CN210624678U - Heat storage type geothermal efficient centralized heating system - Google Patents
Heat storage type geothermal efficient centralized heating system Download PDFInfo
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- CN210624678U CN210624678U CN201920928001.0U CN201920928001U CN210624678U CN 210624678 U CN210624678 U CN 210624678U CN 201920928001 U CN201920928001 U CN 201920928001U CN 210624678 U CN210624678 U CN 210624678U
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Abstract
The technology belongs to the geothermal heating technology, and particularly relates to a heat storage type geothermal efficient centralized heating system which comprises a heat collection circulating system, a heat supply circulating system and a water supplementing system, wherein the heat collection circulating system comprises a water collection well, a water collection pump, a water collector, a rotational flow desander, a primary plate type heat exchanger, a secondary plate type heat exchanger, a filtering device, a recharging pressure pump, a water separator and a recharging well; the heat supply circulating system comprises a heat storage device, a heat pump unit, a heat consumer, a heat release water pump, a heating circulating pump, a heat pump intermediate water circulating pump, a first heat pump bypass valve and a second heat pump bypass valve; the heat supply circulating system comprises a heat storage device, a heat pump unit, a heat consumer, a heat release water pump, a heating circulating pump and a heat pump intermediate water circulating pump; the technical scheme combines the heat storage technology and the geothermal energy heat supply system according to a certain proportion, and realizes peak clipping and valley filling of heat source heat supply load by intermittent storage in the low valley heat supply load period and stable output in the peak heat supply load period.
Description
Technical Field
The technology belongs to the geothermal heating technology, and particularly relates to a heat storage type geothermal efficient centralized heating system.
Background
With the further development of the economic globalization, the worldwide demand for resources is increasing day by day, the demand of the oil, coal and other energy sources which dominate the energy consumption is also increasing gradually, the reserves of the oil, coal and other resources which are proved to be limited at present are very limited, and the contradiction between supply and demand is becoming more and more intense. Meanwhile, the problem of environmental pollution caused by traditional fossil energy is increasingly serious, and energy conservation and emission reduction gradually become one of the important problems of various countries. The recognition and action of various countries in the world on the major problems of greenhouse gas emission reduction and the like are gradually consistent, and new energy is needed to relieve the pollution problem in the world.
Geothermal resources are renewable clean energy, have the characteristics of cleanness, environmental protection, wide application, good stability, cyclic utilization and the like, are not interfered by external factors such as seasons, climates, day and night changes and the like, and are realistic and competitive new energy. With the increasing scarcity of fossil energy and the aggravation of environmental pollution, the great potential of geothermal energy for future energy supply and energy conservation and emission reduction is highly recognized and valued by countries in the world.
The quantity of hydrothermal geothermal resources in China is relatively rich, which is equivalent to 12500 million tons of standard coal, and the annual exploitable quantity is equivalent to 18.65 million tons of standard coal, but the exploitation rate is only 0.2% at present, and the development and utilization potential of geothermal resources is huge. Direct water collection and heat extraction are the most common development mode of hydrothermal type medium-deep geothermal resources, but geothermal wells have high cost and usually account for more than half of the total investment; meanwhile, in urban built-up areas where heating loads are concentrated, the geothermal well pattern locations and drilling sites are often limited.
With the continuous development of heat storage materials and heat storage technology, the collection and utilization of clean energy with space-time distribution and supply and demand change characteristics through heat storage already has a technical foundation, but such a high-efficiency energy-saving geothermal energy central heating mode has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a high-efficient central heating system of heat storage type geothermol power.
The technical scheme of the utility model is that:
a heat storage type geothermal efficient centralized heating system comprises a heat collecting circulation system, a heat supply circulation system and a water supplementing system, and is characterized in that the heat collecting circulation system comprises a water collecting well, a water collecting pump, a water collector, a rotational flow desander, a primary plate heat exchanger, a secondary plate heat exchanger, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve, a filtering device, a recharging pressure pump, a water separator and a recharging well, wherein the water collecting pump is placed in the water collecting well and is connected with a water inlet of a water collecting pipeline, a water outlet of the water collecting pipeline is connected with a water inlet of the rotational flow desander through a pipeline, a water outlet of the rotational flow desander is connected with a geothermal water supply pipeline, a branch of the geothermal water supply pipeline is connected with a primary side inlet of the primary plate heat exchanger, a primary side outlet of the first-stage plate type heat exchanger is connected with a primary side inlet of the second-stage plate type heat exchanger through a branch of a first geothermal water bypass pipeline, the other branch of the first geothermal water bypass pipeline is connected with a second geothermal water bypass pipeline connected with a primary side outlet of the second-stage plate type heat exchanger in parallel to a filter device, the filter device is connected with a water distributor through a geothermal water return pipeline, the water distributor is connected to a recharging well, a first valve and a second valve are arranged on one branch of the geothermal water supply pipeline, a third valve, a fourth valve and a fifth valve are arranged on the first geothermal water bypass pipeline, a sixth valve is arranged on the second geothermal water bypass pipeline, and a seventh valve and an eighth valve are arranged on the geothermal water return pipeline;
the heat supply circulating system comprises a heat storage device, a heat pump unit, a heat consumer, a heat release water pump, a heating circulating pump, a heat pump intermediate water circulating pump, a first heat storage valve, a second heat storage valve, a first heat release valve, a second heat release valve, a first heat pump bypass valve, a second heat pump bypass valve, a ninth valve, a tenth valve, an eleventh valve, a twelfth valve, a thirteenth valve and a fourteenth valve; the other branch of the geothermal water supply pipeline is connected with a primary side inlet of the heat storage device, a primary side outlet of the heat storage device is connected to a first geothermal water bypass pipeline through a third geothermal water bypass pipeline, a secondary side outlet of the heat storage device is connected to a main heating pipeline through a heat release pipeline, a secondary side inlet of the heat storage device is connected with a water outlet of a heat release side water supply return pipeline, a water inlet of the heat release water supply return pipeline is connected with a main heating water return pipeline, a secondary side outlet of the primary plate type heat exchanger is connected with a heat user through a main heating pipeline, a secondary side inlet of the primary plate type heat exchanger is connected with the heat user through a main heating water return pipeline, a secondary outlet of the secondary plate type heat exchanger is connected with one end of a secondary heating pipeline, the other end of the secondary heating pipeline is connected to the main heating pipeline, and a secondary side inlet of the secondary, the other end of the auxiliary heating water return pipeline is connected to the main heating water return pipeline, the auxiliary heating pipeline and the auxiliary heating water return pipeline are connected with a heat pump component in parallel, a first heat storage valve is arranged on the other branch of the geothermal water supply pipeline, a second heat storage valve is arranged on the third geothermal water by-pass pipeline, the heat release pipeline is provided with a first heat release valve, the heat release side water supply and return pipeline is provided with a second heat release valve and a heat release water pump, a ninth valve is arranged on the main heating pipeline, a tenth valve and an eleventh valve are arranged on the auxiliary heating pipeline, the main heating water return pipeline is provided with a heating circulating pump and a twelfth valve, the heat pump unit is respectively connected with the first heat pump bypass valve and the second heat pump bypass valve in parallel, a thirteenth valve, a fourteenth valve and a heat pump intermediate water circulating pump are arranged on the auxiliary heating water return pipeline;
the water supplementing system comprises a softened water device, a softened water tank, a water supplementing constant-pressure pump and a fifteenth valve, municipal tap water is connected with the softened water device through a tap water pipeline, the softened water device is connected with the softened water tank, the softened water tank is connected to a main heating water return pipeline through a water supplementing pipeline, and the water supplementing pipeline is provided with the fifteenth valve and the water supplementing constant-pressure pump.
Preferably, the water production pump is a hot water submersible pump for a geothermal well.
Preferably, an electromagnetic flow meter is arranged on the geothermal water supply pipeline.
Preferably, a gas-water separation device and a pipeline booster pump are arranged between the cyclone desander and the first-stage plate heat exchanger and between the cyclone desander and the heat storage device.
Preferably, the heat pump unit is a compression heat pump unit, the compression heat pump unit comprises a condenser, an evaporator, a throttle valve, a compressor, a first stop valve, a second stop valve, a third stop valve, a fourth stop valve, a first three-way valve, a second three-way valve, a third three-way valve and a fourth three-way valve, the auxiliary heating pipeline is sequentially connected in series with the first stop valve, the first three-way valve, the second stop valve and the second three-way valve, two ends of the first heat pump bypass valve are respectively connected with the other ends of the first three-way valve and the second three-way valve, the auxiliary heating water return pipeline is sequentially connected in series with the third stop valve, the third three-way valve, the fourth stop valve and the fourth three-way valve, two ends of the second heat pump bypass valve are respectively connected with the other ends of the third three-way valve and the fourth three-way valve, the condenser, the compressor, the evaporator and the throttle, the evaporator is located between the third stop valve and the fourth stop valve.
Preferably, the heat pump unit adopts a gas absorption heat pump unit.
Preferably, a branch of the geothermal water supply pipeline, the main heating water return pipeline, the first geothermal water bypass pipeline and the second geothermal water bypass pipeline are all provided with a water drain valve.
Preferably, the main heating pipeline, the main heating water return pipeline and the water replenishing pipeline are all provided with check valves.
Preferably, the first-stage plate heat exchanger and the second-stage plate heat exchanger both adopt titanium plate heat exchangers.
The utility model has the advantages that: compared with the prior art, the technical scheme combines the heat storage technology and the geothermal energy heat supply system according to a certain proportion, and realizes peak clipping and valley filling of the heat source heat supply load by intermittent storage at the time of low-valley heat supply load and stable output at the time of high-peak heat supply load, so that the well distribution quantity demand and well drilling investment can be reduced, the starting and stopping times of a submersible pump of the geothermal well can be reduced, the running time of the submersible pump at a high pump efficiency section can be increased, and efficient and stable heat supply can be realized; the utility model discloses a one-level plate heat exchanger and second grade plate heat exchanger and heat pump set utilize geothermal water heat to the heat supply of heat consumer, and make full use of geothermal resources adopts the technique of recharging simultaneously, does not influence the following water resource, has good social and economic benefits.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a heat pump unit in an embodiment of the present invention.
Wherein, 1, a water extraction well; 2. a hot water submersible pump; 3. a water collector; 4. a cyclone desander; 5. a primary plate heat exchanger; 6. a secondary plate heat exchanger; 7. a filtration device; 8. recharging the pressure pump; 9. a water separator; 10. recharging the well; 11. a heat storage device; 12. a hot user; 13. a heat pump unit; 14. softening the water tank; 15. a water softening device; 16. a geothermal water supply pipeline; 17. a first geothermal water bypass line; 18. a second geothermal water bypass line; 19. a third geothermal water bypass line; 20. a heat release pipe; 21. the heat release side supplies water to the water return pipeline; 22. a main heating conduit; 23. a main heating water return pipeline; 24. a secondary heating conduit; 25. an auxiliary heating water return pipeline; 26. a water replenishing pipeline; 27. a heat release water pump; 28. a heating circulating pump; 29. a heat pump intermediate water circulating pump; 30. a water replenishing constant pressure pump; 31. a first heat storage valve; 32. a second heat storage valve; 33. a first heat release valve; 34. a second heat release valve; 35. a first heat pump bypass valve; 36. a second heat pump bypass valve; 37. a first valve; 38. a second valve; 39. a third valve; 40. a fourth valve; 41. a fifth valve; 42. a sixth valve; 43. a seventh valve; 44. an eighth valve; 45. a ninth valve; 46. a tenth valve; 47. an eleventh valve; 48. a twelfth valve; 49. a thirteenth valve; 50. a fourteenth valve; 51. a fifteenth valve;
1301. a condenser; 1302. an evaporator; 1303. a throttle valve; 1304. a compressor; 1305. a first shut-off valve; 1306. a second stop valve; 1307. a third stop valve; 1308. a fourth stop valve; 1309. a first three-way valve; 1310. a second three-way valve; 1311. a third three-way valve; 1312. and a fourth three-way valve.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention are clearly and completely described below with reference to the accompanying drawings and embodiments, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-2, a heat storage type geothermal efficient centralized heating system comprises a heat collection circulation system, a heat supply circulation system and a water supplement system, and is characterized in that the heat collection circulation system comprises a water collection well 1, a hot water submersible pump 2, a water collector 3, a cyclone sand remover 4, a primary plate heat exchanger 5, a secondary plate heat exchanger 6, a first valve 37, a second valve 38, a third valve 39, a fourth valve 40, a fifth valve 41, a sixth valve 42, a seventh valve 43, an eighth valve 44, a filtering device 7, a recharge booster pump 8, a water separator 9 and a recharge well 10, the hot water submersible pump 2 is placed in the water collection well 1 and connected with a water inlet of a water collection pipeline, a water outlet of the water collection pipeline is connected to a water inlet of the water collector 3, a water outlet of the water collector 3 is connected with a water inlet of the cyclone sand remover 4 through a pipeline, the water outlet of the rotational flow sand remover 4 is connected with a geothermal water supply pipeline 16, one branch of the geothermal water supply pipeline 16 is connected with a primary side inlet of a primary plate type heat exchanger 5, a primary side outlet of the primary plate type heat exchanger 5 is connected with a primary side inlet of a secondary plate type heat exchanger 6 through one branch of a first geothermal water bypass pipeline 17, the other branch of the first geothermal water bypass pipeline 16 and a second geothermal water bypass pipeline 18 connected with a primary side outlet of the secondary plate type heat exchanger 6 are connected in parallel to a filter device, the filter device 7 is connected with a water distributor 9 through a geothermal water return pipeline, the water distributor 9 is connected to a recharge well 10, a first valve 37 and a second valve 38 are arranged on one branch of the geothermal water supply pipeline 16, a third valve 39, a fourth valve 40 and a fifth valve 41 are arranged on the first geothermal water bypass pipeline 17, a sixth valve 42 is arranged on the second geothermal water bypass pipeline 18, and a seventh valve 43 and an eighth valve 44 are arranged on the geothermal water return pipeline;
the heat supply circulating system comprises a heat storage device 11, a heat pump unit 13, a heat consumer 14, a heat release water pump 27, a heating circulating pump 28, a heat pump intermediate water circulating pump 39, a first heat storage valve 31, a second heat storage valve 32, a first heat release valve 33, a second heat release valve 34, a first heat pump bypass valve 35, a second heat pump bypass valve 36, a ninth valve 45, a tenth valve 46, an eleventh valve 47, a twelfth valve 48, a thirteenth valve 49 and a fourteenth valve 50; the other branch of the geothermal water supply pipeline 16 is connected with a primary side inlet of the heat storage device 11, a primary side outlet of the heat storage device 11 is connected to a first geothermal water bypass pipeline 17 through a third geothermal water bypass pipeline 19, a secondary side outlet of the heat storage device 11 is connected to a main heating pipeline 22 through a heat release pipeline 20, a secondary side inlet of the heat storage device 11 is connected with a water outlet of a heat release side water supply and return pipeline 21, a water inlet of the heat release side water supply and return pipeline 21 is connected with a main heating water return pipeline 23, a secondary side outlet of the primary plate type heat exchanger 5 is connected with the heat user 12 through the main heating pipeline 22, a secondary side inlet of the primary plate type heat exchanger 5 is connected with the heat user 12 through the main heating water return pipeline 23, a secondary side outlet of the secondary plate type heat exchanger 6 is connected with one end of an auxiliary heating pipeline 24, and the other end of, the secondary side inlet of the secondary plate heat exchanger 6 is connected with one end of an auxiliary heating water return pipeline 25, the other end of the auxiliary heating water return pipeline 25 is connected to a main heating water return pipeline 23, the auxiliary heating pipeline 24 and the auxiliary heating water return pipeline 25 are connected in parallel with a compression heat pump unit 13, a first heat storage valve 31 is arranged on the other branch of the geothermal water supply pipeline 16, a second heat storage valve 32 is arranged on a third geothermal water bypass pipeline 19, a first heat release valve 33 is arranged on a heat release pipeline 20, a second heat release valve 34 and a heat release water pump 27 are arranged on the heat release side water supply and return pipeline 21, a ninth valve 45 is arranged on the main heating pipeline 22, a tenth valve 46 and an eleventh valve 47 are arranged on the auxiliary heating pipeline 24, a heating circulating pump 28 and a twelfth valve 48 are arranged on the main heating water return pipeline 23, a thirteenth valve 49 is arranged on the auxiliary heating water return pipeline 25, A fourteenth valve 50 and a heat pump intermediate water circulation pump 29, wherein the compression heat pump unit 13 is connected in parallel with the first heat pump bypass valve 17 and the second heat pump bypass valve 18, respectively, the compression heat pump unit 13 includes a condenser 1301, an evaporator 1302, a throttle valve 1303, a compressor 1304, a first stop valve 1305, a second stop valve 1306, a third stop valve 1307, a fourth stop valve 1308, a first three-way valve 1309, a second three-way valve 1310, a third three-way valve 1311, and a fourth three-way valve 1312, the secondary heating pipe 24 is connected in series with the first stop valve 1305, the first three-way valve 1309, the second stop valve 1306, and the second three-way valve 1310, respectively, two ends of the first heat pump bypass valve 35 are connected to the other ends of the first three-way valve 1309 and the second three-way valve 1310, the secondary heating water return pipe 25 is connected in series with the third stop valve 1307, the third three-way valve 1308, the fourth stop, the two ends of the second heat pump bypass valve 36 are respectively connected to the other ends of a third three-way valve 1308 and a fourth three-way valve 1312, the condenser 1301, the compressor 1302, the evaporator 1303 and the throttle 1304 are connected in series, the condenser 1301 is positioned between a first stop valve 1305 and a second stop valve 1306, and the evaporator 1303 is positioned between a third stop valve 1307 and a fourth stop valve 1308; the heat pump unit can also adopt a fuel gas absorption heat pump unit.
The water supplementing system comprises a softened water device 15, a softened water tank 14, a water supplementing constant pressure pump 30 and a fifteenth valve 51, municipal tap water is connected with the softened water device 15 through a tap water pipeline, the softened water device 15 is connected with the softened water tank 14, the softened water tank 14 is connected to a main heating water return pipeline 23 through a water supplementing pipeline 26, and the fifteenth valve 51 and the water supplementing constant pressure pump 30 are arranged on the water supplementing pipeline 26; municipal tap water enters the water softening device 15 to remove scale ions such as calcium and magnesium in the water, then enters the water softening tank 14, the water softening tank 14 is connected with the main heating water return pipe 24 to supply cold water, and the water temperature of the heating water return pipe 24 is adjusted, so that the water softening device is convenient to use.
A branch of the geothermal water supply pipeline 16, a main heating pipeline 22, a main heating water return pipeline 23, a first geothermal water bypass pipeline 17 and a second geothermal water bypass pipeline 18 are all provided with a water drain valve, and the main heating pipeline 22, the main heating water return pipeline 23 and the water supply pipeline 26 are all provided with check valves.
Geothermal fluid is pumped to the ground layer by a geothermal production well group through a hot water submersible pump, sand is removed by a cyclone sand remover 4 after being converged by a water collector 3, geothermal water after sand removal enters a primary plate heat exchanger 5 through a geothermal water supply pipeline 16 to heat part of heating return water sent by a heating circulating pump, then the geothermal water is directly supplied to a heat user 12 through a main heating pipeline 22, the geothermal fluid is sent out after heat exchange by the primary plate heat exchanger 5, the geothermal water can be sent into a secondary plate heat exchanger 6 through a first geothermal water bypass pipeline 17 to be further utilized in a stepped manner, the geothermal fluid exchanges heat with intermediate circulating water sent by a heat pump intermediate water circulating pump 29, the geothermal fluid enters an evaporator of a hot-press heat pump unit 13 to be heated, and then exchanges heat with the heating circulating water sent by a condenser 1301 and an auxiliary heating return water pipeline 25, and the geothermal fluid is sent to the main heating pipeline 22 through an auxiliary heating. Geothermal tail water from the secondary plate heat exchanger 6 enters a filtering device 7 for filtering, and then is sent to a water separator 9 by a recharging booster pump 8 and is distributed to a geothermal recharging well group 10 to complete geothermal fluid same-layer recharging treatment.
When the initial and final cold air and outdoor temperature are higher, the heat supply demand is less than the full load heat supply capacity of the geothermal well group, the first heat storage valve 31 and the second heat storage valve 32 are opened, the surplus geothermal energy is stored in the heat storage device 11, and the first heat release valve 33 and the second heat release valve 34 are closed. Along with the increase of the outdoor temperature, the first heat pump bypass valve 35 and the second heat pump bypass valve 36 can be opened, and the first stop valve 1305, the second stop valve 1306, the third stop valve 1307 and the fourth stop valve 1308 are closed, so that the heating load is further reduced, and the operation cost is reduced.
When the temperature is lower in severe cold period and outdoor temperature and the heat supply demand is larger than the full load heat supply capacity of the geothermal well group, the first heat storage valve 31 and the second heat storage valve 32 are closed, the first heat release valve 33 and the second heat release valve 34 are opened, the heat stored in the heat storage device 11 is released, a centralized heat supply mode of double heat sources of the geothermal production well group and the heat storage device is formed, and the heat supply capacity of the system is increased.
When the geothermal heating system is in failure or needs to be overhauled to cause temporary shutdown, the heat storage device 11 can be used as a standby heat source, and the heat storage device 11 can be a device based on any one or combination of several principles of sensible heat storage, latent heat storage and thermochemical heat storage.
The electromagnetic flowmeter is arranged on the geothermal water supply pipeline, and when the content of geothermal water is high, a gas-water separation device and a pipeline booster pump can be arranged between the cyclone desander 4 and the first-stage plate heat exchanger 5 as well as between the cyclone desander and the heat storage device 11; the first-stage plate heat exchanger 5 and the second-stage plate heat exchanger 6 both adopt titanium plate heat exchangers.
The utility model discloses both can regard as independent heating system, also can regard as the subsystem that contains the integrated heating system of multiple energy of other energy types.
It should be noted that the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (9)
1. A heat storage type geothermal efficient centralized heating system comprises a heat collecting circulation system, a heat supply circulation system and a water supplementing system, and is characterized in that the heat collecting circulation system comprises a water collecting well, a water collecting pump, a water collector, a rotational flow desander, a primary plate heat exchanger, a secondary plate heat exchanger, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, an eighth valve, a filtering device, a recharging pressure pump, a water separator and a recharging well, wherein the water collecting pump is placed in the water collecting well and is connected with a water inlet of a water collecting pipeline, a water outlet of the water collecting pipeline is connected with a water inlet of the rotational flow desander through a pipeline, a water outlet of the rotational flow desander is connected with a geothermal water supply pipeline, a branch of the geothermal water supply pipeline is connected with a primary side inlet of the primary plate heat exchanger, a primary side outlet of the first-stage plate type heat exchanger is connected with a primary side inlet of the second-stage plate type heat exchanger through a branch of a first geothermal water bypass pipeline, the other branch of the first geothermal water bypass pipeline is connected with a second geothermal water bypass pipeline connected with a primary side outlet of the second-stage plate type heat exchanger in parallel to a filter device, the filter device is connected with a water distributor through a geothermal water return pipeline, the water distributor is connected to a recharging well, a first valve and a second valve are arranged on one branch of the geothermal water supply pipeline, a third valve, a fourth valve and a fifth valve are arranged on the first geothermal water bypass pipeline, a sixth valve is arranged on the second geothermal water bypass pipeline, and a seventh valve and an eighth valve are arranged on the geothermal water return pipeline;
the heat supply circulating system comprises a heat storage device, a heat pump unit, a heat consumer, a heat release water pump, a heating circulating pump, a heat pump intermediate water circulating pump, a first heat storage valve, a second heat storage valve, a first heat release valve, a second heat release valve, a first heat pump bypass valve, a second heat pump bypass valve, a ninth valve, a tenth valve, an eleventh valve, a twelfth valve, a thirteenth valve and a fourteenth valve; the other branch of the geothermal water supply pipeline is connected with a primary side inlet of the heat storage device, a primary side outlet of the heat storage device is connected to a first geothermal water bypass pipeline through a third geothermal water bypass pipeline, a secondary side outlet of the heat storage device is connected to a main heating pipeline through a heat release pipeline, a secondary side inlet of the heat storage device is connected with a water outlet of a heat release side water supply return pipeline, a water inlet of the heat release water supply return pipeline is connected with a main heating water return pipeline, a secondary side outlet of the primary plate type heat exchanger is connected with a heat user through a main heating pipeline, a secondary side inlet of the primary plate type heat exchanger is connected with the heat user through a main heating water return pipeline, a secondary outlet of the secondary plate type heat exchanger is connected with one end of a secondary heating pipeline, the other end of the secondary heating pipeline is connected to the main heating pipeline, and a secondary side inlet of the secondary, the other end of the auxiliary heating water return pipeline is connected to the main heating water return pipeline, the auxiliary heating pipeline and the auxiliary heating water return pipeline are connected with a heat pump component in parallel, a first heat storage valve is arranged on the other branch of the geothermal water supply pipeline, a second heat storage valve is arranged on the third geothermal water by-pass pipeline, the heat release pipeline is provided with a first heat release valve, the heat release side water supply and return pipeline is provided with a second heat release valve and a heat release water pump, a ninth valve is arranged on the main heating pipeline, a tenth valve and an eleventh valve are arranged on the auxiliary heating pipeline, the main heating water return pipeline is provided with a heating circulating pump and a twelfth valve, the heat pump unit is respectively connected with the first heat pump bypass valve and the second heat pump bypass valve in parallel, a thirteenth valve, a fourteenth valve and a heat pump intermediate water circulating pump are arranged on the auxiliary heating water return pipeline;
the water supplementing system comprises a softened water device, a softened water tank, a water supplementing constant-pressure pump and a fifteenth valve, municipal tap water is connected with the softened water device through a tap water pipeline, the softened water device is connected with the softened water tank, the softened water tank is connected to a main heating water return pipeline through a water supplementing pipeline, and the water supplementing pipeline is provided with the fifteenth valve and the water supplementing constant-pressure pump.
2. The heat-storage type geothermal efficient centralized heating system according to claim 1, wherein the water extraction pump is a hot water submersible pump for a geothermal well.
3. The heat-storage type geothermal efficient centralized heating system according to claim 1, wherein an electromagnetic flow meter is arranged on the geothermal water supply pipeline.
4. The heat-storage type geothermal efficient centralized heating system according to claim 1, wherein a gas-water separation device and a pipeline booster pump are arranged between the cyclone desander and the first-stage plate heat exchanger and the heat storage device.
5. The heat-storage geothermal efficient centralized heating system according to claim 1, wherein the heat pump unit is a compression heat pump unit, the compression heat pump unit comprises a condenser, an evaporator, a throttle valve, a compressor, a first stop valve, a second stop valve, a third stop valve, a fourth stop valve, a first three-way valve, a second three-way valve, a third three-way valve and a fourth three-way valve, the auxiliary heating pipeline is sequentially connected in series with the first stop valve, the first three-way valve, the second stop valve and the second three-way valve, two ends of the first heat pump bypass valve are respectively connected to the other ends of the first three-way valve and the second three-way valve, the auxiliary heating water return pipeline is sequentially connected in series with the third stop valve, the third three-way valve, the fourth stop valve and the fourth three-way valve, two ends of the second heat pump bypass valve are respectively connected to the other ends of the third three, the condenser, the compressor, the evaporator and the throttle valve are connected in series, the condenser is located between the first stop valve and the second stop valve, and the evaporator is located between the third stop valve and the fourth stop valve.
6. The heat-storage type geothermal efficient centralized heating system according to claim 1, wherein the heat pump unit is a gas absorption heat pump unit.
7. The heat-storage geothermal efficient centralized heating system according to claim 1, wherein a branch of the geothermal water supply pipeline, the main heating water return pipeline, the first geothermal water bypass pipeline and the second geothermal water bypass pipeline are all provided with a drain valve.
8. The heat-storage type geothermal efficient centralized heating system according to claim 1, wherein check valves are disposed on the main heating pipe, the main heating water return pipe and the water supply pipe.
9. The heat-storage type geothermal efficient centralized heating system according to claim 1, wherein the primary plate heat exchanger and the secondary plate heat exchanger are both titanium plate heat exchangers.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283789A (en) * | 2020-07-20 | 2021-01-29 | 中国建筑股份有限公司 | Geothermal gradient utilization heating system with low operation cost |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112283789A (en) * | 2020-07-20 | 2021-01-29 | 中国建筑股份有限公司 | Geothermal gradient utilization heating system with low operation cost |
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