating demand, can directly utilize the water on the first return pipe 6 to heat required user, the cost is saved, and heat up the water through second heat pump 7 through first heat pump 101, the water after the intensification can continue to flow back to first supply pipe 5 and use, and first heat pump 101 is to the return water through third heat user 8 cooling, the water after the cooling flows back to the one end that first return pipe 6 is close to first heat exchanger 2, return water temperature on the first return pipe 6 has been reduced, the heat supply capacity of network management has been improved.
Further, as shown in fig. 1, the first heat pump 101 includes a first condenser 1012 and a first evaporator 1014, the first condenser 1012 is connected to the second heat user 7 to heat the water flowing through the second heat user 7, the water on the first water return pipe 6 flows into the second heat user 7 to supply heat to the second heat user 7, after the heat supply is completed, the water flow is heated to a temperature corresponding to the water in the first water supply pipe 5 through the first condenser 1012, and the water flow flows back into the first water supply pipe 5, so that the heat supply capacity of the first water supply pipe 5 is improved. The first evaporator 1014 is connected with the third heat user 8 to cool down the water flowing through the third heat user 8, the water on the first water return pipeline 6 flows into the third heat user 8 to supply heat to the third heat user 8, after the heat supply is finished, the water flows back to one end of the first water return pipeline 6, which is close to the first heat exchanger 2, after the water flow is cooled to the required temperature by the first evaporator 1014, the water return temperature of the water flowing back to one end of the first water return pipeline 6, which is close to the first heat exchanger 2, is reduced by the first evaporator 1014, and the heat supply capacity of the heat supply system is improved. And under the condition that a pipe network is not additionally arranged, the water of the first water return pipeline 6 is utilized to supply heat to the second heat user 7 and the third heat user 8, so that the demand of increasing the heat supply is met, and the cost is reduced. In this embodiment, the first heat pump 101 further includes a first compressor 1011 and a first throttle device 1013, and the first compressor 1011, the first condenser 1012, the first throttle device 1013, and the first evaporator 1014 are connected in this order in a loop arrangement.
Further, as shown in fig. 1, the backwater large-temperature-difference heating system further comprises a second heat pump 102, wherein the second heat pump 102 is arranged at one end of the first backwater pipeline 6, which is close to the second heat exchanger 3, and the structure of the second heat pump 102 is the same as that of the first heat pump 101. A second water supply line 9 and a second water return line 10 are arranged between the second heat exchanger 3 and the first heat consumer 4. On the one hand, the second heat pump 102 is used for cooling water on the first water return pipeline 6 and then returning the water to one end, close to the first heat exchanger 2, of the first water return pipeline 6, on the other hand, the second heat pump 102 is further connected between the second water supply pipeline 9 and the second water return pipeline 10, the second heat pump 102 is used for heating water passing through the second water return pipeline 10 after the first heat user 4 and then returning the water to the second water supply pipeline 9, and the water returned to the second water supply pipeline 9 and the water in the second water supply pipeline 9 supply heat for the first heat user 4 together.
Specifically, as shown in fig. 1, the second heat pump 102 includes a second compressor 1021, a second condenser 1022, a second throttling device 1023, and a second evaporator 1024, and the second compressor 1021, the second condenser 1022, the second throttling device 1023, and the second evaporator 1024 are sequentially connected in a loop arrangement. The second condenser 1022 is connected to the first heat consumer 4 to raise the temperature of the water passing through the second water return pipeline 10 of the first heat consumer 4 to the temperature required by the second water supply pipeline 9, and the first evaporator 1014 is connected to the first water return pipeline 6 to lower the temperature of the water at one end of the first water return pipeline 6 near the second heat exchanger 3 and return the water at one end of the first water return pipeline 6 near the first heat exchanger 2, so as to reduce the return water temperature of the first water return pipeline 6 and improve the heating capacity of the heating system.
Further, as shown in fig. 1, the backwater large-temperature-difference heating system further comprises a first water pump 11, a second water pump 12, a third water pump 13, a fourth water pump 14 and a fifth water pump 15, wherein the first water pump 11 is arranged on the first water supply pipeline 5 and is used for adjusting the water flow rate on the first water supply pipeline 5. The second water pump 12 is disposed on the second water supply pipeline 9, and is used for adjusting the flow rate of water entering the first heat consumer 4 from the second water supply pipeline 9, specifically, the second water supply pipeline 9 and the water flowing to the second water supply pipeline 9 after being heated by the second condenser 1022 are heated, and after the flow rate of water is adjusted by the second water pump 12, heat is supplied to the first heat consumer 4. The third water pump 13 is arranged between the first water return pipeline 6 and the second heat user 7, the third water pump 13 is used for adjusting the water quantity of the first water return pipeline 6 entering the second heat user 7, the fourth water pump 14 is arranged between the first water return pipeline 6 and the third heat user 8, and the fourth water pump 14 is used for adjusting the water quantity of the first water return pipeline 6 entering the third heat user 8. One end of a fifth water pump 15 is connected with one end of the first water return pipeline 6, which is close to the second heat exchanger 3, the other end of the fifth water pump 15 is connected with one end of the first water return pipeline 6, which is close to the first heat exchanger 2, after being cooled by the second evaporator 1024, and the fifth water pump 15 is used for adjusting the water quantity flowing back to the first water return pipeline 6.
Through set up second heat user 7 and third heat user 8 on first return pipe 6, second heat user 7 and third heat user 8 all are connected with first heat pump 101, the water on the first return pipe 6 can satisfy the heating demand to other heat users, under the prerequisite that does not increase a net pipe network investment, supply heat for second heat user 7 and third heat user 8 through the water on the first return pipe 6, the heating capacity of pipe network has been increased, investment cost has been saved, and return water temperature of third heat user 8 has been reduced through first heat pump 101, further the heating capacity of pipe network has been increased.
It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (10)
1. The utility model provides a return water big difference in temperature heating system, a serial communication port, including heat source factory and first heat pump, heat source factory connects gradually first heat exchanger and second heat exchanger, the one end that first heat exchanger was kept away from to the second heat exchanger is connected first heat user, be provided with first supply line and first return water pipeline between first heat exchanger and the second heat exchanger, be connected with second heat user and third heat user on the first return water pipeline, second heat user and third heat user all are connected with first heat pump, after the second heat user was passed through to the water on the first return water pipeline, return water on the first return water pipeline was after the third heat user through the first heat pump cooling backward flow to the one end that first return water pipeline is close to first heat exchanger.
2. The large temperature difference heating system of claim 1, wherein the first heat pump comprises a first condenser and a first evaporator, the first condenser being connected to the second heat consumer to warm water flowing through the second heat consumer, the first evaporator being connected to the third heat consumer to cool water flowing through the third heat consumer.
3. The backwater large temperature difference heating system according to claim 2, wherein the first heat pump further comprises a first compressor and a first throttling device, and the first compressor, the first condenser, the first throttling device and the first evaporator are sequentially connected.
4. The backwater large temperature difference heating system according to claim 1, further comprising a second heat pump, wherein the second heat pump is arranged at one end of the first backwater pipeline close to the second heat exchanger, and the second heat pump is used for cooling water at one end of the first backwater pipeline close to the second heat exchanger and then refluxing the cooled water to one end of the first backwater pipeline close to the first heat exchanger.
5. The large temperature difference heating system of claim 4, wherein a second water supply pipeline and a second water return pipeline are arranged between the second heat exchanger and the first heat user, the second heat pump is further connected between the second water supply pipeline and the second water return pipeline, and the second heat pump heats water passing through the second water return pipeline after the first heat user and returns the heated water to the second water supply pipeline.
6. The large temperature difference heating system of claim 5, wherein the second heat pump comprises a second condenser and a second evaporator, the second condenser is connected to the first heat consumer to heat water passing through the second water return line after the first heat consumer, and the first evaporator is connected to the first water return line to return water of the first water return line to the end of the first water return line near the first heat exchanger.
7. The large temperature difference backwater heating system of claim 6, wherein the second heat pump further comprises a second compressor and a second throttling device, the second compressor, the second condenser, the second throttling device and the second evaporator being connected in sequence.
8. The large temperature difference backwater heating system as claimed in claim 1, further comprising a first water pump disposed on the first water supply pipe for regulating the flow rate of water on the first water supply pipe.
9. The large temperature difference heating system of claim 5, further comprising a second water pump disposed on the second water supply line for regulating the flow of water from the second water supply line into the first heat consumer.
10. The large temperature difference back water heating system according to claim 1, further comprising a third water pump and a fourth water pump, the third water pump being disposed between the first water return line and the second heat consumer, the fourth water pump being disposed between the first water return line and the third heat consumer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322127525.9U CN220506884U (en) | 2023-08-09 | 2023-08-09 | Backwater large-temperature-difference heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322127525.9U CN220506884U (en) | 2023-08-09 | 2023-08-09 | Backwater large-temperature-difference heating system |
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| Publication Number | Publication Date |
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| CN220506884U true CN220506884U (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322127525.9U Active CN220506884U (en) | 2023-08-09 | 2023-08-09 | Backwater large-temperature-difference heating system |
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| CN (1) | CN220506884U (en) |
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2023
- 2023-08-09 CN CN202322127525.9U patent/CN220506884U/en active Active
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