CN210740774U

CN210740774U - Closed circulating type heat source system of combined well

Info

Publication number: CN210740774U
Application number: CN201921602795.8U
Authority: CN
Inventors: 陈康生
Original assignee: Jiangsu Lingneng Guanzhu New Energy Technology Co ltd
Current assignee: Jiangsu Lingneng Guanzhu New Energy Technology Co ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-06-12
Anticipated expiration: 2029-09-25

Abstract

The utility model discloses a combined well closed cycle heat source system, including well deep well, directional well, circulating pump, be equipped with suspension sleeve in the well deep well, directional well includes vertical well section and horizontal well section, the circulating pump pours into the well deep well with the circulation medium of heating side from the suspension sleeve of well deep well head into, and circulation medium top-down flows to the shaft bottom after, returns ground from well deep well inner annular space in the suspension sleeve outside again, simultaneously, the circulating pump pours into the directional well into with the circulation medium of heating side from the well head of directional well, the circulation medium flows through in proper order after vertical well section and the horizontal well section, returns ground from well inner annular space in the well deep well in the suspension sleeve outside again. The utility model discloses do not burn, do not draw water, do not consume energy, improved the output of heat source well, and can adjust the output of heat source well according to climate change.

Description

Closed circulating type heat source system of combined well

Technical Field

The utility model relates to a heat source system for heating earth surface buildings and the like by utilizing reproducible heat in strata, in particular to a closed circulation type heat source system with a combined well structure. The utility model is particularly suitable for the heat sources for providing heating and living hot water in centralized residential districts, hotels, large-scale building groups and the like.

Background

The medium and low temperature resources exist in the medium-depth stratum, the renewable heat in the stratum is utilized in a green mode, and a green energy solution is provided for central heating and large building heating.

In order to utilize floor heating technology, the prior method is to drill and develop middle-deep groundwater, and although the technology is provided with a recharge well, the insufficient recharge water amount is inevitable, and the ground settlement risk is formed. In order to solve the problem, the utility model patent with the patent number ZL 201320219708.7 and the name of 'a medium-depth stratum closed circulation heat exchange system' discloses and utilizes the medium-depth stratum closed circulation heat exchange system. The system comprises a heat energy using end, a heat exchanger, a circulating pump, a well hole, a wellhead device, a well cementation casing pipe and a suspension casing pipe, wherein the circulating pump injects water into the well from the annular space from top to bottom to exchange heat with the surrounding well cementation casing pipe, returns to the ground from the interior of the suspension casing pipe after approaching the bottom of the well, and then exchanges the heat to the heat energy using end through the heat exchanger. The utility model discloses a can provide palingenetic, stable, extremely low running cost's heat source. However, the device of the patent has low heat source utilization rate, and the heating capacity of the device is obviously insufficient in the face of the heating demand of centralized residential districts, hotels, large building groups and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem to do not burn, do not draw water, do not consume energy (the ultralow energy consumption of building) as the criterion, possess the green mode of production of universal applicability, provide technical method for realizing the green heating of the popularization nature of building.

The utility model discloses a following technical means:

a closed circulation type heat source system of a combined well comprises a medium-deep well, a directional well and a circulating pump, wherein a suspension sleeve is arranged in the medium-deep well, the directional well comprises a vertical well section and a horizontal well section, the circulating pump injects a circulating medium on a heating side into the medium-deep well from the suspension sleeve at the well head of the medium-deep well, the circulating medium flows to the well bottom from top to bottom and then returns to the ground from an annular space in the medium-deep well outside the suspension sleeve, meanwhile, the circulating pump injects the circulating medium on the heating side into the directional well from the well head of the directional well, and the circulating medium sequentially flows through the vertical well section and the horizontal well section and then returns to the ground from the annular space in the medium-deep well outside the suspension.

Furthermore, the hanging sleeve is connected with a medium-deep well water outlet pipe at a well mouth of the medium-deep well.

Furthermore, the water outlet end of the water outlet pipe of the medium-deep well is connected with a heat exchanger, and heat is transferred to the heating side through the heat exchanger.

Furthermore, the circulating pump comprises a medium-deep well circulating pump and a directional well circulating pump, the reflux medium on the heating side flows back to the hanging sleeve of the medium-deep well through the medium-deep well circulating pump, and meanwhile, the reflux medium on the heating side flows back to the directional well through the directional well circulating pump.

Furthermore, the well bore depth of the medium-deep well can reach 3000 m.

The utility model discloses following beneficial effect has:

1. the utility model discloses can provide the stable and adjustable heat source of building, improve the output of heat source well, and can adjust the output of heat source well according to climate change.

2. The utility model discloses a cold volume or heat in the transport stratum based on use water as the medium. The energy resource which is not burnt and does not pump water and is only carried is green in production, thereby achieving the green life style of heating, cooling and supplying domestic hot water.

3. The utility model discloses a green theory based on zero release, ultralow energy consumption. If the solar power generation is configured to meet the power required by the system equipment, the aim of zero heating energy consumption can be achieved. The national standard of 'near zero energy consumption building technology standard' (GB/T51350-2019) for building heating is realized.

4. The utility model discloses a general suitability is strong. The method is applicable to places where well drilling can be performed, whether in cities or rural areas, mountainous areas or plains. It is especially suitable for centralized residential area, hotel and large building group.

Drawings

Fig. 1 is a schematic diagram of the closed circulation type heat source system of the combined well of the present invention.

The labels in the figure are: 1. a deep well; 2. a vertical well section; 3. a horizontal well section; 4. suspending the casing; 5. a well head device of the medium-deep well; 6. a directional well wellhead assembly; 7. a medium-deep well circulating pump; 8. a directional well circulation pump; 9. a water outlet pipe of the medium-deep well; 10. a heat exchanger; 11. a heating side water return pipe; 12. a heating side intake pipe.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The temperature of the formation increases gradually with depth from the surface to the depth in the crust. Starting from below the constant temperature layer, the formation temperature rises by 3 ℃ on average for every 100 m increase in depth. The utility model discloses on the basis of deep groundwater technique in current well drilling development, combine directional well technique, make up two kinds of well characteristics, create reliable, stable heat source. The medium-deep well and the directional well are combined with a well water circulation loop, so that the renewable stratum energy production rate is improved, the requirement of the thermal load change of a ground building is met, and the energy production cost is reduced.

The principle of the combined well closed circulation type heat source system is shown in figure 1, which comprises a medium-deep well 1, a directional well and a circulating pump. The well head of the medium-deep well is provided with a suspension casing 4, the well head of the medium-deep well is provided with a well head device 5 of the medium-deep well, the directional well comprises a vertical well section 2 and a horizontal well section 3, and the well head of the directional well is provided with a well head device 6 of the directional well. The circulating pump injects a circulating medium (only common water is taken as the circulating medium in the embodiment) at the heating side into the medium-deep well 1 from the hanging casing 4 at the well head of the medium-deep well, the water flows to the well bottom from top to bottom and then returns to the ground from the inner space of the medium-deep well 1 at the outer side of the hanging casing 4, meanwhile, the circulating pump injects the water at the heating side into the directional well from the well head of the directional well, and the water sequentially flows through the vertical well section 2 and the horizontal well section 3 and then returns to the ground from the inner space of the medium-deep well 1 at the outer side of the hanging casing 4.

The hanging sleeve 4 is connected with a middle-deep well water outlet pipe 9 at the well mouth of the middle-deep well 1, the water outlet end of the middle-deep well water outlet pipe 9 is connected with a heat exchanger 10, heat is converted through the heat exchanger 10, and the heat is conveyed to a heating side through a heating side water inlet pipe 11. And water on the heating side is conveyed to the heat exchanger 10 through the heating side water return pipe 11, after heat exchange is carried out through the heat exchanger 10, the water on the heating side flows back to the hanging sleeve 4 of the medium-deep well 1 through the medium-deep well circulating pump 7, and meanwhile, the water on the heating side flows back to the directional well through the directional well circulating pump 8.

The utility model discloses in, the well degree of depth of well deep well can reach 3000 m.

To sum up, the utility model discloses a well deep well circulation heat transfer is converted the heat into the heating side through the heat exchanger, satisfies the conventional heating heat load needs of ground building. When the heat load of the ground building is large, the circulating water heat exchange system of the directional well is started, the stratum heat exchange energy is increased, and the large load requirement is met. The circulating pump of the directional well pumps circulating water with lower temperature to a deeper horizontal well section through a vertical well section of the directional well, and the circulating water continuously exchanges heat with a well wall in the vertical downward flowing process to absorb formation heat. Circulating water flows through the horizontal well section, fully absorbs formation heat, reaches the heating design temperature, and returns to the ground from the annular space of the middle deep well.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined well closed cycle type heat source system is characterized in that: the circulating medium of the heating side is injected into the directional well from the well mouth of the directional well, and flows to the well bottom from top to bottom and then returns to the ground from the annular space in the well of the medium-deep well outside the suspension sleeve.

2. A combination well closed cycle heat source system according to claim 1, wherein: the hanging sleeve is connected with a water outlet pipe of the medium-deep well at the well mouth of the medium-deep well.

3. A combination well closed cycle heat source system according to claim 2, wherein: and the water outlet end of the water outlet pipe of the medium-deep well is connected with a heat exchanger, and heat is converted to a heating side through the heat exchanger.

4. A combination well closed cycle heat source system according to claim 1, wherein: the circulating pump comprises a medium-deep well circulating pump and a directional well circulating pump, wherein a reflux medium on the heating side flows back to the hanging sleeve of the medium-deep well through the medium-deep well circulating pump, and meanwhile, the reflux medium on the heating side flows back to the directional well through the directional well circulating pump.

5. A combination well closed cycle heat source system according to claim 1, wherein: the well bore depth of the medium-deep well can reach 3000 m.