CN215112839U - Low-temperature backwater heat supply system of primary heat supply network - Google Patents
Low-temperature backwater heat supply system of primary heat supply network Download PDFInfo
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- CN215112839U CN215112839U CN202121608593.1U CN202121608593U CN215112839U CN 215112839 U CN215112839 U CN 215112839U CN 202121608593 U CN202121608593 U CN 202121608593U CN 215112839 U CN215112839 U CN 215112839U
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Abstract
The utility model relates to a low-temperature backwater heating system of a primary heating network, which relates to a heating system and aims to solve the problems that the backwater temperature of the prior primary heating network is higher, which causes the reduction of the heat utilization rate of the primary heating network and the insufficient utilization of the heat supplied by the primary heating network, a primary heating network heater is communicated with a secondary heating network heater through a pipeline to form a circulation loop, the secondary heating network heater is communicated with a first heat user network through a pipeline to form a circulation loop, the primary heating network heater is communicated with a first inlet end of a heat pump through a pipeline, a first outlet end of the heat pump is communicated with a first inlet end of a heat exchanger, a first outlet end of the heat exchanger is communicated with a second inlet end of the heat pump, a second outlet end of the heat pump is communicated with the primary heating network heater, the second inlet end of the heat exchanger and a third inlet end of the heat pump are communicated with a second heat user, a third outlet end of the heat pump and a second outlet end of the heat exchanger are communicated with the second heat user, the utility model belongs to the heat supply field.
Description
Technical Field
The utility model relates to a heating system, concretely relates to low water temperature one-level heat supply network heating system. Belongs to the field of heat supply.
Background
The hot water supplied by the primary heat supply network is obtained by extracting steam in a steam turbine, heating the water by the heat supply network heater, sending the water to the secondary heat supply network heater through the primary heat supply network, heating the water in the secondary heat supply network, then sending the water to a user for heat supply, exchanging heat in the secondary heat supply network heater by the hot water of the primary heat supply network, returning to the primary heat supply network heater for heating, and circulating and reciprocating. The existing primary heat supply network adjusts the water supply temperature up and down at about 100 ℃ along with the change of outdoor temperature in winter, and returns water at about 60 ℃. Usually, the heat exchange of the second-stage heat supply network adopts a plate heat exchanger for heat exchange, and in order to ensure the water supply temperature of the second-stage heat supply network, the return water temperature of the first-stage heat supply network cannot be greatly reduced, so that the heat utilization rate of the first-stage heat supply network is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving current one-level heat supply network return water temperature and being higher, causing the heat utilization ratio decline of one-level heat supply network, the problem that the heat that the one-level heat supply network supplied can not make full use of, and then provide a one-level heat supply network low temperature return water heating system.
The technical problem is solved by the following scheme:
the system comprises a primary heat supply network heater, a secondary heat supply network heater and a first heat supply user network; the system also comprises a heat pump, a second heat user and a heat exchanger; the first-stage heat supply network heater and the second-stage heat supply network heater are communicated through a pipeline to form a circulation loop, the second-stage heat supply network heater and a first heat user network are communicated through a pipeline to form a circulation loop, the first-stage heat supply network heater is communicated with a first inlet end of a heat pump through a pipeline, a first outlet end of the heat pump is communicated with a first inlet end of a heat exchanger, a first outlet end of the heat exchanger is communicated with a second inlet end of the heat pump, a second outlet end of the heat pump is communicated with the first-stage heat supply network heater, a second inlet end of the heat exchanger and a third inlet end of the heat pump are communicated with a second heat user, and a third outlet end of the heat pump and a second outlet end of the heat exchanger are communicated with the second heat user.
Compared with the prior art, the utility model the beneficial effect who contains is:
1. the invention reduces the return water temperature of the primary heat supply network through the large-temperature-difference heat pump, improves the utilization rate of the water supply heat of the primary heat supply network, ensures the heat production capacity of a heat source plant, does not need to transform the primary heat supply network under the condition that the water supply quantity of the primary heat supply network is kept unchanged, and can greatly increase the heat supply area and increase the economic benefit of enterprises.
2. The temperature difference between the return water temperature of the primary heat supply network and the environment is reduced after the return water temperature is reduced, so that the heat loss of a pipeline is greatly reduced, the energy is saved, the consumption is reduced, and the economic benefit of a heat source plant is increased.
Drawings
Fig. 1 is a schematic view of the entire mechanism of the present application.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1, and the primary heat supply network low-temperature return water heating system comprises a primary heat supply network heater 13, a secondary heat supply network heater 14 and a first heat supply user network 16; the method is characterized in that: it also comprises a heat pump 2, a second heat consumer 3 and a heat exchanger 7; the first-stage heat supply network heater 13 and the second-stage heat supply network heater 14 are communicated through a pipeline to form a circulation loop, the second-stage heat supply network heater 14 and a first heat user network 16 are communicated through a pipeline to form a circulation loop, the first-stage heat supply network heater 13 is communicated with a first inlet end of the heat pump 2 through a pipeline, a first outlet end of the heat pump 2 is communicated with a first inlet end of the heat exchanger 7, a first outlet end of the heat exchanger 7 is communicated with a second inlet end of the heat pump 2, a second outlet end of the heat pump 2 is communicated with the first-stage heat supply network heater 13, a second inlet end of the heat exchanger 7 and a third inlet end of the heat pump 2 are both communicated with the second heat user 3, and a third outlet end of the heat pump 2 and a second outlet end of the heat exchanger 7 are both communicated with the second heat user 3.
The second embodiment is as follows: the embodiment is described with reference to fig. 1, and the heat pump 2 is a warm water type large temperature difference lithium bromide absorption heat pump of the primary heat supply network low-temperature return water heating system of the embodiment. Other components and connection modes are the same as those of the first embodiment.
The third concrete implementation mode: referring to fig. 1, the first-stage heat supply network low-temperature return water heating system according to the present embodiment further includes a first hot water pipe 1 and a first return water pipe 15, and the first-stage heat supply network heater 13 is communicated with the second-stage heat supply network heater 14 through the first hot water pipe 1 and the first return water pipe 15. Other components and connection modes are the same as those of the first embodiment.
The fourth concrete implementation mode: referring to fig. 1, the first-stage heat supply network low-temperature return water heating system according to the present embodiment further includes a second hot water pipe 9, a second return water pipe 6, a third hot water pipe 10, a third return water pipe 11, a fourth hot water pipe 5, and a fourth return water pipe 12; the first outlet end of the heat pump 2 is communicated with the first inlet end of the heat exchanger 7 through the second hot water pipe 9, the first outlet end of the heat exchanger 7 is communicated with the second inlet end of the heat pump 2 through the second water return pipe 6, the second inlet end of the heat exchanger 7 is communicated with the second heat consumer 3 through the third water return pipe 11, the second outlet end of the heat exchanger 7 is communicated with the second heat consumer 3 through the third hot water pipe 10, the third outlet end of the heat pump 2 is communicated with the third hot water pipe 10 through the fourth hot water pipe 5, and the third outlet end of the heat pump 2 is communicated with the third water return pipe 11 through the fourth water return pipe 12. Other components and connection modes are the same as those of the first embodiment.
The fifth concrete implementation mode: the embodiment is described with reference to fig. 1, and the primary heat supply network low-temperature return water heating system of the embodiment further includes a fifth hot water pipe 4 and a fifth return water pipe 8; the first inlet end of the heat pump 2 is communicated with the first hot water pipe 1 through a fifth hot water pipe 4, and the second outlet end of the heat pump 2 is communicated with the primary heat supply network heater 13 through a fifth water return pipe 8. Other compositions and connection modes are the same as those of the third or fourth embodiment.
Principle of operation
The two paths of water of the first-stage heat supply network heater 13 carry out heat exchange work, one path of the first-stage heat supply network heater 13 supplies heat to a first heat user network 16 through a first hot water pipe 1 and a first return water pipe 15, the other path of the first-stage heat supply network heater 13 enters a heat pump 2 through the first hot water pipe 1 to do work, the temperature is reduced by 20-30 ℃ and enters a heat exchanger 7 through a second hot water pipe 9 to heat and exchange the returned water of a second heat user 3, the temperature of the heat exchanger 7 is reduced by about 20 ℃ after heat exchange, the returned water enters the heat pump 2 through a second return water pipe 6 as a low-temperature heat source, the temperature is reduced to 25-30 ℃ after heat exchange of the heat pump 2 and returns to the first-stage heat supply network heater 13 through a fifth return water pipe 8, meanwhile, the returned water of the second heat user 3 is heated in two paths through a third return water pipe 11, one path of the third return water pipe 11 is heated through the heat exchanger 7, the heating thickness is about 60 ℃, the heat is supplied to a second heat user 3 after being converged by a third hot water pipe 10 and a fourth hot water pipe 5, the other path of the third water return pipe 11 enters a heat pump 2 through a fourth water return pipe 12 for heat exchange, the temperature is raised to about 60 ℃ after the heat exchange, and the heat is supplied to the second heat user 3 through the fourth hot water pipe 5 and the third hot water pipe 10.
Claims (5)
1. A primary heat supply network low-temperature backwater heat supply system comprises a primary heat supply network heater (13), a secondary heat supply network heater (14) and a first heat supply user network (16); the method is characterized in that: the system also comprises a heat pump (2), a second heat user (3) and a heat exchanger (7); the heat pump system comprises a primary heat supply network heater (13) and a secondary heat supply network heater (14) which are communicated through a pipeline to form a circulation loop, the secondary heat supply network heater (14) and a first heat user network (16) are communicated through a pipeline to form a circulation loop, the primary heat supply network heater (13) is communicated with a first inlet end of a heat pump (2) through a pipeline, a first outlet end of the heat pump (2) is communicated with a first inlet end of a heat exchanger (7), a first outlet end of the heat exchanger (7) is communicated with a second inlet end of the heat pump (2), a second outlet end of the heat pump (2) is communicated with the primary heat supply network heater (13), a second inlet end of the heat exchanger (7) and a third inlet end of the heat pump (2) are communicated with a second heat user (3), and a third outlet end of the heat pump (2) and a second outlet end of the heat exchanger (7) are communicated with the second heat user (3).
2. The primary heat supply network low-temperature return water heating system of claim 1, characterized in that: the heat pump (2) is a warm water type large temperature difference lithium bromide absorption heat pump.
3. The primary heat supply network low-temperature return water heating system of claim 1, characterized in that: the water heater further comprises a first hot water pipe (1) and a first water return pipe (15), and the primary heat supply network heater (13) is communicated with the secondary heat supply network heater (14) through the first hot water pipe (1) and the first water return pipe (15).
4. The primary heat supply network low-temperature return water heating system of claim 1, characterized in that: the water heater also comprises a second hot water pipe (9), a second water return pipe (6), a third hot water pipe (10), a third water return pipe (11), a fourth hot water pipe (5) and a fourth water return pipe (12); the first outlet end of the heat pump (2) is communicated with the first inlet end of the heat exchanger (7) through a second hot water pipe (9), the first outlet end of the heat exchanger (7) is communicated with the second inlet end of the heat pump (2) through a second water return pipe (6), the second inlet end of the heat exchanger (7) is communicated with a second heat consumer (3) through a third water return pipe (11), the second outlet end of the heat exchanger (7) is communicated with the second heat consumer (3) through a third hot water pipe (10), the third outlet end of the heat pump (2) is communicated with the third hot water pipe (10) through a fourth hot water pipe (5), and the third outlet end of the heat pump (2) is communicated with the third water return pipe (11) through a fourth water return pipe (12).
5. The primary heat supply network low-temperature return water heating system of claim 3 or 4, characterized in that: the water heater also comprises a fifth hot water pipe (4) and a fifth water return pipe (8); the first inlet end of the heat pump (2) is communicated with the first hot water pipe (1) through a fifth hot water pipe (4), and the second outlet end of the heat pump (2) is communicated with the first-stage heat supply network heater (13) through a fifth water return pipe (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121608593.1U CN215112839U (en) | 2021-07-15 | 2021-07-15 | Low-temperature backwater heat supply system of primary heat supply network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121608593.1U CN215112839U (en) | 2021-07-15 | 2021-07-15 | Low-temperature backwater heat supply system of primary heat supply network |
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| Publication Number | Publication Date |
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| CN215112839U true CN215112839U (en) | 2021-12-10 |
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| CN202121608593.1U Active CN215112839U (en) | 2021-07-15 | 2021-07-15 | Low-temperature backwater heat supply system of primary heat supply network |
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2021
- 2021-07-15 CN CN202121608593.1U patent/CN215112839U/en active Active
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