Utilize paraffin material to reform transform waste oil well and draw geothermol power's device
阅读说明：本技术 一种利用石蜡材料改造废弃油井提取地热的装置 (Utilize paraffin material to reform transform waste oil well and draw geothermol power's device ) 是由 张姝 李栋 胡宛玉 刘昌宇 高梦 张成俊 于 2020-08-10 设计创作，主要内容包括：一种利用石蜡材料改造废弃油井提取地热的装置,涉及采暖设备技术领域,它包括地上供暖系统和地下取热系统,地下取热系统包括土壤层、油井和双层保温管,土壤层内开设油井,油井内套双层保温管,双层保温管内通过出水通道与地上供暖系统连接,双层保温管侧壁与油井之间的空腔内设有细管束,细管束内通过进水通道与地上供暖系统连接；油井和双层保温管与细管束之间的空隙中自井口向下沿深度方向每隔一定距离以隔板划分若干个封闭夹层,每个封闭夹层依次填充石蜡层一、石蜡层二、石蜡层三、石蜡层四和石蜡层五。本利用石蜡材料改造废弃油井提取地热的装置通过科学地向装置中填充石蜡来提升地热的利用率并满足供热系统的间歇性运行。(A device for transforming a waste oil well to extract geothermal heat by using paraffin materials relates to the technical field of heating equipment and comprises an above-ground heating system and an underground heating system, wherein the underground heating system comprises a soil layer, an oil well and a double-layer heat preservation pipe; a plurality of closed interlayers are divided by partition plates at intervals along the depth direction from a wellhead downwards in gaps between the oil well and the double-layer heat-insulating pipe and the thin pipe bundle, and a paraffin layer I, a paraffin layer II, a paraffin layer III, a paraffin layer IV and a paraffin layer V are sequentially filled in each closed interlayer. According to the device for extracting geothermal heat by reforming the waste oil well by using the paraffin material, the utilization rate of geothermal heat is improved by scientifically filling paraffin into the device, and the intermittent operation of a heating system is met.)
1. The utility model provides an utilize paraffin material to reform transform waste oil well and draw geothermol power's device which characterized in that: the underground heat-collecting system comprises an overground heating system (1) and an underground heat-collecting system (5), wherein the underground heat-collecting system (5) comprises a soil layer (6), an oil well (7) and a double-layer heat-insulating pipe (8), the oil well (7) is arranged in the soil layer (6), the double-layer heat-insulating pipe (8) is sleeved in the oil well (7), a cavity is formed between the outer wall and the bottom of the double-layer heat-insulating pipe (8) and the inner wall of the oil well (7), the double-layer heat-insulating pipe (8) is connected with the overground heating system (1) through a water outlet channel (3), a circulating water pump (4) is installed on the water outlet channel (3), a thin pipe bundle (9) is arranged in the cavity between the side wall of the double-layer heat-insulating pipe (8) and the oil well (7; oil well (7) and double-deck insulating tube (8) and tubule bank (9) between the space in from the well head down along the depth direction at every certain distance divide a plurality of closed intermediate layer with the baffle, every closed intermediate layer is filled paraffin layer one (10), paraffin layer two (11), paraffin layer three (12), paraffin layer four (13) and paraffin layer five (14) in proper order, the melting point diverse of paraffin layer one (10), paraffin layer two (11), paraffin layer three (12), paraffin layer four (13) and paraffin layer five (14).
2. The apparatus for extracting geothermal heat from abandoned oil wells transformed by paraffin material according to claim 1, wherein: the double-layer heat-insulating pipe (8) comprises a heat-insulating pipe outer layer (8-1) and a heat-insulating pipe inner layer (8-2), the heat-insulating pipe inner layer (8-2) is sleeved in the heat-insulating pipe outer layer (8-1), a heat-insulating interlayer is formed between the heat-insulating pipe outer layer (8-1) and the heat-insulating pipe inner layer (8-2), and silica aerogel (16) is filled in the heat-insulating interlayer.
3. The apparatus for extracting geothermal heat from abandoned oil wells transformed by paraffin material according to claim 1, wherein: the number of the thin tube bundles (9) is a plurality, and the thin tube bundles are uniformly distributed in a cavity formed between the double-layer heat preservation tube (8) and the oil well (7).
4. The device for extracting geothermal heat by reforming the abandoned oil well with the paraffin material as claimed in claim 1 or 3, wherein: the outer wall of the thin tube bundle (9) is provided with a plurality of fins (17), and the fins (17) are uniformly distributed on the outer circumferential wall of the thin tube bundle (9).
5. The apparatus for extracting geothermal heat from abandoned oil wells transformed by paraffin material according to claim 1, wherein: the paraffin layer five (14) is blocked at the bottom of the oil well (7).
6. The apparatus for extracting geothermal heat from abandoned oil wells transformed by paraffin material according to claim 1, wherein: the bottom of the double-layer heat-insulating pipe (8) is provided with a filter screen (15).
7. The apparatus for extracting geothermal heat from abandoned oil wells transformed by paraffin material according to claim 1, wherein: and the melting points of the first paraffin layer (10), the second paraffin layer (11), the third paraffin layer (12), the fourth paraffin layer (13) and the fifth paraffin layer (14) are between the temperature of the adjacent soil layer and the temperature of the water flow.
8. The apparatus for extracting geothermal heat from abandoned oil wells transformed by paraffin material according to claim 1, wherein: the thin tube bundle (9) is made of metal materials with large heat conductivity coefficient, such as copper or aluminum, and the like, and metal fins (17) are additionally arranged on the inner surface and the outer surface of the thin tube bundle, and the ratio of the height of the outer side rib to the height of the inner side rib is 2: 1.
9. The apparatus for extracting geothermal heat from abandoned oil wells transformed by paraffin material according to claim 1, wherein: the double-layer heat preservation pipe (8) is a PPR pipe.
The technical field is as follows:
the invention relates to the technical field of heating equipment, in particular to a device for extracting geothermal heat by reforming a waste oil well by using a paraffin material.
Background art:
in recent years, with the increase of oil production, the oil yield of oil wells in a plurality of oil fields is reduced year by year, and the number of scrapped oil wells per year is increased year by year. If the conventional means is adopted to ensure the safety of the abandoned oil well, the cost is high, and the resource waste is caused, and the slight modification of the abandoned oil well of the oil field for the development of geothermal energy becomes the focus of attention of the researchers at present.
The invention content is as follows:
the invention aims to overcome the defects of the prior art and provide the device for extracting the geothermal heat by reforming the waste oil well by using the paraffin material, which improves the utilization rate of the geothermal heat and meets the intermittent operation of a heating system by scientifically filling the paraffin into the device.
The technical scheme adopted by the invention is as follows: a device for extracting geothermal heat by reforming a waste oil well by using paraffin materials comprises an above-ground heating system and an underground heating system, wherein the underground heating system comprises a soil layer, an oil well and a double-layer heat preservation pipe; the oil well and the double-deck insulating tube and the tubule bundle between the space in from the well head down along the depth direction at every certain distance with the baffle divide a plurality of closed intermediate layer, every closed intermediate layer fills paraffin layer one, paraffin layer two, paraffin layer three, paraffin layer four and paraffin layer five in proper order, the melting point diverse of paraffin layer one, paraffin layer two, paraffin layer three, paraffin layer four and paraffin layer five.
The double-layer heat-insulating pipe comprises a heat-insulating pipe outer layer and a heat-insulating pipe inner layer, wherein the heat-insulating pipe inner layer is sleeved in the heat-insulating pipe outer layer, a heat-insulating interlayer is formed between the heat-insulating pipe outer layer and the heat-insulating pipe inner layer, and silica aerogel is filled in the heat-insulating interlayer.
The number of the thin tube bundles is a plurality of the thin tube bundles, and the thin tube bundles are uniformly distributed in a cavity formed between the double-layer heat-insulating tube and the oil well.
The outer wall of the thin tube bundle is provided with a plurality of fins which are uniformly distributed on the outer circumferential wall of the thin tube bundle.
And the paraffin layer five is blocked at the bottom of the oil well.
The bottom of the double-layer heat-insulating pipe is provided with a filter screen.
And the melting points of the first paraffin layer, the second paraffin layer, the third paraffin layer, the fourth paraffin layer and the fifth paraffin layer are between the temperature of the adjacent soil layer and the temperature of the water flow.
The thin tube bundle is made of metal materials with high heat conductivity coefficient, such as copper or aluminum, and metal fins are additionally arranged on the inner surface and the outer surface of the thin tube bundle, and the ratio of the height of the outer side rib to the height of the inner side rib is 2: 1.
The double-layer heat preservation pipe adopts a PPR pipe.
The invention has the following beneficial effects: due to the addition of the paraffin material, the heat storage system can still utilize paraffin for heat storage when no water flows through the system, and when the water flows through the system again, the paraffin is subjected to phase change to quickly release heat to heat water, so that the intermittent operation of the system is met; the paraffin with different melting points is filled in layers by the partition plates at certain intervals along the depth direction underground, so that the utilization rate of geothermal heat can be further improved; metal fins are additionally arranged inside and outside the tube wall of the thin tube, so that the heat exchange effect is greatly enhanced under the condition that the diameter of the thin tube meets the flow requirement; silica aerogel is filled in the inner space of the double-layer heat-insulating pipe, so that the heat-insulating performance is remarkably improved, the heat exchange between inlet water and outlet water is weakened, and the aims of reducing the treatment cost of the waste oil well, providing underground heat energy by utilizing the transformed waste oil well to provide heat supply service for residents or industry, reducing environmental pollution and reducing the consumption of non-renewable energy resources are fulfilled.
Description of the drawings:
FIG. 1 is a front view of the present invention;
fig. 2 is a top view of the present invention.
The specific implementation mode is as follows:
referring to the figures, the device for extracting geothermal heat by reforming the waste oil well by using the paraffin material comprises an overground heating system 1 and an underground heat-taking system 5, wherein the underground heat-taking system 5 comprises a soil layer 6, an
This utilize device that waste oil well was reformed transform to paraffin material and geothermol power is when using, get the heating system including heating system on the ground and underground, heating system sets up on ground, and the underground is got the heating system and is included running through soil horizon, the oil well in the underground to and set up the double-deck insulating tube in the oil well. The bottom of the double-layer heat preservation pipe is a distance away from the bottom of the oil well. The inner space of the double-layer heat-insulating pipe is a water outlet channel, and the outer space of the double-layer heat-insulating pipe is a water inlet channel, and water flowing into the water inlet channel enters the oil well after entering the thin pipe bundle. And arranging a micro tube bundle between the side wall of the oil well and the double-layer heat-insulating pipe, layering the micro tube bundle by using a partition plate at a certain distance from the down direction of the wellhead, and filling paraffin materials with different melting points in gaps among the micro tube bundles in different areas. Cold water is injected between the side wall of the oil well and the double-layer heat-insulating pipe along the thin pipe bundle at the well mouth, the cold water continuously absorbs heat in the soil layer in the flowing process to realize temperature rise, and the heated water at the well bottom is pumped out from the inside of the double-layer heat-insulating pipe by using a circulating water pump, so that the utilization of geothermal heat is realized. Due to the addition of the paraffin material, the heat storage system can still utilize the paraffin for heat storage when no water flows through, when the water flows through again, the paraffin is subjected to phase change to quickly release heat to heat water, and the intermittent operation of the system is met; and the underground is layered by partition boards at certain intervals along the depth direction, and paraffin with different melting points is filled, so that the utilization rate of geothermal heat can be further improved. The method and the device are an economical and practical method and technology for transforming the waste oil well into the geothermal well to provide heat for residents or industry, reduce environmental pollution and reduce non-renewable energy consumption.
The invention plugs the bottom of a waste oil well at a certain depth, wherein a double-layer heat preservation pipe is fixed, a fine pipe bundle is arranged between the side wall of the oil well and the double-layer heat preservation pipe, cold water is injected from the position between the side wall of the oil well and the double-layer heat preservation pipe at a well mouth, the cold water continuously absorbs heat in a soil layer to realize temperature rise when flowing along the fine pipe bundle, and then water heated at the bottom of the well is pumped out from the inside of the double-layer heat preservation pipe by a water pump to be supplied to an overground heating system, so that the utilization of terrestrial heat is realized. When heat is used, the water flow is stopped, and the paraffin can be still used for continuously storing heat; when the water flow passes through the system again, the paraffin is utilized to change phase, heat is released, and the system is rapidly heated, so that the intermittent operation of the system is met. Because the temperature of the underground soil is increased progressively along the depth direction, the invention respectively encapsulates paraffin materials with different melting points by layering the underground soil from the wellhead to the lower part along the depth direction by the partition plate, thereby further improving the utilization rate of geothermal heat. The
In conclusion, the device for extracting geothermal heat by reforming the waste oil well by using the paraffin material can store heat by using the paraffin when no water flows through the device by adding the paraffin material, and the paraffin phase change quickly releases heat to heat water when the water flows through the device again, so that the intermittent operation of the system is met; the paraffin with different melting points is filled in layers by the partition plates at certain intervals along the depth direction underground, so that the utilization rate of geothermal heat can be further improved; metal fins are additionally arranged inside and outside the tube wall of the thin tube, so that the heat exchange effect is greatly enhanced under the condition that the diameter of the thin tube meets the flow requirement; silica aerogel is filled in the inner space of the double-layer heat-insulating pipe, so that the heat-insulating performance is remarkably improved, the heat exchange between inlet water and outlet water is weakened, and the aims of reducing the treatment cost of the waste oil well, providing underground heat energy by utilizing the transformed waste oil well to provide heat supply service for residents or industry, reducing environmental pollution and reducing the consumption of non-renewable energy resources are fulfilled.