CN109654581B - Season-crossing heat storage composite heating system based on confined aquifer - Google Patents
Season-crossing heat storage composite heating system based on confined aquifer Download PDFInfo
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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
- F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
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Abstract
The invention provides a compound heating system of cross-season heat storage based on a confined aquifer, which combines a cross-season heat storage heating technology with an underground aquifer recharging energy storage technology, uses an original aquifer which can not continuously mine underground water due to the reduction of underground water level as an energy storage device, and reconstructs an original hot well into a heat storage well and a heat collection well; in non-heating seasons, the water is heated by energy provided by solar energy and other energy sources and then is fed back into the heat storage well, and heat preservation and storage are carried out by means of the characteristics of low flow rate and small heat loss of an underground aquifer; in the heating season, the stored hot water is extracted from the underground aquifer through the heat collecting well and is respectively conveyed to each heating user by the heating unit. The invention has the advantages of large energy capacity, low cost, environmental protection, no pollution, good reliability and stability, and remarkable economic and social benefits.
Description
Technical Field
The invention belongs to the technical field of heating equipment, and particularly relates to a seasonal heat storage composite heating system based on a confined aquifer.
Background
In recent years, due to the requirement of environmental protection, heating energy in many places in the north of China has gone on the way of reforming coal-to-natural gas, but due to the problems of short time, heavy task, insufficient natural gas storage capacity in China and the like, the phenomena of serious shortage of heating energy and suffering of residents from stopping heating occur in many places. In order to solve the problems of winter heating and the shortage of non-renewable energy sources, a mature novel renewable clean energy source is urgently needed to be found, and the system comprises the collection, storage and utilization of new energy sources and is a complete and rigorous system.
The popular small household solar water heater system and other similar solar heat storage devices are used for short-term heat storage of solar heat supply. Due to the characteristics of low solar energy density on the earth surface, alternate change of seasons and day and night and the like, a short-term heat storage system for solar heat supply inevitably has great instability, so that the solar utilization efficiency is very low.
In addition, heating by adopting geothermal resources is also a commonly used heating means at present. In China, particularly in northern areas, the method of extracting underground hot water as a heating source is very common, the mining history is 40-50 years, but excessive mining causes the underground water level of partial areas to drop, the ground bottom has a plurality of holes with different sizes, the ground is settled in different degrees, great potential safety hazards exist, and the large-area collapse of the areas and even cities is seriously and possibly caused. Therefore, some cities such as Shanghai also start the related engineering of groundwater recharge years ago to avoid ground settlement caused by groundwater level drop.
Disclosure of Invention
In order to solve the technical problems, the invention provides a compound heating system based on cross-season heat storage of a confined aquifer, which comprises a heat storage well, a heat collecting well and a heat collecting device; the heat storage well and the heat recovery well are arranged on the same confined aquifer, and the horizontal position of the bottom of the heat storage well is higher than that of the bottom of the heat recovery well; the heat collecting device is connected with a wellhead at the upper end of the heat storage well through a second pipeline, a heat storage well control valve is arranged on the second pipeline adjacent to the wellhead at the upper end of the heat storage well, and a heat storage well water pump is arranged on the second pipeline between the heat storage well control valve and the heat collecting device; the inlet at the upper end of the heat production well is connected with the heat supply center through a third pipeline, a heat production well control valve is arranged on the third pipeline adjacent to the inlet at the upper end of the heat production well, and a heat production well water pump is arranged on the third pipeline between the heat production well control valve and the heat supply center.
The invention combines the cross-season heat storage heating technology with the underground confined aquifer recharging energy storage technology, leads water into a heat collection device for heating and then recharges the water into a heat storage well, and carries out heat preservation and storage by the characteristics of slow flow rate and small heat loss of the confined aquifer; in the heating season, the stored hot water is extracted from the confined aquifer through the heat collecting well and is respectively conveyed to each heating user by the heating unit.
Furthermore, the heat collecting device is a solar heat collecting system.
Furthermore, the composite heating system also comprises a water storage tank, and the water storage tank is communicated with the heat collection device through a first pipeline.
Further, a nitrogen tank is arranged on the second pipeline between the heat storage well and the heat storage well control valve, and/or a nitrogen tank is arranged on the third pipeline between the heat extraction well and the heat extraction well control valve.
Further, the heat storage well water pump with between the heat storage well control valve be provided with well head instrumentation on the second pipeline, and/or, the heat recovery well water pump with between the heat recovery well control valve be provided with well head instrumentation on the third pipeline.
Further, the wellhead detecting instrument comprises a flow detecting device, a temperature detecting device and a pressure detecting device. The flow detection device is preferably an electromagnetic flowmeter, the temperature detection device is preferably an integrated temperature selector, and the pressure detection device is preferably a pressure selector.
Furthermore, a dirt separator is arranged on the second pipeline between the wellhead detection instrument and the heat storage well control valve and used for neutralizing the pH value of the recharge water, so that the recharge water is prevented from corroding the heat storage well.
Furthermore, an exhaust tank is arranged on the second pipeline between the heat collection device and the heat storage well water pump and used for exhausting air carried by water flowing out of the solar heat collection system.
Furthermore, the heat collection device is communicated with the heat supply center through a winter heat supply control valve.
Further, the heat storage underground port is provided with a heat storage well water filter pipe, and/or the heat production underground port is provided with a heat production well water filter pipe. The heat storage well water filter pipe and the heat production well water filter pipe are pipelines with a plurality of small holes, so that small bubbles can be effectively prevented from being attached to the pipe wall, air infiltration is prevented, and blockage of the heat storage well and the heat production well is avoided. Furthermore, a sand remover is arranged on the third pipeline between the heat production well water pump and the heat supply center and used for filtering impurities such as sand and mud in water.
And further, the heating tail water is introduced into the reservoir and enters the water circulation of the composite heating system again.
Furthermore, a filtering purifier is arranged on the first pipeline to ensure that the filtered water meets the requirement of back irrigation water and cannot corrode the pipeline and related equipment.
Further, the water storage tank is connected with a hot water supply source.
Furthermore, an automatic water replenishing device is arranged on the first pipeline.
Compared with the prior art, the invention has the beneficial effects that:
the invention fully utilizes the characteristics of large volume, good heat preservation and small loss of the underground confined aquifer as a heat storage device, combines the cross-season heat storage heating technology, realizes the storage and output of the energy storage hot water in non-heating seasons and heating seasons by devices such as a water pump, a control valve and the like, and realizes the purpose of cross-season, pollution-free and sustainable energy storage circulation heating. The underground pressure-bearing water storage layer applied in the invention is a bottom water outlet layer which cannot be exploited any more or has insufficient output due to the reduction of the underground water level, belongs to resource recycling, can greatly reduce the construction of a primary pipe network, and saves a large amount of capital construction cost; in addition, the circulation utilization of the heating tail water and the supply of other water sources ensure that the hot water recharging amount is larger than the extraction amount, and the geological settlement can be effectively relieved. In conclusion, the invention has the advantages of large energy capacity, low cost, environmental protection, no pollution and the like, has better reliability and stability, and has remarkable economic and social benefits.
Drawings
FIG. 1 is a schematic diagram of a cross-season thermal storage hybrid heating system based on a confined aquifer; wherein:
1 supplying hot water; 2, a water reservoir; 3, a filtering purifier; 4, an automatic water replenishing device; 5, a solar heat collection system; 6, an exhaust tank; 7, a heat storage well water pump; 8 wellhead instrumentation; 9 a dirt separator; 10 heat storage well control valve; 11 heat storage wells; 12, a nitrogen tank; 13 heat storage well water filter pipe; 14-production heat well water filter pipes; 15 heat recovery wells; 16 thermal well control valves; 17, a hot well water pump is adopted; 18 a desander; 19 a heating center; 20 a heat exchange station; 21, heating users; 22 winter heating control valve.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the 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 therefore, should not be taken as limiting the scope of the present invention.
The following describes in further detail an embodiment of the present invention with reference to fig. 1.
A compound heating system of cross-season heat storage based on confined aquifer comprises a heat storage well 11, a heat collecting well 15, a water storage tank 2 and a solar heat collecting system 5;
an outlet of the water storage tank 2 is communicated with a water inlet of the solar heat collecting system 5 through a first pipeline, a filtering purifier 3 is arranged on the first pipeline, and water in the water storage tank 2 passes through the filtering purifier 3 so as to ensure that the water quality meets the requirement of reinjection water and cannot corrode the pipeline and related equipment; an automatic water replenishing device 4 is arranged on a first pipeline between the filtering purifier 3 and the solar heat collecting system 5; the automatic water replenishing device 4 can be directly connected with a tap water pipeline;
the water heated to the designed temperature by the solar heat collection system 5 flows out from a water outlet of the solar heat collection system 5 and is connected to a wellhead at the upper end of the heat storage well 11 through a second pipeline; an exhaust tank 6, a heat storage well water pump 7, a well mouth detection instrument 8, a dirt separator 9, a heat storage well control valve 10 and a nitrogen tank 12 are sequentially arranged on the second pipeline from one end adjacent to the solar heat collection system 5; the exhaust tank 6 is used for exhausting air carried by water flowing out of a water outlet of the solar heat collecting system 5; a heat storage well water filter pipe 13 is arranged at the lower port of the heat storage well 11, the heat storage well 11 and the heat production well 15 are arranged on the same confined aquifer, the lower port of the heat storage well 11 is communicated with the lower port of the heat production well 15 through the same confined aquifer, and a heat production well water filter pipe 14 is arranged at the lower port of the heat production well 15; the heat storage well 11 and the heat extraction well 15 can be respectively formed by reforming geothermal wells which originally exploit underground water and belong to the same confined aquifer, and the horizontal position of the bottom of the heat storage well 11 is higher than that of the bottom of the heat extraction well 15;
the wellhead at the upper end of the heat recovery well 15 is connected with the heat supply center 19 through a third pipeline; from one end of the wellhead adjacent to the upper end of the heat production well 15, the third pipeline is sequentially provided with a nitrogen tank 12, a heat production well control valve 16, a wellhead detection device 8, a heat production well water pump 17 and a desander 18;
in the heating season, the water heated by the solar heat collecting device 5 can also be directly conveyed to the heat supply center 19 through the exhaust tank 6, and the switch of a hot water pipeline is controlled between the exhaust tank 6 and the heat supply center 19 through the winter heat supply control valve 22;
the heat supply center 19 inputs hot water into the heating device of each heating user 21 through each heat exchange station 20 to supply heat to the heating user 21; heating tail water directly flows into the reservoir 2 through the inlet of the reservoir 2 and then enters the water circulation of the composite heating system again; the inlet of the water storage tank 2 is also connected with a hot water supply source 1, so that water can be conveniently stored in the water storage tank 2 at any time for centralized treatment.
In the invention, the wellhead detecting instrument 8 comprises a flow detecting device, a temperature detecting device and a pressure detecting device, wherein the flow detecting device is preferably an electromagnetic flowmeter, the temperature detecting device is preferably an integrated temperature selector, and the pressure detecting device is preferably a pressure selector. The wellhead detection device 8 is mainly used for monitoring the quality, quality and various dynamic parameters of geothermal resource production, can acquire necessary dynamic data, and can monitor the running state of the system in time to ensure the normal running of the system.
In the present invention, the nitrogen tank 12 is preferably an automatically controlled inflator to ensure that no air is permeated into the pipeline and to prevent corrosion of the pipeline.
In the invention, the on-off of the heat storage well control valve 10 and the on-off of the heat production well control valve 16 can be controlled by a single chip microcomputer.
In the invention, the heat storage well water pump 7 and the heat production well water pump 17 preferably adopt centrifugal water pumps, adopt variable frequency control, and adjust the frequency of a frequency converter according to the real-time dynamic state of the water outlet pressure of the water pumps, thereby better meeting the heating requirement.
In the present invention, the source of the hot water supply source 1 is very wide, and urban water, river water, etc. can be selected according to local conditions.
The invention provides a compound heating system based on cross-season heat storage of a confined aquifer for cross-season heat storage heating, which comprises heat storage in non-heating seasons and heat storage heating in application in heating seasons, and specifically comprises the following steps:
in non-heating seasons, a water reservoir 2 is used for concentrating waste water produced by a hot water supply source 1 and previous heating, filtering and purifying are carried out through a filtering purifier 3 to reach the water quality standard of underground recharge water, then a solar heat collecting system 5 absorbs solar energy to heat the filtered water to the designed temperature, a heat storage well water pump 7 is used for storing hot water in an underground confined aquifer through a heat storage well 11, the flow rate and the total amount of stored hot water are controlled through a heat storage well control valve 10 and a flow detection device, and the stored hot water is guaranteed to flow according to the designed trend; and the temperature change of the energy storage hot water is monitored in real time through a temperature detection device.
The specific operation contents of the composite heating system in the non-heating season comprise: recording initial readings of testing instruments such as flow detection devices of wellhead detection instruments 8 of the heat recovery well 15 and the heat storage well 11, and measuring original parameters such as water levels and water temperatures in the heat recovery well 17 and the heat storage well 11; sealing the wellhead of the heat recovery well 17, fastening and sealing strictly, pulling vacuum, closing the heat recovery well control valve 16 and the winter heat supply control valve 22, and stopping the work of the heat recovery well water pump 17; but the monitoring of the wellhead detecting instrument 8 on the heat recovery well 17 is continuously kept, the water pump 17 of the heat recovery well is periodically checked, the service condition of the wellhead detecting instrument 8 is detected, the maintenance measures of corrosion prevention, rust prevention and the like of the device are well made, and the normal operation of monitoring is ensured. Water accumulated in the reservoir 2 flows into a solar heat collecting device 5 through a filter purifier 3 to be heated into recharge hot water, a heat storage well control valve 10 is opened, after the recharge hot water overflows from an exhaust tank 6, an exhaust valve of the exhaust tank 6 is closed tightly, the flow is regulated, and the water quantity, the water temperature and the pressure of the recharge hot water are recorded; and starting a heat storage well water pump 7 for pressurizing and recharging. When recharging, firstly, pulling vacuum, discharging air in a pipeline and a pump pipe, and ensuring vacuum sealing of each link; ensuring that the pump pipe is arranged below the water surface of the heat storage well 11, and recharging hot water is injected from the pump pipe to ensure the recharging of the vacuum pump pipe; the recharging amount and the pressure are gradually adjusted from small to large until the recharging can normally run; the heat storage well water pump is preferably a centrifugal pump, and water is not cut off to drive the pump empty, otherwise air is pumped into the well, and blockage and corrosion are caused.
In the heating season, the energy storage hot water stored in the underground pressure-bearing water-containing layer is pumped out of the heat production well 15 by the heat production well water pump 17, and the hot water enters the desander 18 for filtration through the heat production well control valve 16; the heat recovery well control valve 16 and the flow detection device ensure the balance of the inlet and outlet of hot water; the filtered hot water is directed to a heating center 19, and the heating center 19 supplies the hot water to heating users 21 through respective heat exchange stations 20. The tail water produced by heating is introduced into the reservoir 2 again, and then is filtered by the filter purifier 3, so that impurities brought to the tail water of heating by a pipeline and a heat exchanger are eliminated; the filtered water and the water supplemented by the automatic water supplementing device 4 pass through the solar thermal collector 5 for heating and the exhaust tank 6 for exhausting, and are re-filled into the heat storage well by the heat storage well water pump 7 to complete the heat supply circulation; or the hot water heated by the solar heat collector 5 and exhausted by the exhaust tank 6 is directly transmitted to the heat supply center 19 through the winter heat supply control valve 22, and the amount of the hot water introduced into the heat supply center 19 is controlled by adjusting the winter heat supply control valve 22.
The specific operation contents of the composite heating system in the heating season include: recording initial readings of instruments such as flow detection devices of wellhead detection instruments 8 of the heat recovery well 15 and the heat storage well 11, and measuring original parameters such as water levels and water temperatures in the heat recovery well 17 and the heat storage well 11; before the heat recovery well 15 is exploited, the on-off states of a power supply, each device and a valve are checked, the sealed operation in the system is ensured, the filtering effect of the sand remover 18 is checked, and the anti-freezing measure of an outdoor pipeline is made; and after the normal operation of the detection system is ensured, closing the control valve 16 of the heat production well, and starting the water pump 17 of the heat production well for pressurized production. In the mining operation, the system sealing must be strictly ensured, the open port which comprises a measuring pipe, an inflation hole and the like and is communicated with the outside is prevented from being opened, and the operation with oxygen is strictly forbidden; closely monitor the change of data such as water level, water quality, pressure of each instrument and pipeline, correctly judge the running condition of the system, and take effective measures to prevent and treat in time. Meanwhile, the solar heat collection device 5 operates normally, the winter heat supply control valve 22 is closed, and the heated hot water is directly supplied to the heat supply center 19, so that the source of the heat source is sufficient.
And after the heating in the heating season is finished, the heating tail water of the heating system is collected into the water storage tank 2 again through the pipeline to wait for reutilization, so that the water resource recycling of cross-season heating is realized.
The composite heating system based on the cross-season heat storage of the confined aquifer combines a cross-season heat storage heating technology with an underground aquifer recharging energy storage technology, uses an original aquifer which cannot be continuously exploited to underground water due to the reduction of the underground water level as an energy storage device, and reconstructs an original hot well into a heat storage well 11 and a heat exploitation well 15; in non-heating seasons, water is filtered, the water is heated by the energy provided by solar energy, hot water is re-filled into the heat storage well 11, heat preservation and storage are carried out by means of the characteristics of low flow rate and small heat loss of an underground water-bearing layer, and the heat provided by solar energy in the non-heating seasons is stored in the underground water-bearing layer seasonally; when the season of heating comes, the stored hot water is extracted from the underground aquifer through the heat collecting well 15 and is respectively conveyed to each heating user by the heating unit after sand removal treatment; the heating tail water can enter the water circulation of the compound heating system again after being filtered.
The invention fully utilizes the characteristics of large volume, good heat preservation and small loss of the underground confined aquifer as a heat storage device, combines the season-crossing solar heat storage heating technology, realizes the storage and output of the energy storage hot water in non-heating seasons and heating seasons by devices such as a water pump, a control valve and the like, and realizes the purpose of season-crossing, pollution-free and sustainable solar energy storage circulation heating. The underground pressure-bearing water storage layer applied in the invention is a bottom water outlet layer which cannot be exploited any more or has insufficient output due to the reduction of the underground water level, belongs to resource recycling, can greatly reduce the construction of a primary pipe network, and saves a large amount of capital construction cost; in addition, the circulation utilization of the heating tail water and the supply of other water sources ensure that the hot water recharging amount is larger than the extraction amount, and the geological settlement can be effectively relieved. In conclusion, the invention has the advantages of large energy capacity, low cost, environmental protection, no pollution and the like, has higher economical efficiency, reliability and stability, and has remarkable economic benefit and social benefit.
In the invention, the depth, the water temperature and the water quantity of the confined aquifer are important indexes for measuring the utilization value and risk evaluation of the stratum, and the proper confined aquifer is selected as a foundation to construct the compound heating system based on the seasonal heat storage of the confined aquifer, which is provided by the invention, so that higher economic benefit can be obtained and the risk can be reduced. Based on the prior art, the confined aquifer with the water yield of 40-100m3/h and the water temperature of 45-65 ℃ is relatively more suitable for constructing the composite heating system based on the seasonal heat storage of the confined aquifer, and more ideal economic benefit can be obtained. The depth of the confined aquifer directly influences the stability and risk of the compound heating system based on the cross-season heat storage of the confined aquifer, and is also a factor which needs to be considered in the selection of the confined aquifer.
Analysis of economic benefits
The composite heating system based on the cross-season heat storage of the confined aquifer has very obvious energy-saving and emission-reducing effects, and takes the Tianjin area as an example:
geographic location: 39.02 ° N117.65 ° E
Local direct radiation intensity (DNI):
solargis data: 1123kWh/m2
NASA data: 2033kWh/m2
Local direct radiation data is selected from solargis 50% + NASA 50%, namely 1578kWh/m2 is 5680 MJ/square meter, because the project address is 39.02 degrees N, the solar heat collection device adopts a groove type solar heat collection system, the solar heat collection device adopts east-west arrangement, and the heat collection area is as follows: the land area is 1: 2. If the laying area is 4 square meters, the heat collection area is 2 square meters. The annual average efficiency of the groove type solar heat collection system arranged in the east-west direction is more than 55 percent, so the annual heat quantity QY of a heat collection field is 5680 MJ/55 percent of square meter/20000 square meter is 6.25/107MJ。
According to the calculation that the solar heat collection device heats water from 20 ℃ to 50 ℃, the water yield of 50 ℃ hot water produced every year is as follows:
QY*1000KJ/MJ/(1000Kg/t*4.18KJ/Kg·℃*(50℃-20℃))
＝4.98*105t
approximately 50 ten thousand tonnes of water can provide essentially 130 ten thousand square meters of normal heating in winter (commercial area: domestic area: 3: 7).
Therefore, if the heat collector occupies 4 ten thousand square meters in total, the area of the heat collector is 2 ten thousand square meters, and the annual heat production quantity reaches 6.25 x 107MJ can save more than ten thousand of electric energy 1736, calculate according to the price of electricity of 0.6 yuan/degree, can save more than 1041.67 yuan of electricity charge each year.
The composite heating system provided by the invention has a good effect on reducing the emission of various pollutants. One ton of standard coal can generate three kilowatt-hours (3000 degrees) of electricity. And every ton of standard coal is burnt by the industrial boiler, 2620 kg of carbon dioxide, 8.5 kg of sulfur dioxide and 7.4 kg of nitrogen oxides are produced. Annual production of 6.25 x 107MJ heat is an example, and the specific reduction capacity is detailed in table 1:
TABLE 1 statistical table of energy-saving effect
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered by the claims of the present invention.
Claims (9)
1. The compound heating system based on the cross-season heat storage of the confined aquifer is characterized by comprising a heat storage well (11), a heat collecting well (15), a water storage tank (2) and a heat collecting device; the heat storage well (11) and the heat recovery well (15) are arranged on the same confined aquifer, and the horizontal position of the bottom of the heat storage well (11) is higher than that of the bottom of the heat recovery well (15); introducing water into a heat collection device for heating, and then recharging the water into a heat storage well, wherein the lower port of the heat storage well (11) is communicated with the lower port of the heat recovery well (15) through the same confined aquifer, and the stored hot water is extracted from the confined aquifer through the heat recovery well in the heating season; the water storage tank (2) is communicated with the heat collecting device through a first pipeline, the heat collecting device is connected with a well mouth at the upper end of the heat storage well (11) through a second pipeline, a heat storage well control valve (10) is arranged on the second pipeline adjacent to the well mouth at the upper end of the heat storage well (11), and a heat storage well water pump (7) is arranged on the second pipeline between the heat storage well control valve (10) and the heat collecting device; an inlet at the upper end of the heat collecting well (15) is connected with the heat supply center (19) through a third pipeline, the heat collecting well is adjacent to the inlet at the upper end of the heat collecting well (15), a heat collecting well control valve (16) is arranged on the third pipeline, the heat collecting well control valve (16) is arranged on the third pipeline between the heat supply center (19), and a heat collecting well water pump (17) is arranged on the third pipeline between the heat collecting well control valve (16) and the heat supply center (19), so that the heat supply tail water is recycled, and the supply of other water sources is realized, the hot water recharging amount is larger than the pumping.
2. Composite heating system according to claim 1, characterised in that said collecting means are solar collecting systems (5).
3. The hybrid heating system according to claim 1, wherein a wellhead detection instrument (8) is arranged on the second pipeline between the heat storage well water pump (7) and the heat storage well control valve (10), and/or a wellhead detection instrument (8) is arranged on the third pipeline between the heat recovery well water pump (17) and the heat recovery well control valve (16).
4. Composite heating system according to any one of claims 1-2, characterised in that the heat collecting device communicates with the heating centre (19) via a winter heating control valve (22).
5. A combined heating system according to any one of claims 1-2, characterised in that a desander (18) is arranged on the third conduit between the heat recovery well pump (17) and the heating centre (19).
6. Composite heating system according to claim 4, characterised in that heating tail water is passed into the reservoir (2).
7. Composite heating system according to claim 6, characterised in that a filter purifier (3) is arranged on the first pipe.
8. Composite heating system according to claim 7, characterised in that the reservoir (2) is connected to a hot water supply (1).
9. Composite heating system according to claim 7 or 8, characterised in that an automatic water replenishing device (4) is provided on the first pipe.
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| CN201820492487 | 2018-04-09 | ||
| CN2018204924873 | 2018-04-09 |
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| CN112413914B (en) * | 2020-11-25 | 2022-03-01 | 河北绿源地热能开发有限公司 | Negative-pressure-free geothermal recharging system and recharging method |
| CN114562823A (en) * | 2022-02-23 | 2022-05-31 | 四川纳川致远新能源科技有限公司 | Underground aquifer heat storage system based on underground microwave heating |
| CN115191279B (en) * | 2022-07-13 | 2024-02-23 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队) | Cross-season energy storage heating and ecological planting method |
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