Energy-saving electric heating stainless steel reaction kettle for pour point depressant for oil and gas gathering and transportation

Abstract

The utility model belongs to the technical field of reaction kettles, and discloses an energy-saving electric heating stainless steel reaction kettle for a pour point depressant for oil and gas gathering and transportation, which comprises an outer shell, a top cover and an inner shell, the inner shell of the reaction kettle is arranged inside the outer shell of the reaction kettle, the top cover of the reaction kettle is fixed at the top of the outer shell of the reaction kettle, and a heating cavity is formed between the outer shell of the reaction kettle and the inner shell of the reaction kettle. The reaction kettle heating cavity is filled with heat conduction oil, an electric heating plate for heating the heat conduction oil is mounted in the reaction kettle heating cavity, a first stirring mechanism is mounted on the reaction kettle top cover, and a second stirring mechanism is arranged in the reaction kettle heating cavity; the stirring blades are used for stirring heat-conducting oil, so that the heat-conducting oil is promoted to flow circularly, the heat exchange efficiency of the heat-conducting oil and the inner shell is enhanced, the temperature gradient of the heat-conducting oil is reduced, the inner shell is heated more uniformly, and the heat-conducting oil can be heated more uniformly. The problem that a traditional reaction kettle is hot at the lower part and cold at the upper part is solved.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and in particular to an energy-saving electrically heated stainless steel reaction vessel for use as a pour point depressant in oil and gas gathering and transportation. Background Technology

[0002] During oil extraction and transportation, when the temperature of crude oil falls below its wax precipitation point, the paraffin dissolved in the crude oil crystallizes and gradually forms a three-dimensional network structure. This leads to a sharp increase in crude oil viscosity, decreased fluidity, and even pipeline blockage. Pour point depressants, as important chemical additives, inhibit the formation of a three-dimensional network structure by altering the size and morphology of wax crystals (rather than through chemical reaction), thereby significantly lowering the pour point of crude oil and improving its low-temperature fluidity.

[0003] The molecular structure of pour point depressants typically includes polar groups (such as ester, carboxyl, or aromatic nuclei) and long-chain alkyl groups similar to those in paraffin hydrocarbons. The polar groups adhere to the surface of the wax crystals through adsorption, while the long-chain alkyl groups intertwine with the alkane molecules in the wax crystals, hindering further growth and aggregation of the wax crystals, thus refining the wax crystals and dispersing them uniformly in the crude oil.

[0004] In the production and preparation of pour point depressants, a reaction vessel is required for stirring and mixing.

[0005] For example, Chinese utility model patent CN210410662U discloses a uniformly heated reaction vessel, including a reaction vessel body and a base. The lower sidewall of the reaction vessel body is corrugated, and a heating cavity is formed between the lower sidewalls of the reaction vessel body. A heating wire is provided in the heating cavity, and the heating wire is spiral. The heating cavity is also filled with a heat-conducting layer.

[0006] The aforementioned reactor uses an electric heating wire combined with a heat-conducting layer of silica powder to heat the bottom of the reactor. However, in actual use, it can only heat the bottom of the reactor uniformly, while the sides of the reactor are far from the heating wire and therefore do not receive adequate heating. This heating method can cause the material inside the reactor to stratify into "hot at the bottom and cold at the top". Especially when processing high-viscosity pour point depressant raw materials, it is easy to cause problems such as material sticking to the wall and inconsistent reaction rates due to insufficient side wall temperature, which affects the mixing uniformity of the pour point depressant components and the stability of product quality.

[0007] Therefore, we propose an energy-saving electrically heated stainless steel reactor for use as a pour point depressant in oil and gas gathering and transportation. Utility Model Content

[0008] The purpose of this invention is to provide an energy-saving electrically heated stainless steel reactor for use as a pour point depressant in oil and gas gathering and transportation, thereby solving or at least alleviating one or more of the above-mentioned problems and other issues existing in the prior art.

[0009] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0010] An energy-saving electrically heated stainless steel reactor for use as a pour point depressant in oil and gas gathering and transportation includes an outer shell, a top cover, and an inner shell. The inner shell is disposed inside the outer shell. The top cover is fixed to the top of the outer shell by bolts and has a feed inlet. A heating chamber is formed between the outer shell and the inner shell. A discharge pipe is connected to the bottom of the inner shell, and the lower end of the discharge pipe passes through the bottom of the outer shell in a sealed manner. The heating chamber is filled with heat transfer oil, and an electric heating plate for heating the heat transfer oil is installed inside the heating chamber. A first stirring mechanism for stirring the inside of the inner shell is installed on the top cover, and a second stirring mechanism for stirring the heat transfer oil inside the heating chamber is disposed inside the heating chamber. The first stirring mechanism is connected to the second stirring mechanism via a magnetic coupler.

[0011] According to the present invention, an energy-saving electrically heated stainless steel reactor for oil and gas gathering and transportation pour point depressant is provided, wherein the first stirring mechanism includes a motor and a stirring shaft. The motor is fixedly installed on the top cover, and the output end of the motor is fixedly connected to the stirring shaft. The stirring shaft passes through the top cover and extends into the interior of the inner shell, and several stirring rods are fixed on the stirring shaft.

[0012] In an energy-saving electrically heated stainless steel reactor for oil and gas gathering and transportation pour point depressant according to the present invention, the second stirring mechanism includes an isolation sleeve formed at the bottom of the inner shell, and a rotating shaft is rotatably connected inside the isolation sleeve via a bearing, with stirring blades fixedly installed at the lower end of the rotating shaft.

[0013] In an energy-saving electrically heated stainless steel reactor for use as a pour point depressant in oil and gas gathering and transportation according to the present invention, the magnetic coupler includes an upper samarium cobalt magnetic ring and a lower samarium cobalt magnetic ring. The upper samarium cobalt magnetic ring is fixed to the bottom of the stirring shaft, and the lower samarium cobalt magnetic ring is fixed to the upper end of the rotating shaft.

[0014] In an energy-saving electrically heated stainless steel reactor for oil and gas gathering and transportation using pour point depressant according to the present invention, a scraper is fixedly installed at the bottom of the stirring shaft, and the scraper slides in contact with the inner bottom of the inner shell.

[0015] In an energy-saving electrically heated stainless steel reactor for oil and gas gathering and transportation using pour point depressants according to the present invention, a lifting ring is fixedly installed on the top of the top cover.

[0016] In an energy-saving electrically heated stainless steel reactor for use as a pour point depressant in oil and gas gathering and transportation according to the present invention, a temperature sensor is installed inside the heating chamber, the temperature sensor is electrically connected to a controller, and the electric heating plate and the motor are both controlled by the controller.

[0017] According to the present invention, an energy-saving electrically heated stainless steel reactor for oil and gas gathering and transportation using pour point depressant is provided, wherein a plurality of connecting lugs are fixedly installed on the outer wall of the outer shell, a support leg is fixedly installed at the bottom of the connecting lugs, and the controller is fixedly installed on one of the support legs.

[0018] This utility model has at least the following beneficial effects:

[0019] The electric heating plate in the heating chamber heats the heat transfer oil, which in turn transfers heat to the inner shell as a heat medium, avoiding direct contact between the electric heating plate and the material. At the same time, the stirring blades of the second stirring mechanism stir the heat transfer oil, promoting its circulation and enhancing its heat exchange efficiency with the inner shell. This reduces the temperature gradient of the heat transfer oil, making the inner shell more evenly heated and solving the problem of "hot at the bottom and cold at the top" in traditional reactors.

[0020] The temperature sensor installed inside the heating chamber is electrically connected to the controller. The controller automatically adjusts the power of the electric heating plate according to the preset temperature threshold, achieving energy saving while ensuring temperature stability, thus reducing energy consumption compared to traditional reactors.

[0021] The stirring rod of the first stirring mechanism stirs the pour point depressant raw material in the inner shell to ensure uniform mixing of materials. At the same time, the first stirring mechanism drives the second stirring mechanism through a magnetic coupler to synchronously stir the heat transfer oil in the heating chamber, enhance the heat transfer efficiency of the heat transfer oil, and realize bidirectional convection enhancement of "material stirring + heat medium stirring", which improves the uniformity of material mixing and reaction efficiency. Moreover, the use of a single motor for driving further reduces energy consumption. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a front view structural diagram of the present invention;

[0024] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 3 for Figure 2 A magnified structural diagram of part A in the diagram.

[0026] Explanation of icon numbers:

[0027] 1. Outer shell; 101. Connecting ear; 102. Support leg; 103. Controller; 2. Top cover; 201. Feed inlet; 202. Lifting ring; 3. Motor; 4. Stirring shaft; 401. Scraper; 402. Stirring rod; 5. Inner shell; 501. Discharge pipe; 6. Heating chamber; 7. Electric heating plate; 8. Upper samarium cobalt magnetic ring; 9. Isolation sleeve; 901. Bearing; 10. Rotating shaft; 11. Lower samarium cobalt magnetic ring; 12. Stirring blade; 13. Temperature sensor. Detailed Implementation

[0028] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0029] Please refer to Figures 1 to 3 As shown, an embodiment of this utility model provides an energy-saving electrically heated stainless steel reactor for use as a pour point depressant in oil and gas gathering and transportation. It includes an outer shell 1, a top cover 2, and an inner shell 5. The inner shell 5 is disposed inside the outer shell 1. The top cover 2 is fixed to the top of the outer shell 1 by bolts. An inlet 201 is connected to the top cover 2. A heating chamber 6 is formed between the outer shell 1 and the inner shell 5. A discharge pipe 501 is connected to the bottom of the inner shell 5. The lower end of the discharge pipe 501 passes through the bottom of the outer shell 1 in a sealed manner. The heating chamber 6 is filled with heat-conducting oil. An electric heating plate 7 for heating the heat-conducting oil is installed inside the heating chamber 6. A first stirring mechanism for stirring the inside of the inner shell 5 is installed on the top cover 2. A second stirring mechanism for stirring the heat-conducting oil inside the heating chamber 6 is provided inside the heating chamber 6. The first stirring mechanism is connected to the second stirring mechanism via a magnetic coupler.

[0030] When in use, the raw materials for preparing the pour point depressant for oil and gas gathering and transportation are fed into the inner shell 5 through the feed inlet 201. The electric heating plate 7 heats the heat transfer oil in the heating chamber 6, and the heat transfer oil transfers heat to the inner shell 5 to heat the material.

[0031] The first stirring mechanism drives the second stirring mechanism through a magnetic coupler, so that the material in the inner shell 5 and the heat transfer oil in the heating chamber 6 are stirred synchronously. The former ensures that the material is mixed evenly, while the latter enhances the heat transfer efficiency of the heat transfer oil, so that the heat transfer oil can heat the outer wall of the inner shell 5 evenly in all directions.

[0032] During discharge, the material is discharged through the discharge pipe 501 at the bottom of the inner shell 5. The sealing structure between the outer shell 1 and the inner shell 5 prevents heat loss and material leakage.

[0033] Specifically, in this embodiment, the first stirring mechanism includes a motor 3 and a stirring shaft 4. The motor 3 is fixedly installed on the top cover 2, and the output end of the motor 3 is fixedly connected to the stirring shaft 4. The stirring shaft 4 passes through the top cover 2 and extends into the interior of the inner shell 5. Several stirring rods 402 are fixed on the stirring shaft 4.

[0034] When in use, the motor 3 starts and drives the stirring shaft 4 to rotate. Since the stirring shaft 4 and the top cover 2 are connected by bearings, the stirring rod 402 stirs the pour point depressant raw material in the inner shell 5.

[0035] In this embodiment, a scraper 401 is fixedly installed at the bottom of the stirring shaft 4, and the scraper 401 slides in contact with the bottom of the inner shell 5.

[0036] When the scraper 401 rotates with the stirring shaft 4, it slides close to the bottom of the inner shell 5, scraping up the high-viscosity material that has settled or stuck to the bottom of the inner shell 5, ensuring that the material is mixed evenly, which is especially suitable for components that are easy to settle in the preparation of pour point depressants.

[0037] Specifically, in this embodiment, the second stirring mechanism includes an isolation sleeve 9, which is formed at the bottom of the inner shell 5. The interior of the isolation sleeve 9 is rotatably connected to a rotating shaft 10 via a bearing 901, and a stirring blade 12 is fixedly installed at the lower end of the rotating shaft 10.

[0038] The rotating shaft 10 rotates freely in the isolation sleeve 9 via the bearing 901. When the magnetic coupler drives the rotating shaft 10 to rotate, the stirring blade 12 stirs the heat transfer oil in the heating chamber 6, which promotes the circulation of the heat transfer oil, enhances its heat exchange efficiency with the inner shell 5, makes the inner shell 5 more uniformly heated, and reduces the temperature gradient of the heat transfer oil.

[0039] Specifically, in this embodiment, the magnetic coupler includes an upper samarium cobalt magnetic ring 8 and a lower samarium cobalt magnetic ring 11. The upper samarium cobalt magnetic ring 8 is fixed to the bottom of the stirring shaft 4, and the lower samarium cobalt magnetic ring 11 is fixed to the upper end of the rotating shaft 10. The magnetic poles of the upper samarium cobalt magnetic ring 8 and the lower samarium cobalt magnetic ring 11 are arranged in a Halbach array, and the inner shell 5 is an austenitic stainless steel shell.

[0040] During operation, when the stirring shaft 4 rotates, it drives the upper samarium cobalt magnetic ring 8 to rotate. Its magnetic field is coupled to the lower samarium cobalt magnetic ring 11 through the austenitic stainless steel inner shell 5 (non-magnetic), driving the rotating shaft 10 and the stirring blade 12 to rotate synchronously, realizing non-contact transmission and avoiding mechanical seal leakage.

[0041] The Halbach array arrangement of magnetic poles can enhance the magnetic field strength on one side, reduce magnetic leakage, and improve the transmission efficiency to over 95%. At the same time, the stainless steel material of the inner shell 5 ensures that the magnetic field can effectively penetrate without affecting the magnetic coupling effect.

[0042] The Curie temperature of the samarium cobalt magnetic ring can reach 700-800℃. Within the working temperature range of the heat transfer oil in the heating chamber 6 (such as 120-200℃ during the pour point depressant synthesis stage), the magnetic ring will not demagnetize due to high temperature, ensuring long-term stable transmission of the magnetic coupler.

[0043] In this embodiment, a lifting ring 202 is fixedly installed on the top of the top cover 2.

[0044] The lifting ring 202 is used to lift the top cover 2, which facilitates lifting operations during equipment installation, maintenance or component replacement, improves operational convenience, and ensures the safety of disassembly and installation of the top cover 2.

[0045] In this embodiment, a temperature sensor 13 is installed inside the heating chamber 6. The temperature sensor 13 is electrically connected to the controller 103. The electric heating plate 7 and the motor 3 are both controlled by the controller 103.

[0046] Temperature sensor 13 monitors the temperature of the heat transfer oil in heating chamber 6 in real time and transmits the data to controller 103. Controller 103 automatically adjusts the power of electric heating plate 7 according to preset temperature threshold to ensure temperature stability and energy saving effect in the preparation process of pour point depressant.

[0047] In this embodiment, a plurality of connecting ears 101 are fixedly installed on the outer wall of the outer shell 1, and a support leg 102 is fixedly installed on the bottom of the connecting ear 101. The controller 103 is fixedly installed on one of the support legs 102.

[0048] The connecting ear 101 and the support leg 102 form the equipment support structure, ensuring that the reactor is stably installed on the ground or platform; the controller 103 is integrated on the support leg 102, which makes it easy for operators to operate the equipment at close range, while saving space and making the equipment layout more compact.

[0049] In this embodiment, the controller 103 is a Siemens S7-300 series PLC controller, and the temperature sensor 13 is a high-precision temperature sensor with model number PixsysBOX-PT100B-6X300-MGO-0000-DIN / B.

[0050] Refer to the instruction manual. Figures 1 to 3 The implementation principle of this utility model is described as follows:

[0051] Base oil, surfactants, and other pour point depressant raw materials are added to the inner shell 5 through the feed inlet 201 of the top cover 2, with the amount of material added not exceeding 80% of the volume of the inner shell 5. The heating chamber 6 is filled with heat transfer oil, and the electric heating plate 7 is started. The target temperature of the heat transfer oil is set by the controller 103 (e.g., 20-25℃ in the compounding stage, 120-200℃ in the synthesis stage). The temperature sensor 13 monitors the temperature of the heat transfer oil in real time, and the controller 103 automatically adjusts the power of the electric heating plate 7 to raise the temperature of the heat transfer oil to the target value at a rate of 2-5℃ / min, ensuring that the material in the inner shell 5 is preheated evenly. Then, the motor 3 is started, driving the stirring shaft 4 to rotate at a speed of 50-300 rpm. The stirring rod 402 shears and disperses the material in the inner shell 5. The bottom scraper 401 simultaneously scrapes off the material adhering to the bottom wall of the inner shell 5 to prevent deposition. The samarium cobalt magnetic ring 8 moves with the stirring shaft. 4. The rotation of the Halbach array magnetic field coupled to the samarium cobalt magnetic ring 11 drives the rotating shaft 10 and stirring blades 12 to stir the heat transfer oil in the heating chamber 6 at 40-240 rpm (speed ratio 1:0.8) to enhance heat transfer. When the temperature sensor 13 detects that the temperature of the heat transfer oil exceeds the set value of 5℃, the controller 103 automatically reduces the power of the electric heating plate 7. If the temperature difference is <2℃, the heating power is kept constant. After confirming that the depressant reaction is complete, the electric heating plate 7 is turned off, and the motor 3 runs at low speed of 50 rpm for 3-5 minutes to make the material gather at the bottom of the inner shell 5. The discharge pipe 501 valve is opened to discharge the material. After the discharge is completed, a cleaning medium such as ethanol is injected through the feed port 201, and stirring is started to clean the inner shell 5. At the same time, the electric heating plate 7 is heated to 60℃ to assist in cleaning and prevent material residue and deterioration.

[0052] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the present invention's conception through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. An energy-saving electric heating stainless steel reaction kettle for oil and gas gathering and transportation pour point depressant, characterized in that, The reactor for preparing a pour point depressant for oil and gas gathering and transportation includes an outer shell (1), a top cover (2), and an inner shell (5). The inner shell (5) is located inside the outer shell (1). The top cover (2) is fixed to the top of the outer shell (1) by bolts. The top cover (2) is connected to a feed inlet (201). A heating chamber (6) is formed between the outer shell (1) and the inner shell (5). The bottom of the inner shell (5) is connected to a discharge pipe (501). The lower end of the discharge pipe (501) passes through the bottom of the outer shell (1) in a sealed manner. The heating chamber (6) is filled with heat transfer oil. An electric heating plate (7) for heating the heat transfer oil is installed inside the heating chamber (6). A first stirring mechanism for stirring the inside of the inner shell (5) is installed on the top cover (2). A second stirring mechanism for stirring the heat transfer oil inside the heating chamber (6) is provided inside the heating chamber (6). The first stirring mechanism is connected to the second stirring mechanism through a magnetic coupler.

2. The energy-saving electric heating stainless steel reaction kettle for pour point depressant for oil and gas gathering and transportation according to claim 1, characterized in that: The first stirring mechanism includes a motor (3) and a stirring shaft (4). The motor (3) is fixedly installed on the top cover (2). The output end of the motor (3) is fixedly connected to the stirring shaft (4). The stirring shaft (4) passes through the top cover (2) and extends into the interior of the inner shell (5). Several stirring rods (402) are fixed on the stirring shaft (4).

3. The energy-saving electrically heated stainless steel reactor for use as a pour point depressant in oil and gas gathering and transportation according to claim 2, characterized in that: The second stirring mechanism includes an isolation sleeve (9), which is formed at the bottom of the inner shell (5). The inside of the isolation sleeve (9) is rotatably connected to a rotating shaft (10) via a bearing (901). A stirring blade (12) is fixedly installed at the lower end of the rotating shaft (10).

4. The energy-saving electric heating stainless steel reaction kettle for pour point depressant for oil and gas gathering and transportation according to claim 3, characterized in that: The magnetic coupler includes an upper samarium cobalt magnetic ring (8) and a lower samarium cobalt magnetic ring (11). The upper samarium cobalt magnetic ring (8) is fixed at the bottom of the stirring shaft (4), and the lower samarium cobalt magnetic ring (11) is fixed at the upper end of the rotating shaft (10).

5. The energy-saving electric heating stainless steel reaction kettle for pour point depressant for oil and gas gathering and transportation according to claim 2, characterized in that: A scraper (401) is fixedly installed at the bottom of the stirring shaft (4), and the scraper (401) slides in contact with the bottom of the inner shell (5).

6. The energy-saving electric heating stainless steel reaction kettle for pour point depressant for oil and gas gathering and transportation according to claim 1, characterized in that: A lifting ring (202) is fixedly installed on the top of the top cover (2).

7. The energy-saving electric heating stainless steel reaction kettle for pour point depressant for oil and gas gathering and transportation according to claim 2, characterized in that: A temperature sensor (13) is installed inside the heating chamber (6). The temperature sensor (13) is electrically connected to the controller (103). The electric heating plate (7) and the motor (3) are both controlled by the controller (103).

8. The energy-saving electrically heated stainless steel reactor for use as a pour point depressant in oil and gas gathering and transportation according to claim 7, characterized in that: The outer wall of the outer shell (1) is fixedly installed with a plurality of connecting ears (101), and the bottom of the connecting ears (101) is fixedly installed with a support leg (102). The controller (103) is fixedly installed on one of the support legs (102).

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