CN114251711A - Active type middle-deep layer geothermal energy heat exchange station system and control method - Google Patents
Active type middle-deep layer geothermal energy heat exchange station system and control method Download PDFInfo
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- CN114251711A CN114251711A CN202111658484.5A CN202111658484A CN114251711A CN 114251711 A CN114251711 A CN 114251711A CN 202111658484 A CN202111658484 A CN 202111658484A CN 114251711 A CN114251711 A CN 114251711A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 197
- 230000001502 supplementing effect Effects 0.000 claims description 29
- 239000010865 sewage Substances 0.000 claims description 27
- 230000003020 moisturizing effect Effects 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000008234 soft water Substances 0.000 claims description 7
- 238000004378 air conditioning Methods 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000005338 heat storage Methods 0.000 abstract description 7
- 239000002689 soil Substances 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000013486 operation strategy Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
- F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
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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
- F24D19/0002—Means for connecting central heating radiators to circulation pipes
- F24D19/0014—Connection means adaptable for one and two pipe systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
- F28G15/003—Control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
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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
- F24D2200/00—Heat sources or energy sources
- F24D2200/11—Geothermal energy
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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
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/40—Geothermal heat-pumps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses an active type middle-deep geothermal energy heat exchange station system and a control method thereof, wherein a heat supply pipeline and a water return pipeline on a heat source side are connected with a heat exchanger, a heat source variable frequency control water pump is arranged on the heat supply pipeline on the heat source side connected with the heat exchanger, the heat supply pipeline of the heat exchanger is respectively connected with a plurality of middle-deep geothermal heat pump units through a variable frequency control heat taking pump, the heat supply pipelines of the plurality of middle-deep geothermal heat pump units are respectively connected with a water distributor through a first user warm water pump, the heat supply pipeline of the water distributor respectively supplies heat to a plurality of areas divided by a small area, the water return pipeline of the small area is connected with a water collector, the water return pipeline of the water collector is respectively connected with a plurality of middle-deep geothermal heat pump units, and the water return pipelines of the plurality of middle-deep geothermal heat pump units are connected with the heat exchanger. The invention gives play to the advantage of soil heat storage, and adopts the heat exchanger to isolate the heat source from the heat pump evaporator, thereby ensuring the heat source supply in continuous large-load output under the condition of extremely cold weather.
Description
Technical Field
The invention belongs to the technical field of middle-deep geothermal energy, and particularly relates to an active middle-deep geothermal energy heat exchange station system and a control method.
Background
The heat source characteristics of the geothermal hole of the medium-deep geothermal buried pipe system and the shallow geothermal hole are obviously different in heat source temperature, heat source response and heat source recovery. The heat conduction capability of deep rock and a deep high-temperature heat source are mainly utilized by the medium-deep geothermal energy, the output power of the geothermal hole is large, and the difference in the temperature of the heat source is large. The vertical temperature difference of the geothermal energy of the middle and deep layers on the stratum is about 10-90 ℃, and the temperature change of the water temperature of the heat source at each stage of the heating season is large.
The heat source characteristics of the geothermal hole of the middle-deep geothermal buried pipe system and the shallow geothermal hole are obviously different in the aspects of heat source temperature, heat source response and heat source recovery, and are mainly represented as follows:
1. the temperature difference of the stratum from top to bottom is large, the vertical temperature difference of the primary heat source side heat exchange medium under a static condition is continuously distributed between 10 and 90 ℃, and the maximum temperature of a shallow heat source is about 20 ℃.
2. The heat conduction capability of the rock in the middle-deep layer and the high-temperature heat source in the middle-deep layer are mainly utilized by the geothermal energy in the middle-deep layer, and the output heat energy power of the geothermal hole is larger.
3. The heat transfer and recovery capacity of the heat source in the middle and deep layers is strong, and the heat storage of the geothermal system in the shallow layer is used for guaranteeing the heating in the next year in summer.
Disclosure of Invention
In view of the above, the present invention provides an active type middle and deep geothermal energy heat exchange station system and a control method thereof.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the embodiment of the invention provides an active type middle-deep geothermal energy heat exchange station system which comprises a heat source side, a heat exchanger, a frequency conversion control heat pump, a middle-deep geothermal heat pump unit, a water separator and a water collector, wherein a heat supply pipeline and a water return pipeline on the heat source side are connected with the heat exchanger, a heat source frequency conversion control water pump is arranged on the heat supply pipeline connected with the heat exchanger on the heat source side, the heat supply pipeline of the heat exchanger is respectively connected with a plurality of middle-deep geothermal heat pump units through a frequency conversion control heat taking pump, the heat supply pipelines of the middle-deep geothermal heat pump units are respectively connected with the water separator through a first user warm water pump, the heat supply pipeline of the water separator respectively supplies heat to a plurality of areas divided by a small area, the water return pipeline of the small area is connected with the water collector, and the water return pipeline of the water collector is respectively connected with the middle-deep geothermal heat pump units, and the water return pipelines of the plurality of intermediate-deep geothermal heat pump units are connected with the heat exchanger.
In the scheme, the system further comprises a high-region heat supply assembly, a middle-region heat supply assembly and a low-region heat supply assembly, wherein the heat supply pipelines of the plurality of middle-deep geothermal heat pump units are respectively connected with the high-region heat supply assembly, the middle-region heat supply assembly and the low-region heat supply assembly, and the heat supply pipelines of the high-region heat supply assembly, the middle-region heat supply assembly and the low-region heat supply assembly respectively supply heat to corresponding regions of the residential area which are divided according to the height, the middle height and the low height of the floor.
In the above scheme, high district heat supply subassembly includes high district heat exchanger, high district warm water pump, well district heat supply subassembly includes well district heat exchanger, well district warm water pump, low district heat supply subassembly includes low district heat exchanger, low district warm water pump, a plurality of deep geothermal heat pump set's heat supply pipeline all is connected with second user warm water pump, second user warm water pump's heat supply pipeline is first all connected with high district heat exchanger, high district warm water pump in proper order, and the second way is connected with high district heat exchanger, high district warm water pump in proper order, and the third route is connected with low district heat exchanger, low district warm water pump in proper order, high district warm water pump, well district warm water pump, low district warm water pump's return water pipeline is connected with a plurality of deep geothermal heat pump set respectively.
In the scheme, the system further comprises a constant-pressure water supplementing and dirt cleaning assembly, wherein the constant-pressure water supplementing assembly is connected with a heat supply pipeline between the heat exchanger and the heat source side and a water return pipeline between the plurality of middle-deep geothermal heat pump units and the heat exchanger.
In the above scheme, the subassembly of decontaminating of level pressure moisturizing includes first air conditioner side level pressure moisturizing device, second air conditioner side level pressure moisturizing device, third air conditioner side level pressure moisturizing device, soft water tank, water softener, first air conditioner side level pressure moisturizing device and water collector, high district heat supply subassembly, the return water pipe connection of low district heat supply subassembly, the return water pipe connection between second air conditioner side level pressure moisturizing device and a plurality of deep geothermal heat pump set and the heat exchanger, the heat supply pipe connection between third air conditioner side level pressure moisturizing device and heat exchanger and the heat source side, the soft water tank is connected with first air conditioner side level pressure moisturizing device, second air conditioner side level pressure moisturizing device, third air conditioner side level pressure moisturizing device respectively, set up the water softener between soft water tank and the water source side.
In the above scheme, the third air conditioner side constant pressure water replenishing device is connected between the heat exchanger and the heat source variable frequency control water pump on one way, and is provided with the second valve V2 and the seventh valve V7 on the pipeline in sequence, and is connected between the heat source variable frequency control water pump and the heat source side on the other way, and is provided with the first valve V1 and the fifth valve V5 on the pipeline in sequence.
In the above scheme, set gradually sixth valve V6, eighth valve V8 on the wet return way between heat exchanger and the heat source side, and through the heat supply pipe connection between pipeline heat exchanger and the heat source side between sixth valve V6, the eighth valve V8, be provided with third valve V3 on this pipeline, be provided with the heat exchanger between heat source variable frequency control water pump and the heat source side and wash the pipeline, be provided with blowdown pipeline between fifth valve V5 and the heat source side, be provided with blowoff valve V4 on the blowdown pipeline.
The embodiment of the invention also provides a control method applied to any active type middle and deep layer geothermal energy heat exchange station system in the scheme, which is characterized by comprising the following steps:
opening all valves of the system, and starting the first user hot water pump or the second user hot water pump to establish user side circulation;
determining the working states of a plurality of intermediate-deep geothermal heat pump units according to the load condition;
and supplying heat to subareas with similar height of the building through the water separator, or supplying heat to subareas with larger height difference of the building through a high district heat supply assembly, a middle district heat supply assembly and a low district heat supply assembly.
In the above scheme, the control method further includes: before the heating season begins, injecting water into a user side pipeline, a water separator, a water collector and a heat exchanger through a second air conditioner side constant pressure water supplementing device, opening a highest air release valve of the pipeline, and starting the second air conditioner side constant pressure water supplementing device to supplement water until water flows out of the highest air release valve; and after the water injection of the user side is finished, injecting water into the pipeline and the heat exchanger on the heat source side through the third air conditioner side constant pressure water supplementing device.
In the above scheme, the control method further includes: fully flushing a geothermal hole on the heat source side; the method specifically comprises the following steps: opening a first valve V1, a third valve V3, a blowdown valve V4, a fifth valve V5 and an eighth valve V8, closing a second valve V2, starting a heat source variable-frequency control water pump, and observing whether the color of a blowdown pipeline is clear;
when the drainage color of the sewage pipeline changes, fully opening the sewage valve V4, closing the heat source variable frequency control water pump, simultaneously opening the second valve V2, closing the first valve V1, forcibly replenishing water into the pipeline through a third air conditioner side constant pressure water replenishing device, and discharging the sewage precipitated in the heat exchange hole through the sewage valve V4;
and observing the drainage of the sewage discharge pipeline again, if the sewage is changed into clear water from the sewage, opening the first valve V1, closing the second valve V2 and the sewage discharge valve V4, and finishing the flushing of the heat exchange hole on the heat source side.
Compared with the prior art, the invention can exert the advantage of soil heat storage, adopts the heat exchanger to isolate the heat source from the heat pump evaporator, and is convenient for the pressure and flow design of the systems at two sides, wherein the heat source side circulating pump intermittently and circularly heats the heat source side medium in the heat source recovery period or a plurality of weeks before the beginning of the heating season, so as to promote the underground deep layer heat source to uniformly heat the medium to about 80 ℃, and then conducts the underground heat to each layer around the upper layer of the heat exchange hole by circulating the heat source side medium for one time, so that the heat storage and energy storage are fully realized, and the heat source supply during continuous heavy load output under the extremely cold weather condition is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic structural diagram of an active type middle-deep geothermal energy heat exchange station system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, the terms describing the positional relationships in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, article, or apparatus that comprises the element.
The embodiment of the invention provides an active type middle-deep geothermal energy heat exchange station system, as shown in figure 1, the system comprises a heat source side 1, a heat exchanger 2, a variable frequency control heat taking pump 3, a middle-deep geothermal heat pump unit 4, a water separator 5 and a water collector 6, wherein a heat supply pipeline and a water return pipeline of the heat source side 1 are connected with the heat exchanger 2, a heat source variable frequency control water pump 101 is arranged on the heat supply pipeline connected with the heat exchanger 1 and the heat exchanger 2, the heat supply pipeline of the heat exchanger 2 is respectively connected with a plurality of middle-deep geothermal heat pump units 4 through the variable frequency control heat pump 3, the heat supply pipelines of the plurality of middle-deep geothermal heat pump units 4 are respectively connected with the water separator 5 through a first user heating water pump 401, the heat supply pipeline of the water separator 5 respectively supplies heat for a plurality of areas divided by a small area, the water return pipeline of the small area is connected with the water collector 6, the water return pipeline of the water collector 6 is respectively connected with the plurality of middle-deep geothermal heat pump units 4, and the water return pipelines of the plurality of middle-deep geothermal heat pump units 4 are connected with the heat exchanger 2.
The heat source side 1 adopts a system design of plate exchange for isolation, and provides an equipment foundation for different heat loads and different heat source capacities at the initial stage, the middle stage and the final stage of a heating season and the variable load operation of the intermediate-deep geothermal heat pump unit 4.
In the early stage of a heating season, a heat source is sufficient, but the load of a user is low; in the middle of the heating season, the user loads at night and in the day are different; at the end of the heating season, the heat source is exhausted, and the heat level is in a slow recovery stage; the operation manager can flexibly adjust the heat source input temperature through the plate exchange according to the operation strategy, so that the load of the heat pump unit is adjusted, or certain electric energy is consumed to supplement the heat source, or the heat source input temperature is increased, and the electric energy is saved.
Aiming at subarea heat supply districts with similar floor heights, a water separator 5 is adopted for subarea heat supply, and a plurality of intermediate-deep geothermal heat pump units 4 can be mutually standby, so that the investment is reduced.
In the low-load stage, the intermediate-deep geothermal heat pump units 4 can be operated continuously in a time-sharing mode, frequent starting of the heat pump units is reduced, the service life of the heat pump is prolonged, and equipment faults are reduced.
The heating temperature control in the district is convenient, and the fault maintenance in the user is convenient.
Further, the system also comprises a high-region heat supply assembly 7, a middle-region heat supply assembly 8 and a low-region heat supply assembly 9, wherein the heat supply pipelines of the plurality of middle-deep geothermal heat pump units 4 are respectively connected with the high-region heat supply assembly 7, the middle-region heat supply assembly 8 and the low-region heat supply assembly 9, and the heat supply pipelines of the high-region heat supply assembly 7, the middle-region heat supply assembly 8 and the low-region heat supply assembly 9 respectively supply heat to corresponding regions of the residential district divided according to the height, the middle height and the low height of the floor.
The heat exchanger is adopted to distribute heat sources in the subarea heat supply project with large floor height difference, the requirements for water supply pressure are different when the difference between the floors of the subdistricts is large, the high district heat supply assembly 7, the middle district heat supply assembly 8 and the low district heat supply assembly 9 are adopted to supply heat in subareas, the pressure of each subarea can be ensured, and the double-energy of the plurality of middle-deep layer geothermal heat pump assemblies 4 can be mutually reserved, so that the investment is reduced.
In the same low-load stage, the intermediate-deep geothermal heat pump units 4 can be operated continuously in a time-sharing mode, so that the frequent starting of the heat pump units is reduced, the service life of a heat pump is prolonged, and the equipment faults are reduced.
The heat supply temperature demand control in the district of being convenient for, keep apart middle and deep geothermal heat pump set 4 and user side through heat exchanger 2, when the trouble appears in user side pipeline, can handle in a flexible way, do not influence the unit normal operating.
The invention can exert the advantage of soil heat storage, adopts the heat exchanger 2 to isolate the heat source from the heat pump evaporator, and is convenient for the pressure and flow design of the systems at two sides, wherein the heat source side circulating pump intermittently and circularly heats the heat source side medium in the heat source recovery period or a plurality of weeks before the beginning of the heating season, so as to promote the underground deep layer heat source to uniformly heat the medium to about 80 ℃, and then conducts the underground heat to the layers around the upper layer of the heat exchange hole by circulating the heat source side medium for one time, thereby fully storing the heat, achieving the purpose of heat storage and energy storage, and ensuring the heat source supply when continuously outputting heavy load under the extremely cold weather condition.
The two devices are isolated by the heat exchanger 2, so that the operation environment of the unit is pure, the input and output operation flow and temperature of the two devices are set within an allowable range and can be stably operated, the influence of water quality of pipelines at the heat exchange hole side and the user side is avoided, the operation faults of the heat pump unit are greatly reduced, and the safe operation and maintenance of equipment are facilitated.
Further, the high-region heat supply assembly 7 includes a high-region heat exchanger 701 and a high-region warm water pump 702, the middle-region heat supply assembly 8 includes a middle-region heat exchanger 801 and a middle-region warm water pump 802, the low-region heat supply assembly 9 includes a low-region heat exchanger 901 and a low-region warm water pump 902, the heat supply pipelines of the plurality of medium-deep geothermal heat pump units 4 are all connected with the second user warm water pump 402, the heat supply pipeline of the second user warm water pump 402 is connected with the high-region heat exchanger 701 and the high-region warm water pump 702 in sequence in the first path, the second path is connected with the high-region heat exchanger 701 and the high-region warm water pump 702 in sequence in the second path, the third path is connected with the low-region heat exchanger 901 and the low-region warm water pump 902 in sequence in the third path, and the water return pipelines of the high-region warm water pump 702, the middle-region warm water pump 802 and the low-region warm water pump 902 are respectively connected with the plurality of medium-deep geothermal heat pump units 4.
Further, the system also comprises a constant-pressure water supplementing and dirt cleaning assembly 10, wherein the constant-pressure water supplementing assembly 10 is connected with a heat supply pipeline between the heat exchanger 2 and the heat source side 1 and a water return pipeline between the plurality of middle-deep geothermal heat pump units 4 and the heat exchanger 2.
The geothermal hole is a vertical structure with the depth of kilometers, and a thermal medium is taken from the geothermal hole in a heat storage season and is precipitated for a long time, so that more precipitates are formed at the bottom of the geothermal hole, and the cleaning work is needed.
Specifically, the constant pressure water supplementing and decontaminating assembly 10 comprises a first air conditioner side constant pressure water supplementing device 1001, a second air conditioner side constant pressure water supplementing device 1002, a third air conditioner side constant pressure water supplementing device 1003, a soft water tank 1004 and a water softener 1005, the first air conditioner side constant pressure water supplementing device 1001 is connected with water return pipelines of the water collector 6, the high area heat supply component 7, the middle area heat supply component 8 and the low area heat supply component 9, the second air conditioner side constant pressure water supplementing device 1002 is connected with water return pipelines between a plurality of intermediate-deep geothermal heat pump units 4 and the heat exchanger 2, the third air conditioner side constant pressure water replenishing device 1003 is connected with a heat supply pipeline between the heat exchanger 2 and the heat source side 1, the soft water tank 1004 is respectively connected with a first air-conditioning side constant pressure water supplementing device 1001, a second air-conditioning side constant pressure water supplementing device 1002 and a third air-conditioning side constant pressure water supplementing device 1003, and a water softener 1005 is arranged between the soft water tank 1004 and the water source side.
One path of the third air conditioner side constant-pressure water replenishing device 1003 is connected between the heat exchanger 2 and the heat source variable-frequency control water pump 101, a second valve V2 and a seventh valve V7 are sequentially arranged on a pipeline, the other path of the third air conditioner side constant-pressure water replenishing device is connected between the heat source variable-frequency control water pump 101 and the heat source side 1, and a first valve V1 and a fifth valve V5 are sequentially arranged on the pipeline.
A sixth valve V6 and an eighth valve V8 are sequentially arranged on a water return pipeline between the heat exchanger 2 and the heat source side 1, the sixth valve V6 and the eighth valve V8 are connected through a heat supply pipeline between the pipeline heat exchanger 2 and the heat source side 1, a third valve V3 is arranged on the pipeline, a heat exchanger flushing pipeline 201 is arranged between the heat source variable-frequency control water pump 101 and the heat source side 1, a sewage discharge pipeline 102 is arranged between the fifth valve V5 and the heat source side 1, and a sewage discharge valve V4 is arranged on the sewage discharge pipeline 102.
The embodiment of the invention also provides a control method applying the active middle-deep geothermal energy heat exchange station system, which comprises the following steps:
opening all valves of the system, and starting the first user hot water pump 401 or the second user hot water pump 402 to establish user side circulation;
determining the working states of a plurality of intermediate-deep geothermal heat pump units 4 according to the load condition;
and heat is supplied to subareas with similar height of the building through the water separator 5, or heat is supplied to subareas with larger height difference of the building through a high district heat supply assembly 7, a middle district heat supply assembly 8 and a low district heat supply assembly 9.
Further, the control method further includes: before the heating season begins, injecting water into the user side pipeline, the water distributor 5, the water collector 6 and the heat exchanger 2 through the second air conditioner side constant pressure water supplementing device 1002, opening a highest air release valve of the pipeline, and starting the second air conditioner side constant pressure water supplementing device 1002 to supplement water until water flows out from the highest air release valve; after the user side water injection is finished, the pipeline and the heat exchanger 2 on the heat source side 1 are injected with water through the third air conditioner side constant pressure water injection device 1003.
Further, the control method further includes: fully washing the geothermal hole on the heat source side 1; the method specifically comprises the following steps: opening a first valve V1, a third valve V3, a blowdown valve V4, a fifth valve V5 and an eighth valve V8, closing a second valve V2, starting a heat source variable frequency control water pump 101, and observing whether the color of a blowdown pipeline 102 is clear;
when the drainage color of the drainage pipeline 102 changes, fully opening the drainage valve V4, closing the heat source variable frequency control water pump 101, simultaneously opening the second valve V2, closing the first valve V1, forcibly replenishing water into the pipeline through the third air conditioner side constant pressure water replenishing device 1003, and discharging the sewage precipitated in the heat exchange hole through the drainage valve V4;
and observing the drainage of the sewage drainage pipeline 102 again, if the drainage is changed from sewage to clean water, the first valve V1 is opened, the second valve V2 and the sewage drainage valve V4 are closed, and the heat exchange hole on the heat source side 1 is flushed.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. An active medium-deep geothermal energy heat exchange station system is characterized by comprising a heat source side, a heat exchanger, a variable frequency control heat pump, a medium-deep geothermal heat pump unit, a water separator and a water collector, wherein a heat supply pipeline and a water return pipeline on the heat source side are connected with the heat exchanger, a heat source variable frequency control water pump is arranged on the heat supply pipeline connected with the heat exchanger on the heat source side, the heat supply pipeline of the heat exchanger is respectively connected with a plurality of medium-deep geothermal heat pump units through a variable frequency control heat taking pump, the heat supply pipelines of the plurality of medium-deep geothermal heat pump units are respectively connected with the water separator through a first user warm water pump, the heat supply pipeline of the water separator respectively supplies heat to a plurality of areas divided by a small area, the water return pipeline of the small area is connected with the water collector, and the water return pipeline of the water collector is respectively connected with the plurality of medium geothermal heat pump units, and the water return pipelines of the plurality of intermediate-deep geothermal heat pump units are connected with the heat exchanger.
2. The active intermediate-depth geothermal energy heat exchange station system according to claim 1, further comprising a high-zone heat supply assembly, a middle-zone heat supply assembly, and a low-zone heat supply assembly, wherein the heat supply pipelines of the plurality of intermediate-depth geothermal heat pump assemblies are respectively connected with the high-zone heat supply assembly, the middle-zone heat supply assembly, and the low-zone heat supply assembly, and the heat supply pipelines of the high-zone heat supply assembly, the middle-zone heat supply assembly, and the low-zone heat supply assembly respectively supply heat to the corresponding areas of the small area divided according to the height, the middle height, and the low height of the floor.
3. The active intermediate-deep geothermal energy heat exchange station system according to claim 2, wherein the high-region heat supply component comprises a high-region heat exchanger and a high-region warm water pump, the middle-region heat supply component comprises a middle-region heat exchanger and a middle-region warm water pump, the low-region heat supply component comprises a low-region heat exchanger and a low-region warm water pump, the heat supply pipelines of the intermediate-deep geothermal energy heat pump units are all connected with a second user warm water pump, the heat supply pipeline of the second user warm water pump is connected with the high-region heat exchanger and the high-region warm water pump in sequence in a first way, the second pipeline is connected with the high-region heat exchanger and the high-region warm water pump in sequence in a second way, the third pipeline is connected with the low-region heat exchanger and the low-region warm water pump in sequence in a third way, and the return pipelines of the high-region warm water pump, the middle-region warm water pump and the low-region warm water pump are respectively connected with the intermediate-deep geothermal energy heat pump units.
4. The active intermediate-deep geothermal energy heat exchange station system according to claim 3, further comprising a constant pressure water replenishing and decontaminating component connected to a heat supply line between the heat exchanger and the heat source side and a return line between the plurality of intermediate-deep geothermal heat pump units and the heat exchanger.
5. The active intermediate-depth geothermal energy heat-exchange station system of claim 4, the constant-pressure water supplementing and sewage cleaning component comprises a first air conditioner side constant-pressure water supplementing device, a second air conditioner side constant-pressure water supplementing device, a third air conditioner side constant-pressure water supplementing device, a soft water tank and a water softener, the first air conditioner side constant pressure water supplementing device is connected with water return pipelines of the water collector, the high-area heat supply assembly, the middle-area heat supply assembly and the low-area heat supply assembly, the second air-conditioning side constant-pressure water supplementing device is connected with water return pipelines between the plurality of intermediate-deep geothermal heat pump units and the heat exchanger, the third air-conditioning side constant-pressure water supplementing device is connected with a heat supply pipeline between the heat exchanger and the heat source side, the softened water tank is connected with first air conditioner side level pressure moisturizing device, second air conditioner side level pressure moisturizing device, third air conditioner side level pressure moisturizing device respectively, set up the water softener between softened water tank and the water source side.
6. The active type middle-deep geothermal energy heat exchange station system according to claim 5, wherein the third air-conditioning side constant-pressure water supplementing device is connected between the heat exchanger and the heat source variable-frequency control water pump in sequence, a second valve V2 and a seventh valve V7 are arranged on the pipeline, the other pipeline is connected between the heat source variable-frequency control water pump and the heat source side, and a first valve V1 and a fifth valve V5 are arranged on the pipeline in sequence.
7. The active type middle-deep geothermal energy heat exchange station system according to claim 6, wherein a sixth valve V6 and an eighth valve V8 are sequentially arranged on a water return pipeline between the heat exchanger and the heat source side, the sixth valve V6 and the eighth valve V8 are connected through a heat supply pipeline between the pipeline heat exchanger and the heat source side, the pipeline is provided with a third valve V3, a heat exchanger flushing pipeline is arranged between the heat source variable frequency control water pump and the heat source side, a sewage discharge pipeline is arranged between the fifth valve V5 and the heat source side, and the sewage discharge pipeline is provided with a sewage discharge valve V4.
8. A control method applied to the active middle and deep geothermal energy heat exchange station system according to any one of claims 1 to 7, wherein the control method comprises the following steps:
opening all valves of the system, and starting the first user hot water pump or the second user hot water pump to establish user side circulation;
determining the working states of a plurality of intermediate-deep geothermal heat pump units according to the load condition;
and supplying heat to subareas with similar height of the building through the water separator, or supplying heat to subareas with larger height difference of the building through a high district heat supply assembly, a middle district heat supply assembly and a low district heat supply assembly.
9. The method of controlling an active deep geothermal energy heat exchange station system according to claim 8, further comprising: before the heating season begins, injecting water into a user side pipeline, a water separator, a water collector and a heat exchanger through a second air conditioner side constant pressure water supplementing device, opening a highest air release valve of the pipeline, and starting the second air conditioner side constant pressure water supplementing device to supplement water until water flows out of the highest air release valve; and after the water injection of the user side is finished, injecting water into the pipeline and the heat exchanger on the heat source side through the third air conditioner side constant pressure water supplementing device.
10. The active intermediate-deep geothermal energy heat exchange station system of claim 8 or 9, further comprising: fully flushing a geothermal hole on the heat source side; the method specifically comprises the following steps: opening a first valve V1, a third valve V3, a blowdown valve V4, a fifth valve V5 and an eighth valve V8, closing a second valve V2, starting a heat source variable-frequency control water pump, and observing whether the color of a blowdown pipeline is clear;
when the drainage color of the sewage pipeline changes, fully opening the sewage valve V4, closing the heat source variable frequency control water pump, simultaneously opening the second valve V2, closing the first valve V1, forcibly replenishing water into the pipeline through a third air conditioner side constant pressure water replenishing device, and discharging the sewage precipitated in the heat exchange hole through the sewage valve V4;
and observing the drainage of the sewage discharge pipeline again, if the sewage is changed into clear water from the sewage, opening the first valve V1, closing the second valve V2 and the sewage discharge valve V4, and finishing the flushing of the heat exchange hole on the heat source side.
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