Crude oil heating equipment

Abstract

The utility model relates to crude oil heating equipment. The crude oil heating equipment comprises an oil inlet pipeline, a pretreatment device, a heating device and an oil outlet pipeline, the oil inlet pipeline is communicated with the heating device through the pretreatment device; the pretreatment device comprises a gas-liquid separator, a gas pipeline and a liquid pipeline; an oil inlet of the gas-liquid separator is communicated with an oil inlet pipeline and is suitable for injecting crude oil into the gas-liquid separator; a gas outlet and a liquid outlet are formed in the two ends of the gas-liquid separator, the liquid outlet of the gas-liquid separator is communicated with an inlet of the heating device through a liquid pipeline, and an outlet of the heating device is communicated with the oil outlet pipeline; a gas outlet of the gas-liquid separator is communicated with the oil outlet pipeline through a gas pipeline; the heat exchange area of the heat pump heat exchanger is reduced. The gas pipeline is provided with a gas flow meter and a valve, and the gas flow meter and the valve are sequentially arranged in the flowing direction of gas in the gas pipeline; the liquid pipeline is provided with a liquid flow meter and a temperature sensor, and the liquid flow meter and the temperature sensor are sequentially arranged in the flowing direction of liquid in the liquid pipeline.

Description

Technical Field

[0001] The present application relates to the technical field of crude oil processing, and in particular to a crude oil heating device. Background Art

[0002] Oil is the lifeblood of modern industry. Currently, oil mainly refers to crude oil extracted from underground or under the sea. Heavy oil has a high proportion of asphaltene and colloid and a high viscosity, so it accounts for a large proportion of crude oil resources. In the process of heavy oil extraction, crude oil is extracted from oil wells and then transported to crude oil refineries through oil pipelines that can be up to thousands of kilometers long. However, the high viscosity of heavy oil makes it have great resistance during transportation and distribution, resulting in increased friction and increased circulation viscosity of crude oil in the pipeline. One solution is to use the characteristic that the viscosity of heavy oil decreases rapidly with increasing temperature, and set up a relay station on the crude oil distribution pipeline to heat the heavy oil, so that the heavy oil maintains a relatively high temperature during the distribution process, reducing the distribution resistance and energy consumption.

[0003] The existing crude oil heating technology can refer to the crude oil heating and temperature-raising heat pump heat exchanger disclosed in the publication number CN107421120A; oil pipeline, heat exchanger, superconducting heat pipe, heating chamber and heat pump, the oil pipeline is connected to the oil outlet pipe and the oil inlet pipe, the oil outlet pipe is connected to the oil outlet of the heat exchanger, and the oil inlet pipe is connected to the oil inlet of the heat exchanger. However, crude oil often forms gas-liquid two-phases during transportation as pressure and temperature conditions change; the crude oil in this technology directly enters the heat exchanger from the oil inlet pipe, and the heat exchanger needs to heat the gas-liquid two-phase crude oil at the same time, which leads to high energy consumption and low thermal efficiency in the heating method. Summary of the invention

[0004] In view of this, the present application proposes a crude oil heating device.

[0005] According to one aspect of the present application, there is provided a crude oil heating device, characterized in that it comprises: an oil inlet pipeline, a pretreatment device, a heating device and an oil outlet pipeline;

[0006] The oil inlet pipeline is connected to the heating device through the pretreatment device;

[0007] The pretreatment device comprises: a gas-liquid separator, a gas pipeline and a liquid pipeline; the oil inlet of the gas-liquid separator is connected with the oil inlet pipeline, and is suitable for injecting crude oil into the gas-liquid separator; gas outlets and liquid outlets are arranged at both ends of the gas-liquid separator, the liquid outlet of the gas-liquid separator is connected with the inlet of the heating device through the liquid pipeline, and the outlet of the heating device is connected with the oil outlet pipeline; the gas outlet of the gas-liquid separator is connected with the oil outlet pipeline through the gas pipeline;

[0008] The gas pipeline is provided with a gas flow meter and a valve, which are arranged in sequence along the flow direction of the gas in the gas pipeline;

[0009] The liquid pipeline is provided with a liquid flow meter and a temperature sensor, and the liquid flow meter and the temperature sensor are arranged in sequence along the flow direction of the liquid in the liquid pipeline.

[0010] In a possible implementation, the gas pipeline is provided with a pressure sensor;

[0011] The gas flow meter, valve and pressure sensor are arranged in sequence along the flow direction of the gas in the gas pipeline.

[0012] In a possible implementation, the liquid pipeline is provided with an oil-water analyzer;

[0013] The liquid flow meter, the oil-water analyzer and the temperature sensor are arranged in sequence along the flow direction of the liquid in the liquid pipeline.

[0014] In a possible implementation, it further includes: a three-way pipeline;

[0015] The outlet of the heating device, the gas pipeline and the oil outlet pipeline are connected through a three-way pipeline.

[0016] In a possible implementation, the heating device uses an air source CO2 heat pump.

[0017] In a possible implementation, the device further includes: a housing;

[0018] The pre-processing device is arranged inside the cavity of the shell.

[0019] In a possible implementation, it further includes: a base; the heating device and the shell are both arranged on the base.

[0020] Beneficial effect: The crude oil liquid separated by the gas-liquid separator enters the heating device from the liquid pipeline 230 for heating, while the separated gas does not pass through the heating device, but merges with the heated liquid before entering the oil outlet pipeline. While the present application successfully heats the crude oil, it can reduce the heat exchange area of ​​the heat pump heat exchanger, thereby improving the heating efficiency and reducing the cost of the heating equipment.

[0021] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0023] Figure 1 A front view of a crude oil heating device according to an embodiment of the present application is shown;

[0024] Figure 2 A top view of a crude oil heating device according to an embodiment of the present application is shown;

[0025] Figure 3 A front view of a pre-processing device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0026] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0027] Among them, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0030] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0031] Figure 1 A front view of a crude oil heating device according to an embodiment of the present application is shown; Figure 2 A top view of a crude oil heating device according to an embodiment of the present application is shown. Figure 1As shown, the crude oil heating device comprises: an oil inlet pipeline 300, a pretreatment device 200, a heating device 100 and an oil outlet pipeline 700; the oil inlet pipeline 300 is connected to the heating device 100 through the pretreatment device 200; the pretreatment device 200 comprises: a gas-liquid separator 210, a gas pipeline 220 and a liquid pipeline 230; the oil inlet of the gas-liquid separator 210 is connected to the oil inlet pipeline 300, and is suitable for injecting crude oil into the gas-liquid separator 210; gas outlets and liquid outlets are provided at both ends of the gas-liquid separator 210, and the liquid outlet of the gas-liquid separator 210 is connected to the gas-liquid separator 210 through the liquid pipeline 230. The inlet of the heating device 100 is connected, and the outlet of the heating device 100 is connected to the oil outlet pipeline 700; the gas outlet of the gas-liquid separator 210 is connected to the oil outlet pipeline 700 through the gas pipeline 220; the gas pipeline 220 is provided with a gas flow meter 221 and a first valve 223, and the gas flow meter 221 and the first valve 223 are arranged in sequence along the flow direction of the gas in the gas pipeline 220; the liquid pipeline 230 is provided with a liquid flow meter 231 and a temperature sensor 233, and the liquid flow meter 231 and the temperature sensor 233 are arranged in sequence along the flow direction of the liquid in the liquid pipeline 230. The outlet of the heating device 100 is provided with an outlet pipeline 110, and the outlet pipeline 110 of the heating device 100 is connected to the oil outlet pipeline 700; the inlet of the heating device 100 is provided with an inlet pipeline 120, and the inlet pipeline 120 of the heating device 100 is connected to the liquid pipeline 230. Furthermore, the outlet pipeline 110 and the oil outlet pipeline 700 are connected via a flange joint; the inlet pipeline 120 and the liquid pipeline 230 are also connected via a flange joint.

[0032] Here, it should be noted that the pretreatment device 200 and the heating device 100 are combined to pre-treat the crude oil by the pretreatment device 200, and the treated crude oil is heated by the heating device 100. Furthermore, the gas-liquid separator 210 of the pretreatment device 200 separates the gas and liquid of the crude oil and layers them, the gas in the upper layer enters the gas pipeline 220 through the gas outlet, and the liquid in the lower layer enters the liquid pipeline 230 through the liquid outlet; the crude oil liquid separated by the gas-liquid separator 210 enters the heating device 100 from the liquid pipeline 230 for heating, and the separated gas does not pass through the heating device 100, but merges with the heated liquid and then enters the oil outlet pipeline 700. While successfully heating the crude oil, the present application can reduce the heat exchange area of ​​the heat pump heat exchanger to achieve the purpose of improving the heating efficiency, reducing the cost of the heating equipment, and reducing energy consumption and operating costs. At the same time, the instantaneous flow rate of crude oil liquid in the liquid pipeline 230 can be measured by the liquid flow meter 231, and the instantaneous flow rate of crude oil gas in the gas pipeline 220 can be measured by the gas flow meter 221, thereby solving the problem that the oil production cannot be accurately measured in real time at the wellhead of the oil field pumping well.

[0033] In a possible implementation, the gas outlet is opened at the top of the gas-liquid separator 210, the liquid outlet is opened at the bottom of the gas-liquid separator 210, and the oil inlet is opened on the side wall of the gas-liquid separator 210. Figure 3 As shown, one end of the oil inlet pipeline 300 is connected to the oil inlet of the gas-liquid separator 210. A valve can be provided on the oil inlet pipeline 300 to control the start and stop of the injection of crude oil at any time.

[0034] In a possible implementation, the gas pipeline 220 is provided with a gas flow meter 221, such as Figure 3 As shown, the gas inlet end of the gas flow meter 221 is connected to the gas pipeline 220 through a flange joint, and the gas outlet end of the gas flow meter 221 is also connected to the gas pipeline 220 through a flange joint. It should be noted that the gas flow meter 221 is suitable for detecting the instantaneous flow of gas in the gas pipeline 220.

[0035] In a possible implementation, the gas pipeline 220 is provided with a pressure sensor 222, the detection end of the pressure sensor 222 is located inside the cavity of the gas pipeline 220, and is suitable for detecting the gas pressure in the gas pipeline 220 at any time. Further, the gas flow meter 221, the pressure sensor 222, and the first valve 223 are arranged in sequence along the flow direction of the gas in the gas pipeline 220.

[0036] In a possible implementation, the gas pipeline 220 is provided with a first valve 223; Figure 3 As shown, the air inlet end of the first valve 223 is fixedly connected to the gas pipeline 220 through a flange joint, and the air outlet end of the first valve 223 is fixedly connected to the air inlet end of the second valve 224 through a flange joint. It should be noted that the first valve 630 is suitable for regulating the gas flow in the gas pipeline 220. Further, the first valve 223 adopts a ball valve.

[0037] In a possible implementation, the gas pipeline 220 is provided with a second valve 224; Figure 3 As shown, the gas flow meter 221, the pressure sensor 222, the first valve 223 and the second valve 224 are arranged in sequence along the flow direction of the gas in the gas pipeline 220. Furthermore, the second valve 224 is a check valve; it should be noted that since the liquid in the liquid pipeline 230 finally needs to enter the heating device 100 for temperature treatment, in order to prevent the heated liquid from flowing back into the gas pipeline 220, a check valve is set to block the liquid.

[0038] In one possible implementation, the liquid pipeline 230 is provided with a liquid flow meter 231; the water inlet end of the liquid flow meter 231 is connected to the liquid pipeline 230 through a flange joint, and the water outlet end of the liquid flow meter 231 is connected to the liquid pipeline 230 through a flange joint, which is suitable for detecting the liquid pressure in the liquid pipeline 230 at any time.

[0039] In a possible implementation, the liquid pipeline 230 is provided with an oil-water analyzer 232; the liquid flow meter 231, the oil-water analyzer 232 and the temperature sensor 233 are arranged in sequence along the flow direction of the liquid in the liquid pipeline 230. The oil-water analyzer 232 is arranged between the liquid flow meter 231 and the temperature sensor 233, and the detection end of the oil-water analyzer 232 probes into the cavity of the liquid pipeline 230. It should be noted that the water content of crude oil is an important parameter in the oil extraction and petrochemical industries, and is of great significance to the extraction, dehydration, storage, transportation and sales of crude oil and the refining and processing of crude oil. The oil-water analyzer 232 can measure the water content of the crude oil flowing through the liquid pipeline 230.

[0040] In a possible implementation, the liquid pipeline 230 is provided with a temperature sensor 233 ; the detection end of the temperature sensor 233 is located inside the cavity of the liquid pipeline 230 , and is suitable for detecting the temperature of the liquid in the liquid pipeline 230 before heating.

[0041] In a possible implementation, it also includes: a flow totalizer; the data output end of the gas flow meter 221 is electrically connected to the flow totalizer; the data output end of the pressure sensor 222 is electrically connected to the flow totalizer, the data output end of the oil-water analyzer 232 is electrically connected to the flow totalizer, the data output end of the liquid flow meter 231 is electrically connected to the flow totalizer, and the data output end of the temperature sensor 233 is electrically connected to the flow totalizer. It should be noted that the flow totalizer is used in conjunction with the gas flow meter 221, the liquid flow meter 231, the temperature sensor 233, and the pressure sensor 222 to measure, display, accumulate, calculate, alarm, control, transmit, output, collect data, and communicate various parameters of the gas and liquid phases.

[0042] In a possible implementation, it further includes: a three-way pipe 240; the outlet pipe 110 of the heating device 100, the gas pipe 220 and the oil outlet pipe 700 are connected through the three-way pipe 240. Figure 1 and Figure 2 As shown, the first end of the three-way pipe 240 is connected to the outlet pipe 110 of the heating device 100 through a flange joint 250, the second end of the three-way pipe 240 is connected to the gas pipe through a flange joint 260, and the third end of the three-way pipe 240 is connected to the oil outlet pipe 700. Here, it should be noted that Figure 2As shown, in order to ensure that the oil outlet pipeline 700 can smoothly protrude from the shell 500 and make way for the gas-liquid separator 210, the main body of the oil outlet pipeline 700 is a "Z"-shaped tubular structure, one end of the "Z"-shaped tubular structure of the oil outlet pipeline 700 is connected to the third end of the three-way pipeline 240, and the other end of the "Z"-shaped tubular structure of the oil outlet pipeline 700 protrudes from the shell 500.

[0043] In a possible implementation, the heating device 100 uses an air source CO2 heat pump. Further, the heating device 100 uses an air source CO2 heat pump unit (special for oil fields); the nominal heating capacity is 75KW (ambient temperature 7°C). It should be noted that the heating device 100 and the gas-liquid separator 400 of the present application both use existing equipment.

[0044] In a possible implementation, the above flange joints all include: two flanges and two or more fixing bolts, and the two flanges are fixedly connected by the two or more fixing bolts. The two pipes are first fixed to a flange respectively, and then the two flanges are tightened with bolts to make them tightly combined, thereby completing the fixing of the two pipes. This part is the existing technology.

[0045] In a possible implementation, the device further includes: a housing 500; and a pre-processing device 200 disposed inside the cavity of the housing 500. Figure 1 As shown, the main body of the shell 500 is a rectangular structure with one end open, and the open end of the shell 500 is buckled on the side wall of the heating device 100 to facilitate the connection of the liquid pipeline 230, the gas pipeline 220 and the heating device 100. The shell 500 is an inner and outer double-wall structure to improve the isolation effect. The outer side wall of the shell 500 is provided with two through holes, and the oil inlet pipeline 300 and the oil outlet pipeline 700 pass through the shell 500 through the two through holes respectively. It should be noted that the shell 500 is suitable for isolating and protecting the pretreatment device 200 and improving the working stability of the pretreatment device 200.

[0046] In a possible implementation, the device further includes: a base 600; the heating device 100 and the housing 500 are both disposed on the base 600. Figure 1 As shown, the main body of the base 600 is a rectangular plate-shaped structure, and the shell 500 of the pre-treatment device 200 and the heating device 100 are arranged adjacent to the top surface of the base 600 .

[0047] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A crude oil heating device, characterized in that: include: Oil inlet pipeline, pretreatment device, heating device and oil outlet pipeline; The oil inlet pipeline is connected to the heating device through the pretreatment device; The pretreatment device comprises: a gas-liquid separator, a gas pipeline and a liquid pipeline; the oil inlet of the gas-liquid separator is connected to the oil inlet pipeline, and is suitable for injecting crude oil into the gas-liquid separator; gas outlets and liquid outlets are provided at both ends of the gas-liquid separator, the liquid outlet of the gas-liquid separator is connected to the inlet of the heating device through the liquid pipeline, and the outlet of the heating device is connected to the oil outlet pipeline; the gas outlet of the gas-liquid separator is connected to the oil outlet pipeline through the gas pipeline; The gas pipeline is provided with a gas flow meter and a first valve, and the gas flow meter and the first valve are arranged in sequence along the flow direction of the gas in the gas pipeline; The liquid pipeline is provided with a liquid flow meter and a temperature sensor, and the liquid flow meter and the temperature sensor are arranged in sequence along the flow direction of the liquid in the liquid pipeline.

2. The crude oil heating device according to claim 1, characterized in that: The gas pipeline is provided with a pressure sensor; The gas flow meter, the valve and the pressure sensor are arranged in sequence along the flow direction of the gas in the gas pipeline.

3. The crude oil heating device according to claim 1, characterized in that: The liquid pipeline is provided with an oil-water analyzer; The liquid flow meter, the oil-water analyzer and the temperature sensor are arranged in sequence along the flow direction of the liquid in the liquid pipeline.

4. The crude oil heating device according to claim 1, characterized in that: Also includes: Tee pipe; The outlet of the heating device, the gas pipeline and the oil outlet pipeline are connected through the three-way pipeline.

5. The crude oil heating device according to claim 4, characterized in that: The gas pipeline is provided with a second valve; The first valve and the second valve are arranged in sequence along the flow direction of the gas in the gas pipeline.

6. The crude oil heating device according to claim 1, characterized in that: The heating device adopts air source CO 2 Heat pump.

7. The crude oil heating device according to claim 1, characterized in that: Also includes: case; The pre-processing device is arranged inside the cavity of the shell.

8. The crude oil heating device according to claim 7, characterized in that: Also includes: Base; the heating device and the shell are both arranged on the base.

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