CN219103380U - Oil field oil gas heat recovery system - Google Patents
Oil field oil gas heat recovery system Download PDFInfo
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- CN219103380U CN219103380U CN202223590730.0U CN202223590730U CN219103380U CN 219103380 U CN219103380 U CN 219103380U CN 202223590730 U CN202223590730 U CN 202223590730U CN 219103380 U CN219103380 U CN 219103380U
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Abstract
The utility model discloses an oil gas heat recovery system of an oil field, and relates to the technical field of heat recovery. The system mainly comprises a heat pump unit and a condensation heat exchanger, wherein the heat pump unit is composed of an evaporation heat exchanger and a heat pump heat exchanger, and a sewage inlet and a sewage outlet are communicated with the evaporation heat exchanger. The utility model can replace the heat in the sewage separated in the oil and gas exploitation process of the oil field, so that the temperature of the oil and gas is raised, the temperature of the sewage is lowered to about 10 ℃, the corrosion to the pipeline in the sewage recharging process is reduced, the lower temperature discharged sewage can reduce the hot corrosion to the pipeline, the service life of the pipeline is greatly prolonged, the corrosion of the pipeline is greatly reduced, and the oil extraction cost is reduced.
Description
Technical Field
The utility model relates to the technical field of heat recovery, in particular to an oil field oil gas heat recovery system.
Background
Heat recovery is to recover waste heat (cold) or waste heat (cold) inside and outside a building, and to use the recovered heat (cold) as a heat source for heating (cold) or other heating devices. The heat recovery unit is mainly used for heating and preheating domestic hot water or hot water of a production process by recovering heat dissipation in a cooling water system, so that waste heat utilization can be realized, and heat pollution of condensation heat to the environment is reduced.
Heat recovery can also be performed for the oil and gas produced in the field. The temperature of the oilfield produced fluid obtained in the oilfield exploitation process is usually high and can reach 180-220 ℃, and a large amount of heat energy is contained in the oilfield produced fluid. The oil field produced liquid is generally separated by a three-phase separator to obtain petroleum, oil field gas, oil field sewage, associated gas and the like.
The separated associated gas cannot be combusted due to the fact that the separated associated gas is mixed with water vapor, so that the associated gas is directly discharged into the air, heat energy and oil gas resources are wasted, and pollution is caused to the air. The oil and gas can be heat recovered to reuse the thermal energy resources.
In the existing heat recovery device, heat exchange is mainly carried out on the oil gas after exploitation, but the heat in the separated water is utilized in a fresh way. The part of water is directly discharged to easily form pollution, so that the water is required to be discharged to the ground (3-5 km below the ground), and the transported pipeline is easy to be thermally corroded at medium and high temperature due to corrosive substances in the water and the ground, so that the service life of the pipeline is shortened, and the production cost is greatly increased.
Disclosure of Invention
The utility model aims at the technical problems and overcomes the defects of the prior art, and provides an oil field oil gas heat recovery system.
In order to solve the technical problems, the utility model provides an oil field oil gas heat recovery system.
The technical effects are as follows: the heat in the sewage after oil gas exploitation and separation in the oil field can be replaced, so that the temperature of the oil gas and the sewage is reduced to about 10 ℃, the corrosion of the sewage and the oil gas to the pipeline is reduced, the lower temperature discharge sewage can reduce the hot corrosion to the pipeline, the service life of the pipeline is greatly prolonged, the corrosion of the pipeline is greatly reduced, and the oil extraction cost is reduced.
The technical scheme of the utility model is as follows: an oil field oil gas heat recovery system comprises a sewage inlet and a sewage outlet, wherein a sewage inlet and a sewage outlet are arranged between
The heat pump unit comprises an evaporation heat exchanger and a heat pump heat exchanger, and the evaporation heat exchanger is communicated with the sewage inlet and the sewage outlet; the medium of the tube side in the heat pump heat exchanger is water, the shell side is communicated with the evaporation heat exchanger, the circulating medium is a refrigerant, and the heat pump heat exchanger is used for cooling sewage in cooperation with the evaporation heat exchanger;
the shell side of the condensing heat exchanger is communicated with the heat pump heat exchanger, and the circulating medium is water after heat exchange; the tube side is communicated with the outside and is used for heating the oil-gas mixture so as to realize oil-gas separation.
Furthermore, the shell side inlet and the shell side outlet of the condensing heat exchanger are both communicated to the outside, and the circulating medium is reflux cold water input from the outside and used for supplying hot water to the outside and refluxing the cold water.
In the oil field oil gas heat recovery system, an expansion valve for adjusting flow and a compressor for pumping refrigerant are arranged between the evaporation heat exchanger and the heat pump heat exchanger.
In the oil field oil gas heat recovery system, a water pump for sending the reflux cold water into the heat pump heat exchanger is arranged between the condensation heat exchanger and the heat pump heat exchanger.
In the oil field oil gas heat recovery system, the shell side outlet of the condensing heat exchanger is communicated with an external heat supply water return pipe and an oil-gas separator, and the shell side inlet of the condensing heat exchanger is communicated with an external heat supply hot water pipe and an external heat supply water pipe for the oil-gas separator.
In the oil field oil gas heat recovery system, the evaporation heat exchanger is arranged outside the heat pump unit, sewage to be cooled is circulated in the tube side of the evaporation heat exchanger, and refrigerant is circulated in the shell side of the evaporation heat exchanger and the tube side of the evaporation heat exchanger.
The beneficial effects of the utility model are as follows:
(1) In the utility model, the temperature of the separated sewage is about 35 ℃, the sewage enters a heat pump system and then exchanges heat with a refrigerant through an evaporation heat exchanger, and the sewage after heat exchange can be discharged to the ground after the temperature of the sewage is about 10 ℃; in the heat pump unit, cooling water and a refrigerant flow through a heat pump heat exchanger, and after the refrigerant exchanges heat in an evaporation heat exchanger, heat is brought into the heat pump heat exchanger to exchange heat with the cooling water; when cooling water enters a heat pump heat exchanger, the temperature is 35 ℃, and after heat exchange, the temperature is raised to 45 ℃; after the cooling water exchanges heat, the oil-water mixed liquid is heated by a condensing heat exchanger, so that multistage heat exchange is completed, heat in the sewage can be transferred to the oil-water mixed liquid, and the heat of the sewage is reduced so as to prolong the service life of a pipeline;
(2) In the utility model, a part of cooling water for heat exchange can be output as heating water and heating water for the oil storage tank, and after the heating and heat storage tank is used up, the water can be reused in the whole system for heat exchange, so that the water resource can be reused, the cost is saved, and the effect of environmental protection is achieved;
(3) In the utility model, the expansion valve is added to control the flow of the refrigerant, and the compressor can provide power for the refrigerant to recycle the refrigerant pump; likewise, the water pump is used for pressurizing the cooling water and pumping the cooling water for use;
(4) According to the utility model, the evaporation heat exchanger and the three-stage booster pump are arranged outside the heat pump unit, so that sewage can be placed in the evaporation heat exchanger for heat exchange, the erosion of the sewage to the whole heat pump system is reduced, and the service life of the heat pump system is prolonged;
(5) According to the utility model, heat in oil gas exploitation process and separated sewage in an oil field can be replaced, so that the temperature of the oil gas and the sewage is reduced to about 10 ℃, corrosion of the sewage and the oil gas to pipelines is reduced, the sewage is discharged at a lower temperature, the hot corrosion to the pipelines is reduced, the service life of the pipelines is greatly prolonged, the corrosion of the pipelines is greatly reduced, and the oil extraction cost is reduced.
Drawings
FIG. 1 is an overall schematic of example 1;
fig. 2 is a schematic diagram after heating the evaporative heat exchanger.
Wherein: 1. an evaporative heat exchanger; 11. a sewage inlet; 12. a sewage outlet; 2. a heat pump heat exchanger; 21. a refrigerant pipe; 22. a cooling water pipe; 3. a condensing heat exchanger; 31. an oil-water mixed liquid inlet; 32. an oil-water mixed liquid outlet; 33. a heating water return port; 34. a water return port of the oil storage tank; 35. a heating hot water outlet; 36. a hot water outlet for the oil storage tank; 4. an evaporative heat exchanger; 5. an expansion valve; 6. a compressor; 7. a water pump; 8. and a third stage booster pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the following detailed description is given with reference to the accompanying drawings and the detailed description. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the utility model, which is therefore not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "mounted" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
The structure of the oil field oil gas heat recovery system provided by the embodiment is shown in fig. 1, and the oil field oil gas heat recovery system mainly comprises a heat pump unit and a condensation heat exchanger 3, wherein the heat pump unit is composed of an evaporation heat exchanger 1 and a heat pump heat exchanger 2, and a sewage inlet 11 and a sewage outlet 12 are communicated with the evaporation heat exchanger 1. The medium of the tube side in the heat pump heat exchanger 2 is water, the shell side of the heat pump heat exchanger 2 is communicated to the evaporation heat exchanger 1 through a refrigerant tube 21, and the circulating medium is a refrigerant and is used for cooling sewage in cooperation with the evaporation heat exchanger 1.
The condensing heat exchanger 3 is communicated with the heat pump heat exchanger 2, the shell side of the condensing heat exchanger 3 is communicated with the heat pump heat exchanger 2 through a cooling water pipe 22, and the circulating medium is water for heat exchange; the tube side is communicated with the oil-water mixed liquid input to the outside through the oil-water mixed liquid tube so as to realize the temperature rise of the oil-water mixed liquid.
In order to maximize heat utilization, both the shell side inlet and outlet of the condensing heat exchanger 3 are connected to the outside, and the flow medium is return cold water input from the outside for supplying hot water to the outside and returning cold water. The shell side outlet of the condensation heat exchanger 3 is communicated with an external heating backwater outlet 33 and an external storage tank backwater outlet 34, and the shell side inlet of the condensation heat exchanger 3 is communicated with an external heating hot water outlet 35 and an external storage tank hot water outlet 36. Therefore, part of cooling water after heat exchange can be used for an oil storage tank and domestic water, and the heat utilization mode is increased.
An expansion valve 5 for adjusting the flow rate and a compressor 6 for pumping refrigerant are arranged between the evaporation heat exchanger 1 and the heat pump heat exchanger 2. And the booster pump can pump the refrigerant, so that the refrigerant forms circulation, and the expansion valve 5 can realize flow adjustment of the refrigerant, thereby ensuring smooth refrigerant circulation.
A water pump 7 for sending the reflux cold water into the heat pump heat exchanger 2 is arranged between the condensation heat exchanger 3 and the heat pump heat exchanger 2. Likewise, the water pump 7 can also boost the pressure of the cooling water so that the cooling water circulates between the condensation heat exchanger 3 and the heat pump heat exchanger 2.
In addition, in order to protect the heat exchanger and reduce corrosion to the heat exchanger in the heat pump unit, the heat pump unit is externally provided with the evaporation heat exchanger 4, sewage to be cooled circulates in the tube side of the evaporation heat exchanger 4, refrigerants circulate in the shell side of the evaporation heat exchanger 4 and the tube side of the evaporation heat exchanger 1, and a water pump 7 is arranged on a pipeline between the evaporation heat exchanger 4 and the evaporation heat exchanger 1.
The specific implementation process comprises the following steps: the temperature of the separated sewage is about 35 ℃, the sewage enters a heat pump system and then exchanges heat with a refrigerant through an evaporation heat exchanger 1, and the temperature of the sewage after heat exchange is about 10 ℃, so that the sewage can be discharged to the ground; in the heat pump unit, cooling water and a refrigerant flow through the heat pump heat exchanger 2, and after the refrigerant exchanges heat in the evaporation heat exchanger 1, heat is brought into the heat pump heat exchanger 2 to exchange heat with the cooling water; when cooling water enters the heat pump heat exchanger 2, the temperature is 35 ℃, and after heat exchange, the temperature is raised to 45 ℃; after the cooling water exchanges heat, the oil-water mixed liquid is heated by the condensing heat exchanger 3, so that multistage heat exchange is completed, heat in sewage can be transferred to the oil-water mixed liquid, and the heat of the sewage is reduced so as to prolong the service life of a pipeline.
In addition to the embodiments described above, other embodiments of the utility model are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the utility model.
Claims (6)
1. An oilfield oil gas heat recovery system, comprising a sewage inlet (11) and a sewage outlet (12), characterized in that: a sewage inlet (11) and a sewage outlet (12) are arranged between
The heat pump unit comprises an evaporation heat exchanger (1) and a heat pump heat exchanger (2), wherein the evaporation heat exchanger (1) is communicated with the sewage inlet (11) and the sewage outlet (12); the medium of a tube side in the heat pump heat exchanger (2) is water, a shell side is communicated with the evaporation heat exchanger (1), and a circulating medium is a refrigerant and is used for cooling by matching with the evaporation heat exchanger (1) for sewage;
the condensing heat exchanger (3) is communicated with the heat pump heat exchanger (2) through a shell side, and the circulating medium is water subjected to heat exchange; the tube side is communicated with the outside and is used for heating the oil-gas mixture so as to realize oil-gas separation.
2. The oilfield oil and gas heat recovery system of claim 1, wherein: the shell side inlet and the shell side outlet of the condensing heat exchanger (3) are communicated to the outside, and the circulating medium is return cold water input from the outside and used for supplying hot water to the outside and returning cold water.
3. The oilfield oil and gas heat recovery system of claim 1, wherein: an expansion valve (5) for adjusting the flow rate and a compressor (6) for compressing the gaseous refrigerant are arranged between the evaporation heat exchanger (1) and the heat pump heat exchanger (2).
4. The oilfield oil and gas heat recovery system of claim 1, wherein: a water pump (7) for sending the reflux cold water into the heat pump heat exchanger (2) is arranged between the condensation heat exchanger (3) and the heat pump heat exchanger (2).
5. The oilfield oil and gas heat recovery system of claim 1, wherein: the shell side outlet of the condensing heat exchanger (3) is communicated with an external heat supply return pipe and a return pipe of the oil-gas separator, and the shell side inlet of the condensing heat exchanger (3) is communicated with an external heat supply hot water pipe and an external heat supply hot water pipe of the oil-gas separator.
6. The oilfield oil and gas heat recovery system of claim 1, wherein: the heat pump unit is provided with an evaporation heat exchanger (1), sewage to be cooled circulates in the shell side of the evaporation heat exchanger (1), and a refrigerant circulates in the tube side of the evaporation heat exchanger (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223590730.0U CN219103380U (en) | 2022-12-29 | 2022-12-29 | Oil field oil gas heat recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223590730.0U CN219103380U (en) | 2022-12-29 | 2022-12-29 | Oil field oil gas heat recovery system |
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| Publication Number | Publication Date |
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| CN219103380U true CN219103380U (en) | 2023-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223590730.0U Active CN219103380U (en) | 2022-12-29 | 2022-12-29 | Oil field oil gas heat recovery system |
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| CN (1) | CN219103380U (en) |
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- 2022-12-29 CN CN202223590730.0U patent/CN219103380U/en active Active
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