CN111595045B - Enhanced Geothermal System (EGS) with cascade utilization - Google Patents
Enhanced Geothermal System (EGS) with cascade utilization Download PDFInfo
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- CN111595045B CN111595045B CN202010461924.7A CN202010461924A CN111595045B CN 111595045 B CN111595045 B CN 111595045B CN 202010461924 A CN202010461924 A CN 202010461924A CN 111595045 B CN111595045 B CN 111595045B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/20—Geothermal collectors using underground water as working fluid; using working fluid injected directly into the ground, e.g. using injection wells and recovery wells
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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
- F24D11/003—Central heating systems using heat accumulated in storage masses water heating system combined with solar 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
- 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
- F24D11/005—Central heating systems using heat accumulated in storage masses water heating system with recuperation of waste heat
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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
- F24D19/1042—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses solar energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/18—Machines or apparatus for drying solid materials or objects with movement which is non-progressive on or in moving dishes, trays, pans, or other mainly-open receptacles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/003—Handling, e.g. loading or unloading arrangements for articles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/08—Parts thereof
- F26B25/12—Walls or sides; Doors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/18—Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
- F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection
- F26B3/286—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection by solar radiation
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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
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The invention relates to the technical field of geothermal systems, in particular to an Enhanced Geothermal System (EGS) which can carry out cascade comprehensive utilization on geothermal heat, improve the utilization rate of the geothermal heat and save energy, and particularly relates to a cascade utilization Enhanced Geothermal System (EGS) which comprises a geothermal heat collecting device, a primary heat exchange device, a primary utilization device, a secondary heat exchange device, a secondary utilization device, a tertiary heat exchange device, a tertiary utilization device, a capillary network system, a temperature control device, a water collecting tank and a geothermal recharging device. The system utilizes geothermal energy as a heat source, and is clean and renewable; the geothermal energy can be comprehensively utilized in a cascade manner, the utilization rate of the geothermal energy is improved, and the energy is saved; a screw pump is arranged in the heat exchange device, so that the heat exchange efficiency is improved; the fruit and vegetable can be fixed by the fixed tray and the movable tray in the bin, and the drying process is accelerated under the driving of the rotary rod. The layered capillary tube net system is arranged in the bin, so that uniform heating and drying of crops are facilitated.
Description
Technical Field
The invention relates to the technical field of geothermal systems, in particular to an Enhanced Geothermal System (EGS) which can comprehensively utilize geothermal energy in a cascade mode, improve the utilization rate of geothermal energy and save energy, and particularly relates to an Enhanced Geothermal System (EGS) utilizing geothermal energy in a cascade mode.
Background
In the season of vegetable harvesting, once the problem of late market or continuous rainy weather occurs, a large amount of vegetables are rotten due to the failure of preservation, and the economic loss is not small for planting farmers. Therefore, farmers can dry and dehydrate the vegetables to prepare dried vegetables for sale. The dehydrated vegetable processed product has low water content, and can effectively inhibit microbial activity and enzyme activity in tissue, thereby prolonging storage life, reducing volume, reducing weight, and facilitating storage and transportation. Typically, fresh vegetables typically have a moisture content of about 70% to about 90%, while dried dehydrated or dried vegetables have a moisture content of about 6% to about 8%.
At present, the method for drying the dehydrated vegetables mainly comprises natural drying and artificial drying. The natural drying is economical and practical, but the food can be eaten in the sky, the drying quality is not guaranteed, the color of the vegetables cannot be guaranteed, and the insects are easy to grow in the later storage. The manual drying technology at the present stage has many problems, the surface layer raw material is usually pasted during drying, the bottom layer is not dried yet, in addition, the energy consumption of the drying machine on the market is usually large, the energy utilization rate is low, the energy conservation and emission reduction are not facilitated, and the drying cost is reduced.
In the harvest season of crops such as wheat, the water content of the harvested wheat seeds is often too high, farmers still use airing in an airing field and airing beside roads as main dehumidification means at present, and the problems of spreading seeds and turning seeds for multiple times in the airing process are extremely labor-consuming. And the sunning of highway can cause the vehicle to block up, causes the traffic hidden danger easily. Even if the grains after being put in storage need to be aired regularly due to natural moisture regain and the like, the grains can be prevented from mildewing, but the problems of site limitation and labor cost still puzzle people.
The heat source matched with grain drying machinery in the current market mainly uses coal and assists fuel oil, biomass and other power forms. The fire coal can cause pollution to the environment; although fuel oil belongs to plot energy, the fuel oil also has pollutant emission of different magnitudes, has higher use cost and has no popularization value.
The grain dryer has limited service time, can be used for dozens of days in busy farming season in one year, and can be idle in other times, so that resource waste is caused, the return on investment is low, and the popularization is difficult.
Crop drying equipment on the market at present often only has the stoving function, and still need transport the storage in the granary after the crops are dried, can inhale the moisture in the air again in the transportation, leads to still appearing the condition of going mouldy and sprouting in the granary. Equipment capable of drying and storing crops is also urgently needed in the market.
Disclosure of Invention
The invention aims at solving one of the technical problems, designs a gradient utilization enhanced geothermal system which is not only suitable for processing and drying various fruits and vegetables in strip shape, sheet shape, block shape and the like, but also suitable for drying materials of traditional Chinese medicinal materials, aquatic products, meat, grains and the like, a secondary utilization device can also heat a community, a third utilization device can heat a swimming pool and a fishpond, the application is very wide, and the local thermal system adopts the technical scheme that: a gradient utilization Enhanced Geothermal System (EGS) comprises a geothermal heat collecting device, a primary heat exchange device, a primary utilization device, a secondary heat exchange device, a secondary utilization device, a tertiary heat exchange device, a tertiary utilization device, a capillary tube network system, a temperature control device, a water collecting tank and a geothermal recharge device; the geothermal energy collecting device is connected with the primary heat exchange device, the primary heat exchange device is connected with the primary heat utilization device, the secondary heat exchange device is connected with the tail end of the primary heat exchange device, the secondary utilization device is connected with the secondary heat exchange device, the tertiary heat exchange device is connected with the tail end of the secondary heat exchange device, the tertiary utilization device is connected with the tertiary heat exchange device, the capillary tube net system is provided with a plurality of capillary tube net systems, each capillary tube net system is respectively positioned in the primary utilization device, the secondary utilization device and the tertiary utilization device, the temperature control device is respectively connected with the primary utilization device, the secondary utilization device and the tertiary utilization device, the water collecting tank is connected with the primary heat exchange device, and the geothermal energy recharging device is connected with the water collecting tank.
Preferably, the geothermal collecting device comprises a water pump unit, a thermal well and a magnetized scale remover; the water pump unit is connected with the heat production well, and the magnetization descaling device is arranged between the water pump unit and the heat production well and communicated with the water pump unit and the heat production well.
Preferably, the first-stage heat exchange device, the second-stage heat exchange device and the third-stage heat exchange device are internally provided with heat exchange tubes and screw pumps; each screw pump is respectively positioned at the middle shaft position of the corresponding heat exchange device, and the heat exchange tubes are densely distributed in parallel at the periphery of the corresponding screw pump.
Preferably, the device is utilized to one-level contains A fruit vegetables stoving storehouse, B fruit vegetables stoving storehouse and C fruit vegetables stoving storehouse, the device is utilized to one-level contains but not limited to above-mentioned three fruit vegetables stoving storehouse, can increase and decrease according to actual demand. The three fruit and vegetable drying bins are arranged in parallel and are respectively connected with the primary heat exchange device.
Preferably, each fruit vegetables stoving storehouse structure is the same, and each fruit vegetables stoving storehouse all contains shell, foldable metal top, toughened glass top, observation window, air inlet valve, fan, feed inlet, discharge gate, temperature sensor, humidity transducer, discharge valve, circulation track, driving motor, drive wheel, rotary rod, fixed tray, portable tray, dead lever, tray cover, liquid collecting plate, fluid-discharge tube, mobile device, storehouse top heat exchanger and heat storage tank.
Preferably, the shell is in a hollow design, the inner side of the shell is attached with a heat insulation layer, and the design of the cavity and the heat insulation layer can reduce heat leakage of the drying bin to the environment; the foldable metal top is positioned at the upper part of the drying bin, and a toughened glass top is arranged on the inner side of the foldable metal top; the observation window is positioned on the side surface of the corresponding drying bin; the air inlet valve is positioned at the lower part of the outer side of the corresponding drying bin, and the fan is positioned at the bottom of the corresponding drying bin; the feeding hole is positioned at the left side of the corresponding drying bin, and the discharging hole is positioned at the right side of the corresponding drying bin; the temperature sensors and the humidity sensors are arranged in a plurality of groups and distributed at the upper, middle and lower positions of the inner side of the corresponding drying bin; the exhaust valve is located at the top of the drying bin and connected with the bin top heat exchanger, and the bin top heat exchanger is connected with the heat storage tank. The driving motor is connected with a driving wheel, and the driving wheel is connected with the circulating track; the rotary rod is connected with a fixed part in the middle of the driving wheel, the fixed tray is connected with the rotary rod, the movable tray is connected with the rotary rod, the fixed rod is connected with the fixed tray, and the tray cover covers the outer sides of the fixed tray and the movable tray; the liquid collecting plate is positioned at the lowest part of the drying bin and is designed in an inverted V shape, and the edge of the liquid collecting plate is connected with a liquid discharge pipe; the moving device (325) is positioned at the bottom end of the drying bin and can move each drying bin to a designated position.
Preferably, the secondary utilization device comprises a district heating system and a grain drying bin; the district heating system and the grain drying bin are designed in parallel and are respectively connected with the secondary heat exchange device; the grain drying bin comprises a shell, a folding metal roof, a toughened glass roof, an observation window, an air inlet valve, a fan, a feeding hole, a discharging hole, a temperature sensor, a humidity sensor, an exhaust valve, a liquid collecting plate, a liquid discharge pipe, a moving device, a bin top heat exchanger and a heat storage tank; the device also comprises a rotating shaft, a rotating arm, a servo motor and a supporting plate.
Preferably, the supporting plate is positioned in the grain drying bin and is in a positive V shape, the drying bin is internally divided into an upper layer, a middle layer and a lower layer, the V-shaped bottom end of the supporting plate is a hollow ring, the rotating shaft penetrates through the middle of the V-shaped bottom end of the supporting plate, and the lower end of the rotating shaft is fixed at the bottom of the drying bin; the rotating arm is connected with the rotating shaft, and the servo motor is connected with the rotating shaft.
Preferably, the three-stage utilization device comprises a fishpond heating system and a swimming pool constant temperature system; the fishpond heating system and the swimming pool constant temperature system are designed in a parallel mode and are respectively connected with the three-stage heat exchange device.
Preferably, capillaries are densely distributed in the capillary tube net system, and the capillaries are densely distributed in the shells of the primary utilization device, the secondary utilization device and the tertiary utilization device and are connected with the primary heat exchange device, the secondary heat exchange device and the tertiary heat exchange device outwards respectively.
Preferably, one end of the temperature control device is connected with the solar heat collecting plate, and the other end of the temperature control device is respectively connected with the primary utilization device, the secondary utilization device and the tertiary utilization device.
Preferably, the water collecting tank comprises a gas-liquid separation device, and the water collecting tank is connected with the primary heat exchange device.
Preferably, the geothermal recharging device comprises a booster pump and a recharging well; the geothermal recharging device is connected with the water collecting tank.
The invention has the beneficial effects that:
1) the geothermal energy is used as a heat source, and the device is clean and renewable.
2) Can carry out cascade comprehensive utilization to the geothermy, improve the utilization ratio of the geothermy and save energy.
3) And a screw pump is arranged in the heat exchange device, so that the heat exchange efficiency is improved.
4) The fruit and vegetable can be fixed by the fixed tray and the movable tray in the bin, and the drying process is accelerated under the driving of the rotary rod.
4) The layered capillary tube net system is arranged in the bin, so that uniform heating and drying of crops are facilitated.
5) The upper part of the bin body is provided with a glass inner wall and a metal outer wall, the metal outer wall can be opened in sunny days, and sunlight penetrates through the glass inner wall to perform secondary energy supplement.
6) Different temperatures can be set according to different crops for drying, such as wheat, soybean, raisin, dried persimmon, hot pepper and the like.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or components are generally identified by like reference numerals. In the drawings, elements or components are not necessarily drawn to scale.
Figure 1 is a schematic workflow diagram of the system.
Fig. 2 is a schematic view of the external structure of the system.
FIG. 3 shows the intention of opening the metal top of the drying bin.
Fig. 4 is a schematic sectional view of a fruit and vegetable drying bin.
Fig. 5 is a schematic sectional view of the grain drying bin.
Fig. 6 is a schematic view of the interior of the fruit and vegetable drying bin.
Fig. 7 is an enlarged schematic view of a tray inside the fruit and vegetable drying bin.
FIG. 8 is a schematic cross-sectional view of a heat exchange device.
In the figure, 1, a geothermal energy collecting device; 101. a water pump unit; 102. a heat recovery well; 103. a magnetized scale remover; 201. a primary heat exchange device; 202. a secondary heat exchange device; 203. a third stage heat exchange device; 204. a bin top heat exchanger; 205. a heat storage tank; 206. a heat exchange pipe; 207. a screw pump; 3. a primary utilization device; 301. a, drying fruits and vegetables in a bin; 302. b, fruit and vegetable drying warehouse; 303. c, fruit and vegetable drying bins; 304. a housing; 305. a folding metal roof; 306. a toughened glass top; 307. an observation window; 308. an air inlet valve; 309. a fan; 310. a feed inlet; 311. a discharge port; 312. a temperature sensor; 313. a humidity sensor; 314. an exhaust valve; 315. circulating the track; 316. a drive motor; 317. a drive wheel; 318. rotating the rod; 319. fixing the tray; 320. a movable tray; 321. fixing the rod; 322. a tray cover; 323. a liquid collecting plate; 324. a liquid discharge pipe; 325. a mobile device; 4. a secondary utilization device; 401. a district heating system; 402. a grain drying bin; 403. a rotating shaft; 404. a rotating arm; 405. a servo motor; 406. a support plate; 5. a third-stage utilization device; 501. a fishpond heating system; 502. a swimming pool constant temperature system; 6. a capillary network system; 601. a capillary tube; 7. a temperature control device; 701. a solar collector panel; 8. a water collection tank; 801. a gas-liquid separation device; 9. a geothermal recharging device; 901. a pressure pump; 902. and (5) recharging the well.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1-8, a cascade utilization Enhanced Geothermal System (EGS) comprises a geothermal energy collecting device, a primary heat exchanging device, a primary utilizing device, a secondary heat exchanging device, a secondary utilizing device, a tertiary heat exchanging device, a tertiary utilizing device, a capillary tube network system, a temperature controlling device, a water collecting tank and a geothermal recharging device; the geothermal energy collecting device is connected with the primary heat exchange device, the primary heat exchange device is connected with the primary heat utilization device, the secondary heat exchange device is connected with the tail end of the primary heat exchange device, the secondary utilization device is connected with the secondary heat exchange device, the tertiary heat exchange device is connected with the tail end of the secondary heat exchange device, the tertiary utilization device is connected with the tertiary heat exchange device, the capillary tube net system is provided with a plurality of capillary tube net systems, each capillary tube net system is respectively positioned in the primary utilization device, the secondary utilization device and the tertiary utilization device, the temperature control device is respectively connected with the primary utilization device, the secondary utilization device and the tertiary utilization device, the water collecting tank is connected with the primary heat exchange device, and the geothermal energy recharging device is connected with the water collecting tank.
Preferably, the geothermal heat collecting device (1) comprises a water pump unit (101), a heat collecting well (102) and a magnetized scale remover (103); the water pump unit (101) is connected with the heat production well (102), and the magnetization descaling device (103) is arranged between the water pump unit (101) and the heat production well (102) and communicated with the water pump unit and the heat production well.
Preferably, the first-stage heat exchange device (201), the second-stage heat exchange device (202) and the third-stage heat exchange device (203) are internally provided with heat exchange tubes (206) and screw pumps (207); each screw pump (207) is respectively positioned at the middle shaft position of the corresponding heat exchange device, and the heat exchange tubes (206) are densely distributed in parallel on the periphery of the corresponding screw pump (207).
Preferably, the first-level utilization device (3) comprises a fruit and vegetable drying bin A (301), a fruit and vegetable drying bin B (302) and a fruit and vegetable drying bin C (303), and the first-level utilization device comprises but is not limited to the three fruit and vegetable drying bins, and can be increased or decreased according to actual requirements. The three fruit and vegetable drying bins are arranged in parallel and are respectively connected with the primary heat exchange device (201).
Preferably, each fruit and vegetable drying bin has the same structure, and comprises a shell (304), a folding metal roof (305), a toughened glass roof (306), an observation window (307), an air inlet valve (308), a fan (309), a feeding hole (310), a discharging hole (311), a temperature sensor (312), a humidity sensor (313), an exhaust valve (314), a circulating track (315), a driving motor (316), a driving wheel (317), a rotating rod (318), a fixed tray (319), a movable tray (320), a fixed rod (321), a tray cover (322), a liquid collecting plate (323), a liquid discharging pipe (324), a moving device (325), a bin roof heat exchanger (204) and a heat storage tank (205).
Preferably, the outer shell (304) is designed in a hollow mode, an insulating layer is attached to the inner side of the outer shell (304), and the design of the cavity and the insulating layer can reduce heat leakage of the drying bin to the environment; the folding metal top (305) is positioned at the upper part of the drying bin, and a toughened glass top (306) is arranged at the inner side of the folding metal top; the observation window (307) is positioned on the side surface of the corresponding drying bin; the air inlet valve (308) is positioned at the lower part of the outer side of the corresponding drying bin, and the fan (309) is positioned at the bottom of the corresponding drying bin; the feeding hole (310) is positioned at the left side of the corresponding drying bin, and the discharging hole (311) is positioned at the right side of the corresponding drying bin; the temperature sensors (312) and the humidity sensors (313) are arranged in a plurality of groups and distributed at the upper, middle and lower positions of the inner side of the corresponding drying bin; the exhaust valve (314) is positioned at the top of the drying bin, the exhaust valve (314) is connected with the bin top heat exchanger (204), and the bin top heat exchanger (204) is connected with the heat storage tank (205). The driving motor (316) is connected with a driving wheel (317), and the driving wheel (317) is connected with the circulating track (315); the rotary rod (318) is connected with the fixed position in the middle of the driving wheel (317), the fixed tray (319) is connected with the rotary rod (318), the movable tray (320) is connected with the rotary rod (318), the fixed rod (321) is connected with the fixed tray (319), and the tray cover (322) covers the outer sides of the fixed tray (319) and the movable tray (320); the liquid collecting plate (323) is positioned at the lowest part of the drying bin, is designed in an inverted V shape, and the edge of the liquid collecting plate is connected with a liquid discharge pipe (324); the moving device (325) is positioned at the bottom end of the drying bin and can move each drying bin to a designated position.
Preferably, the secondary utilization device (4) comprises a district heating system (401) and a grain drying bin (402); the district heating system (401) and the grain drying bin (402) are designed in parallel and are respectively connected with the secondary heat exchange device (202); the grain drying bin (402) comprises a shell (304), a folding metal roof (305), a toughened glass roof (306), an observation window (307), an air inlet valve (308), a fan (309), a feed inlet (310), a discharge outlet (311), a temperature sensor (312), a humidity sensor (313), an exhaust valve (314), a liquid collecting plate (323), a liquid discharge pipe (324), a moving device (325), a bin top heat exchanger (204) and a heat storage tank (205); the device also comprises a rotating shaft (403), a rotating arm (404), a servo motor (405) and a supporting plate (406).
Preferably, the supporting plate (406) is positioned inside the grain drying bin (402) and is in a positive V shape, the drying bin is internally divided into an upper layer, a middle layer and a lower layer, the V-shaped bottom end of the supporting plate (406) is a hollow ring, the rotating shaft (403) penetrates through the middle of the V-shaped bottom end of the supporting plate (406), and the lower end of the rotating shaft is fixed at the bottom of the drying bin; the rotating arm (404) is connected with the rotating shaft (403), and the servo motor (405) is connected with the rotating shaft (403).
Preferably, the three-stage utilization device (5) comprises a fishpond heating system (501) and a pool constant temperature system (502); the fishpond heating system (501) and the swimming pool constant temperature system (502) are designed in a parallel mode and are respectively connected with the three-stage heat exchange device (203).
Preferably, the capillaries (601) are densely distributed in the capillary network system (6), and the capillaries (601) are densely distributed in the shells of the primary utilization device (3), the secondary utilization device (4) and the tertiary utilization device (5) and are connected with the primary heat exchange device (201), the secondary heat exchange device (202) and the tertiary heat exchange device (203) outwards respectively.
Preferably, one end of the temperature control device (7) is connected with the solar heat collecting plate (701), and the other end of the temperature control device is respectively connected with the primary utilization device (3), the secondary utilization device (4) and the tertiary utilization device (5).
Preferably, the water collecting tank (8) comprises a gas-liquid separation device (801), and the water collecting tank (8) is connected with the primary heat exchange device (201).
Preferably, the geothermal recharging device (9) comprises a pressurizing pump (901) and a recharging well (902); the geothermal recharging device (9) is connected with the water collecting tank (8).
The specific working process is as follows:
1. the invention utilizes geothermal energy in a cascade mode and correspondingly utilizes the geothermal energy according to different stage temperatures.
When the geothermal water reaches the ground for the first time, the temperature is about 70-90 ℃, the temperature of the low-temperature water in the first-stage utilization device is about 60-70 ℃ after heat exchange by the first-stage heat exchange device, and heat is circularly supplied in the first-stage utilization device.
The circulated warm water part enters a secondary heat exchange device, the temperature of the secondary utilization device reaches 50-60 ℃ after low-temperature water exchanges heat with the secondary utilization device, and heat is circularly supplied in the secondary utilization device.
And the water in the heat exchange tube enters the three-stage heat exchange device after being continuously cooled, the temperature of the low-temperature water in the three-stage utilization device is about 30-40 ℃ after the low-temperature water is subjected to heat exchange by the three-stage heat exchange device, and the low-temperature water is circularly supplied in the three-stage utilization device.
And after being cooled, the water in the heat exchange tube flows back to the primary heat exchange device for secondary heating.
Geothermal water enters the water collecting tank after passing through the primary heat exchange device, and is injected underground again after gas-liquid separation.
2. The geothermal heat collecting device (1) extracts underground hot water from a heat collecting well (102) through a water pump unit (101), and utilizes a magnetized scaler (103) to perform active treatment on the geothermal water, and the principle is as follows: after water vertically passes through a strong magnetic field at a certain flow rate, under the action of Lorentz magnetic force, water of a macromolecular group is cut into double-molecule water or single-molecule water by the strong magnetic field, water molecules deform and obtain certain energy, the hydrogen bond angle of the water molecules is reduced from 105 degrees to 103 degrees, and water molecules in the microcosmic world generate a series of physical and chemical changes, so that the conductivity, solubility, dissolved oxygen degree, osmotic pressure, polymerization degree of the water and the water action of various ions are changed.
These physical and chemical changes effectively improve the activity of water, and especially greatly enhance the dissolving capacity. Thus, the scaling salts dissolve in water, preventing the precipitation of crystals of calcium and magnesium crystalline material on the heat exchanger surfaces. Meanwhile, in the magnetized water, the calcium and magnesium plasma crystals are also changed, the magnetic field promotes the charged particles in the water to move and change, the adhesion is destroyed, the crystals become fine particles, and loose rice fluid sediments can be discharged through sewage discharge. The geothermal water treated by the magnetization descaler (103) enters a heat exchange tube (206) in a primary heat exchange device (201), exchanges heat with low-temperature water in the heat exchange device, enters a water collecting tank (8), enters a geothermal recharging device (9) through a gas-liquid separation device (801), is pressurized by a pressurizing pump (901), is poured underground through a recharging well (902), replenishes an underground water source again, and is beneficial to cyclic utilization of the geothermal water.
PPS (polyphenylene sulfide engineering plastics) coatings doped with PTFE (polytetrafluoroethylene) are coated on the surfaces of the heat recovery well (102), the recharge well (902), the capillary tube (601) and the like, and are used for preventing the pipeline from scaling. The principle is that the coating isolating oxide and the doped PTFE surface are hydrophilic.
3. A screw pump (207) in the heat exchange device can drive water flow to move forwards, so that the heat exchange efficiency is improved.
The low-temperature water enters the capillary network systems (6) in the drying bins after heat exchange, and the fruits and vegetables are dried through the capillaries (601) densely distributed above the surgery 303 and the fan (309).
4. The primary utilization device (3) is mainly used for drying fruit and vegetable products.
Firstly, agricultural and sideline products to be dried are put into fixed trays (319) in fruit and vegetable drying bins from a feeding hole (310) after corresponding pretreatment procedures, and each fixed tray (319) is divided into three layers from top to bottom and is sequentially fixed on a rotating rod (318).
Equidistant bulges are uniformly arranged on the rotating rod (318), a movable tray (320) is arranged above each fixed tray (319), the contact position of the movable tray (320) and the rotating rod (318) is designed to be elastic, and the movable tray (320) can be clamped on the bulges of the rotating rod (318) and downwards moved to be pressed on the fixed trays (319) fully paved with fruits and vegetables.
The fixing rod (321) is fixed on the fixing tray (319), and passes through the movable tray (320) upwards.
The fixed tray (319) and the movable tray (320) are densely provided with vent holes, and the surfaces of the fixed tray and the movable tray are provided with spiral guide plates, so that air flow is driven to move upwards in the rotating process, and the drying of fruits and vegetables is accelerated.
The tray cover (322) covers the outer sides of the fixed tray (319) and the movable tray (320) to prevent fruits and vegetables from flying out in the rotating process.
5. The circulating track (315) is located inside the fruit and vegetable drying bin, the driving motor (316) drives the driving wheel (317) to rotate periodically along the circulating track (315) to drive each group of trays to sequentially pass through the feeding hole (310) and the discharging hole (311), so that a worker can conveniently place fruits and vegetables into the fruit and vegetable drying bin from the feeding hole (310) and take the dried fruits and vegetables out of the discharging hole (311).
6. External air enters the drying bin from the air inlet valve (308), the fan (309) below drives airflow to flow from bottom to top, hot airflow is formed in the process of flowing through the capillary network system (6), the hot airflow from bottom to top drives evaporated water in crops to move upwards, and the air is discharged from a top exhaust valve (314) of the drying bin.
The hot air flow from the exhaust valve (314) enters the bin top heat exchanger (204), and the heat replaced by the bin top heat exchanger (204) is stored in the heat storage tank (205) and can be supplemented into the temperature control device (7), thereby being beneficial to saving energy.
7. The liquid collecting plate (323) is positioned at the lowest part of the drying bin and is designed in an inverted V shape, the edge of the liquid collecting plate is connected with the liquid discharge pipe (324), and the wet air with larger specific gravity is collected on the liquid collecting plate (323) and condensed into water drops which are discharged out of the bin through the liquid discharge pipe (324).
8. Different drying temperatures can be set for the capillary network system (6) by using the temperature control device (7) according to different dried fruits and vegetables, if asparagus lettuce slices are dried, two-section type drying is carried out, the drying temperature for primary drying is set to be 70-75 ℃, and the drying time is 2 hours; setting the drying temperature of the secondary drying to be 60-65 ℃ and the drying time to be 3 hours; for example, when the bitter gourd slices are dried, the drying temperature is set to be 40-60 ℃, and the drying time is set to be 8 hours.
During the drying process, the drying condition can be observed in real time through an observation window (307) on the side surface of the bin wall.
9. When the sunshine is abundant, the folding metal roof (305) at the upper part can be opened, and the sunshine enters the bin through the toughened glass roof (306) at the inner side, so that the crops can be heated in an auxiliary manner.
10. A moving device (325) is arranged below the drying bin and can drive the drying bin to move to a specified position.
11. Hot water in the primary heat utilization device (3) is circulated and then enters the primary heat exchange device (201) again for heat exchange, and then continues to be circularly heated in the primary heat utilization device (3), and a part of cooled hot water enters a heat exchange pipe (206) of the secondary heat exchange device (202).
The low-temperature water in the secondary utilization device (4) is subjected to heat exchange through the secondary heat exchange device (202) and is respectively used as a heat source of a district heating system (401) and a grain drying bin (402).
The hot water in the secondary utilization device (4) is circulated and then enters the secondary heat exchange device (202) again for heat exchange, and then is continuously circulated and heated in the secondary utilization device (4).
12. Agricultural products to be dried are poured into the grain drying bin (402) from the feeding hole (310), the supporting plates (406) inside the grain drying bin (402) are divided into an upper layer, a middle layer and a lower layer, the layers are sequentially increased from top to bottom, the supporting plates (406) are designed to be dense holes, the lower layer supporting plates are firstly fully paved by the agricultural products, and then the middle layer and the upper layer are sequentially paved.
Rotation axis (403) are located the inside in grain stoving storehouse (402), rotation axis (403) pass in proper order in the middle of the "V" style of calligraphy bottom of layer board (406), the bottom in stoving storehouse is fixed to the lower extreme, be equipped with swinging boom (404) on rotation axis (403), swinging boom (404) insert in the crops, drive rotation axis (403) slow rotation through servo motor (405), drive swinging boom (404) and rotate, can slowly overturn crops, not only make each aspect of crops be heated evenly, but also be unlikely to the rotational speed too fast and lead to the too big powder and the earth that drop of mutual friction between the crops granule, be favorable to improving the purity of hot gas flow, be favorable to the heat recovery of storehouse top heat exchanger (204).
13. The cooled hot water continuously flows into the heat exchange pipes (206) of the three-stage heat exchange device (203), and the low-temperature water in the three-stage utilization device (5) exchanges heat through the three-stage heat exchange device (203) and is respectively used as heat sources of a fishpond heating system (501) and a swimming pool constant-temperature system (502).
And water in the three-stage utilization device (5) circulates through the three-stage heat exchange device (203) to perform circulating heat exchange and heating. The water in the heat exchange pipe (206) flows back to the first-stage heat exchanger after being cooled and is heated again for circulation.
14. The temperature control device (7) is used for adjusting and compensating the temperatures of the primary utilization device (3), the secondary utilization device (4) and the tertiary utilization device (5), the heat source supplement comes from the solar heat collection plate (701) and the heat storage tank (205), and the cold source supplement comes from a cold water pipe (not belonging to the innovation of the device and not shown in the figure) connected with the heat source supplement.
The temperature and the humidity in the bin are monitored and fed back in real time through the temperature sensor (312) and the humidity sensor (313), and the water temperature can be adjusted in time.
The system utilizes geothermal energy as a heat source, and is clean and renewable; can carry out cascade comprehensive utilization to the geothermy, improve the utilization ratio of the geothermy and save energy.
And a screw pump is arranged in the heat exchange device, so that the heat exchange efficiency is improved.
The fruit and vegetable can be fixed by the fixed tray and the movable tray in the bin, and the drying process is accelerated under the driving of the rotary rod. The layered capillary tube net system is arranged in the bin, so that uniform heating and drying of crops are facilitated.
The upper part of the bin body is provided with a glass inner wall and a metal outer wall, the metal outer wall can be opened in sunny days, and sunlight penetrates through the glass inner wall to perform secondary energy supplement.
Different temperatures can be set according to different crops for drying, such as wheat, soybean, raisin, dried persimmon, hot pepper and the like.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention, and the technical solutions are all covered in the scope of the claims and the specification of the present invention; it will be apparent to those skilled in the art that any alternative modifications or variations to the embodiments of the present invention may be made within the scope of the present invention.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (7)
1. A cascade utilization Enhanced Geothermal System (EGS), comprising: the system comprises a geothermal collecting device, a primary heat exchange device, a primary utilization device, a secondary heat exchange device, a secondary utilization device, a tertiary heat exchange device, a tertiary utilization device, a capillary network system, a temperature control device, a water collecting tank and a geothermal recharging device; the geothermal collecting device is connected with the primary heat exchange device, the primary heat exchange device is connected with the primary utilization device, the secondary heat exchange device is connected with the tail end of the primary heat exchange device, the secondary utilization device is connected with the secondary heat exchange device, the tertiary heat exchange device is connected with the tail end of the secondary heat exchange device, the tertiary utilization device is connected with the tertiary heat exchange device, a plurality of capillary tube net systems are arranged, each capillary tube net system is respectively positioned in the primary utilization device, the secondary utilization device and the tertiary utilization device, the temperature control device is respectively connected with the primary utilization device, the secondary utilization device and the tertiary utilization device, the water collecting tank is connected with the primary heat exchange device, and the geothermal recharging device is connected with the water collecting tank;
the first-stage heat exchange device (201), the second-stage heat exchange device (202) and the third-stage heat exchange device (203) are internally provided with heat exchange pipes (206) and screw pumps (207); each screw pump (207) is respectively positioned at the middle shaft position of the corresponding heat exchange device, and the heat exchange tubes (206) are densely distributed in parallel on the periphery of the corresponding screw pump (207);
the primary utilization device (3) comprises a fruit and vegetable drying bin A (301), a fruit and vegetable drying bin B (302) and a fruit and vegetable drying bin C (303), the three fruit and vegetable drying bins are arranged in parallel and are respectively connected with the primary heat exchange device (201);
the capillary tubes (601) are densely distributed in the capillary tube net system (6), and the capillary tubes (601) are densely distributed in the shells of the primary utilization device (3), the secondary utilization device (4) and the tertiary utilization device (5) and are outwards connected with the primary heat exchange device (201), the secondary heat exchange device (202) and the tertiary heat exchange device (203) respectively.
2. The cascaded Enhanced Geothermal System (EGS) according to claim 1, wherein: the geothermal heat collecting device (1) comprises a water pump unit (101), a heat collecting well (102) and a magnetization cleaner (103); the water pump unit (101) is connected with the heat production well (102), and the magnetization descaling device (103) is arranged between the water pump unit (101) and the heat production well (102) and communicated with the water pump unit and the heat production well.
3. The cascaded Enhanced Geothermal System (EGS) according to claim 2, wherein: each fruit and vegetable drying bin has the same structure, each fruit and vegetable drying bin comprises a shell (304), a folding metal top (305), a toughened glass top (306), an observation window (307), an air inlet valve (308), a fan (309), a feeding hole (310), a discharging hole (311), a temperature sensor (312), a humidity sensor (313), an exhaust valve (314), a circulating track (315), a driving motor (316), a driving wheel (317), a rotating rod (318), a fixed tray (319), a movable tray (320), a fixing rod (321), a tray cover (322), a liquid collecting plate (323), a liquid discharging pipe (324), a moving device (325), a bin top heat exchanger (204) and a heat storage tank (205).
4. The cascaded Enhanced Geothermal System (EGS) according to claim 3, wherein: the secondary utilization device (4) comprises a district heating system (401) and a grain drying bin (402); the district heating system (401) and the grain drying bin (402) are designed in parallel and are respectively connected with the secondary heat exchange device (202); the grain drying bin (402) comprises a shell (304), a folding metal roof (305), a toughened glass roof (306), an observation window (307), an air inlet valve (308), a fan (309), a feed inlet (310), a discharge outlet (311), a temperature sensor (312), a humidity sensor (313), an exhaust valve (314), a liquid collecting plate (323), a liquid discharge pipe (324), a moving device (325), a bin top heat exchanger (204) and a heat storage tank (205); the device also comprises a rotating shaft (403), a rotating arm (404), a servo motor (405) and a supporting plate (406).
5. The cascaded Enhanced Geothermal System (EGS) according to claim 4, wherein: the three-stage utilization device (5) comprises a fishpond heating system (501) and a swimming pool constant-temperature system (502); the fishpond heating system (501) and the swimming pool constant temperature system (502) are designed in a parallel mode and are respectively connected with the three-stage heat exchange device (203).
6. The cascaded Enhanced Geothermal System (EGS) according to claim 5, wherein: one end of the temperature control device (7) is connected with the solar heat collecting plate (701), and the other end of the temperature control device is respectively connected with the first-stage utilization device (3), the second-stage utilization device (4) and the third-stage utilization device (5).
7. The cascaded Enhanced Geothermal System (EGS) according to claim 6, wherein: the water collecting tank (8) comprises a gas-liquid separation device (801), and the water collecting tank (8) is connected with the primary heat exchange device (201).
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