Greenhouse heat supply system capable of efficiently utilizing terrestrial heat

Abstract

The utility model discloses an efficient geothermal utilization greenhouse heat supply system, relates to the technical field of heat supply, and solves the technical problems that when an existing geothermal greenhouse heat supply system is used, geothermal tail water is not fully utilized, and the heat supply effect is difficult to guarantee. The geothermal unit, the peak shaving unit and the heat pump unit are independently connected with the plate heat exchanger, so that the geothermal unit and the peak shaving unit of the plate heat exchanger provide heat, heat supply of the greenhouse is achieved, sufficient and relatively stable heat can be provided, and the overall temperature of the greenhouse is guaranteed; heat in the geothermal tail water can be extracted again through the heat pump unit and utilized again, part of geothermal water is independently stored in the water storage pool and can be heated again under the action of the sun, then part of solar energy is utilized, stable heating can be guaranteed through cooperation of the multiple units, the geothermal tail water is fully utilized, and the energy-saving effect is achieved. The overall structure is simple, and implementation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of greenhouse heating, relates to geothermal technology, and specifically relates to an efficient geothermal utilization greenhouse heating system. BACKGROUND

[0002] Geothermal energy refers to the energy stored in the earth, mainly in the form of heat energy; this energy comes from the processes of radioactive decay, gravity differentiation, tidal friction, etc. in the earth.

[0003] The existing geothermal greenhouse heating generally directly heats by the heat extracted from the geothermal well, or combines geothermal energy and solar energy to mix and heat, so as to guarantee the temperature inside the greenhouse. However, in the above scheme, the geothermal tail water generated is generally directly recharged into the underground, and the temperature carried by the geothermal tail water is not fully utilized. In addition, when the geothermal energy and the solar energy are mixed to heat, there are certain requirements for the use environment, and the relative heating stability is difficult to guarantee.

[0004] Therefore, the utility model provides an efficient geothermal utilization greenhouse heating system. UTILITY MODEL CONTENT

[0005] The utility model aims at solving one of the technical problems in the prior art. To this end, the utility model provides an efficient geothermal utilization greenhouse heating system, which solves the problem that the geothermal tail water is not fully utilized and the heating effect is difficult to guarantee when the existing geothermal greenhouse heating system is used.

[0006] To achieve the above-mentioned purpose, according to the first aspect of the utility model, an efficient geothermal utilization greenhouse heating system is provided, which comprises:

[0007] A geothermal unit, a peak shaving unit, a heat pump unit and a plate heat exchanger, the geothermal unit comprises a geothermal well and a water storage pool, the geothermal well and the water storage pool and the plate heat exchanger are communicated through separate pipelines, and the water storage pool is communicated with the plate heat exchanger;

[0008] The peak shaving unit is communicated with the plate heat exchanger, and the peak shaving unit comprises an independent heat source, and a first control valve is fixedly connected between the independent heat source and the plate heat exchanger.

[0009] The heat pump unit is communicated with the plate heat exchanger.

[0010] Optionally, the water storage pool comprises a heat storage pool and a rainwater pool, the pool wall and the pool bottom of the heat storage pool and the rainwater pool are fixedly provided with an anti-seepage film, and a water level temperature sensor is fixedly connected in the heat storage pool and the rainwater pool.

[0011] Optionally, the surface of the heat storage pool is detachably connected with a heat preservation cover, and the surface of the heat preservation cover is provided with a water inlet and a water outlet.

[0012] Optionally, the water inlet is connected with the geothermal well through a pipeline, and the water outlet is connected with the plate heat exchanger through a pipeline.

[0013] Optionally, the surface of the rainwater pool is detachably connected with a sealing cover, a plurality of guide grooves and communication grooves are formed in the surface of the sealing cover, the communication grooves are connected with the plate heat exchanger through pipelines, and the guide grooves are detachably connected with filter screens.

[0014] Optionally, the cross sections of the guide grooves are all in a conical shape, and the size of the guide grooves away from the rainwater pool is larger than that of the other side.

[0015] Optionally, the peak regulating unit further comprises a plurality of floor heating pipes and a radiator, adjacent floor heating pipes are communicated, and the floor heating pipes are communicated with the radiator and the heat pump unit.

[0016] Optionally, a second control valve is fixedly connected between the radiator and the plate heat exchanger, and a third control valve is fixedly connected between the independent heat source and the radiator.

[0017] Optionally, the heat pump unit comprises a plurality of water source heat pumps, a plurality of circulating pumps and radiation heating pipes, two water source heat pumps form a group, one water source heat pump in a group is communicated with the plate heat exchanger and the floor heating pipe, and the other water source heat pump is communicated with the radiation heating pipe and the circulating pump.

[0018] Optionally, the water supply input ends of the radiation heating pipe and the floor heating pipe are further fixedly connected with a soft water tank, and the water supply input end of the soft water tank is fixedly connected with a water treatment tank.

[0019] Compared with the prior art, the beneficial effects of the utility model are that: through the separate connection of the geothermal unit, the peak regulating unit and the heat pump unit with the plate heat exchanger, the plate heat exchanger can be provided with heat by the geothermal unit and the peak regulating unit, the heating of the greenhouse is realized, sufficient and relatively stable heat can be provided, the overall temperature of the greenhouse is guaranteed, the heat pump unit is connected with the plate heat exchanger, the heat in the geothermal tail water can be extracted again by the heat pump unit, and the heat is utilized again, part of the geothermal water is stored in the water storage pool, under the action of the sun, the part of water can be heated again, part of the solar energy is utilized, stable heating is guaranteed through the cooperation of multiple units, the geothermal tail water is fully utilized, and the overall structure is simple and convenient to implement. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is a structure front view of the utility model;

[0021] Fig. 2 It is a structure front view of the heat storage pool of the utility model;

[0022] Fig. 3 Structure front view of rainwater pool of the utility model.

[0023] In the drawing: 1, plate heat exchanger; 2, geothermal well; 3, heat storage pool; 4, rainwater pool; 5, anti-seepage membrane; 6, water level temperature sensor; 7, heat preservation cover; 8, sealing cover; 9, lead-in groove; 10, first control valve; 11, second control valve; 12, third control valve; 13, water source heat pump; 14, circulating pump; 15, floor heating pipe; 16, radiant heating pipe; 17, radiator. DETAILED DESCRIPTION

[0024] The technical solutions of the utility model will be described clearly and completely below in conjunction with embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] As Figs. 1-3 shown, a high-efficiency geothermal utilization greenhouse heating system, comprising

[0026] geothermal unit, peak shaving unit, heat pump unit and plate heat exchanger 1, the geothermal unit includes geothermal well 2 and water storage pool, and the geothermal well 2 and water storage pool and plate heat exchanger 1 are communicated by separate pipelines respectively, and the water storage pool is communicated with plate heat exchanger 1;

[0027] the peak shaving unit includes independent heat source, and the first control valve 10 is fixedly connected between the independent heat source and plate heat exchanger 1, and the plate heat exchanger 1 is communicated with the heat pump unit;

[0028] It needs to be explained that the independent heat source includes but is not limited to boiler, heat pump; the geothermal unit, peak shaving unit, heat pump unit and plate heat exchanger 1 are electrically connected with automatic control system, and the working principle of the automatic control system is that during heating, according to the water temperature and flow of geothermal well 2 and the demand of heat user, the heating load is divided into two parts of basic load and peak load; the basic load is mainly borne by geothermal energy, and the geothermal water extracted by geothermal exploitation well is heat exchanged with the heating system in the heat exchanger to provide stable heat. The peak load is borne by the peak shaving heat source, when the geothermal heating is insufficient, the peak shaving heat source starts to provide additional heat to meet the demand of heat user;

[0029] The high-efficiency geothermal utilization greenhouse heating system, in the actual application process, through the separate connection of the geothermal unit, the peak regulation unit and the heat pump unit and the plate heat exchanger 1, the plate heat exchanger 1 exists the heat provided by the geothermal unit and the peak regulation unit, realizes the heating of the greenhouse, and further can provide sufficient and relatively stable heat, guarantees the overall temperature of the greenhouse, and the heat pump unit is connected with the plate heat exchanger 1, and further the heat in the geothermal tail water can be extracted again through the heat pump unit, and utilized again, and part of the geothermal water is stored in the water storage pool, and under the action of the sun, the part of the water can be heated again, and further part of the solar energy is utilized, through the cooperation of multiple units, stable heating can be guaranteed, the geothermal tail water is fully utilized, and the overall structure is simple and convenient to implement.

[0030] In some specific embodiments, the water storage pool comprises a heat storage pool 3 and a rainwater pool 4, the pool wall and the pool bottom of the heat storage pool 3 and the rainwater pool 4 are fixedly provided with an anti-seepage film 5, and the heat storage pool 3 and the rainwater pool 4 are fixedly connected with a water level temperature sensor 6; further, the temperature and the water level in the water storage pool can be monitored in real time, and through the anti-seepage film 5, water seepage and corrosion can be prevented, and long-term use of the water storage pool can be ensured.

[0031] It should be noted that the main function of the water level temperature sensor 6 is to send signals when the liquid level or temperature changes. These signals are usually sent to a computer or other control system for monitoring and adjusting when needed.

[0032] In further embodiments, the surface of the heat storage pool 3 is detachably connected with a heat preservation cover 7, the surface of the heat preservation cover 7 is provided with a water inlet and a water outlet, the water inlet is connected with the geothermal well 2 through a pipeline, and the water outlet is connected with the plate heat exchanger 1 through a pipeline; through the heat preservation cover 7, the temperature in the heat storage pool 3 is guaranteed, and heat loss is reduced.

[0033] In further embodiments, the surface of the rainwater pool 4 is detachably connected with a sealing cover 8, the surface of the sealing cover 8 is provided with a plurality of guide grooves 9 and communication grooves, the communication grooves are connected with the plate heat exchanger 1 through a pipeline, the guide grooves 9 are detachably connected with filter screens, the cross sections of the guide grooves 9 are tapered, and the size of the side of the guide groove 9 away from the rainwater pool 4 is greater than the size of the other side; through the design of the guide grooves 9, the water falling into the area of the sealing cover 8 is guided to the same position in the rainwater pool 4, and the filter screens are arranged to prevent sundries from falling into the rainwater pool 4, and the communication of the pipeline is guaranteed.

[0034] In some specific embodiments, the peak-shaving unit further comprises a plurality of floor heating pipes 15 and radiators 17, adjacent ones of the floor heating pipes 15 are in communication, the floor heating pipes 15 are in communication with the radiators 17 and the heat pump unit, the radiators 17 are fixedly connected with the plate heat exchanger 1 through a second control valve 11, and the independent heat source is fixedly connected with the radiators 17 through a third control valve 12; the floor heating pipes 15 are in communication with the radiators 17 and the heat pump unit, so that the floor heating pipes 15 can utilize the geothermal tail water, and the radiators 17 and the independent heat source are connected in parallel, so that the independent heat source heating or the geothermal tail water heating can be flexibly selected, and the flexibility is high;

[0035] In some specific embodiments, the heat pump unit comprises a plurality of water source heat pumps 13, a plurality of circulating pumps 14 and radiation heating pipes 16, two water source heat pumps 13 form a group, one water source heat pump 13 in a single group is in communication with the plate heat exchanger 1 and the floor heating pipes 15, and the other water source heat pump 13 is in communication with the radiation heating pipes 16 and the circulating pumps 14;

[0036] It should be noted that the floor heating pipes 15 and the radiation heating pipes 16 are both buried underground;

[0037] In some specific embodiments, the water supply input end of the radiation heating pipes 16 and the floor heating pipes 15 is further fixedly connected with a soft water tank, the water supply input end of the soft water tank is fixedly connected with a water treatment tank, and the water treatment tank is in communication with tap water; so that the tap water can be used for cooling and replenishment, and the constant temperature is ensured;

[0038] Working principle of the utility model:

[0039] When the independent heat source is not needed to supply heat, the first control valve 10 and the third control valve 12 are closed, the geothermal water, the heat storage pool 3, the rainwater pool 4 and the radiators 17 are in communication with the plate heat exchanger 1, and the geothermal water and the geothermal tail water jointly supply heat;

[0040] When the independent heat source supplies heat, the first control valve 10 and the third control valve 12 are opened, the geothermal water, the heat storage pool 3, the rainwater pool 4, the radiators 17 and the independent heat source are in communication with the plate heat exchanger 1, and the geothermal tail water or the tap water enters the independent heat source, and the geothermal unit, the peak-shaving unit and the heat pump unit jointly supply heat.

[0041] The above examples are only used to illustrate the technical method of the utility model and not to limit it, although the utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical method of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A greenhouse heating system for efficient geothermal utilization, characterized in that, Include: Geothermal unit, peak shaving unit, heat pump unit and plate heat exchanger (1), the geothermal unit includes geothermal well (2) and water storage pool, and the geothermal well (2) and water storage pool and plate heat exchanger (1) are communicated by separate pipes respectively, the water storage pool is communicated with plate heat exchanger (1); Peak shaving unit, the peak shaving unit is communicated with plate heat exchanger (1), and the peak shaving unit includes independent heat source, and first control valve (10) is fixedly connected between the independent heat source and plate heat exchanger (1); Heat pump unit, the heat pump unit is communicated with plate heat exchanger (1).

2. The greenhouse heating system of claim 1, wherein, The water storage pool includes heat storage pool (3) and rainwater pool (4), the pool wall and pool bottom of heat storage pool (3) and rainwater pool (4) are fixedly provided with impermeable membrane (5), and water level temperature sensor (6) is fixedly connected in heat storage pool (3) and rainwater pool (4).

3. The greenhouse heating system of claim 2, wherein, The surface of heat storage pool (3) is detachably connected with heat preservation cover (7), and the surface of heat preservation cover (7) is provided with water inlet and water outlet.

4. The greenhouse heating system of claim 3, wherein, The water inlet is connected with geothermal well (2) through a pipeline, and the water outlet is connected with plate heat exchanger (1) through a pipeline.

5. The greenhouse heating system of claim 2, wherein, The surface of rainwater pool (4) is detachably connected with sealing cover (8), and the surface of sealing cover (8) is provided with a plurality of guide grooves (9) and communication grooves, the communication grooves are connected with plate heat exchanger (1) through a pipeline, and the guide grooves (9) are detachably connected with filter screens.

6. The greenhouse heating system of claim 5, wherein, The cross section of guide groove (9) is tapered, and the size of the side of guide groove (9) away from rainwater pool (4) is greater than that of the other side.

7. The greenhouse heating system of claim 1, wherein, The peak shaving unit further includes a plurality of floor heating pipes (15) and radiators (17), adjacent floor heating pipes (15) are communicated, and the floor heating pipes (15) are communicated with the radiators (17) and the heat pump unit.

8. The greenhouse heating system of claim 7, wherein, The second control valve (11) is fixedly connected between the radiator (17) and the plate heat exchanger (1), and the third control valve (12) is fixedly connected between the independent heat source and the radiator (17).

9. The greenhouse heating system of claim 7, wherein, The heat pump unit includes a plurality of water source heat pumps (13), a plurality of circulating pumps (14) and radiant heating pipes (16), two water source heat pumps (13) form a group, one water source heat pump (13) in a single group is communicated with plate heat exchanger (1) and floor heating pipe (15), and the other water source heat pump (13) is communicated with radiant heating pipe (16) and circulating pump (14).

10. The greenhouse heating system of claim 9, wherein, The water supply input end of radiant heating pipe (16) and floor heating pipe (15) is further fixedly connected with a soft water tank, and the water supply input end of the soft water tank is fixedly connected with a water treatment tank.

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