Gas-liquid separation pipeline optimization device of hydrocarbon generation simulation experiment instrument

Abstract

The utility model belongs to the technical field of hydrocarbon generation simulation experiment instruments, and discloses a gas-liquid separation pipeline optimizing device of a hydrocarbon generation simulation experiment instrument, which comprises a sample bin, a solvent tank, a cold trap, a sampling device, a hydrocarbon discharge pipeline and a gas-liquid separation pipeline, a gas-liquid separation valve, a gas collection valve, a hydrocarbon discharge micro-control valve, a gas collection pump and a gas collection valve are arranged on the gas-liquid separation pipeline, the hydrocarbon discharge pipeline and the gas-liquid separation pipeline are bounded by a solvent valve, the sample bin is connected with a solvent tank through the hydrocarbon discharge pipeline, the solvent tank is connected with a cold trap through the gas-liquid separation pipeline, an oil absorption material block is arranged in the cold trap, and the solvent tank is connected with a vacuum pump through a pipeline. The vacuum pump is connected with the gas-liquid separation pipeline through a pipeline, the connection point is located between the gas collection valve and the hydrocarbon expulsion micro-control valve, and the sampling device is used for sampling gas in the gas collection pump. After the structure of the cold trap is optimized, gas, oil and water are separated at one time, and the experiment efficiency and precision are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrocarbon generation simulation experimental instruments, in particular to a gas-liquid separation pipeline optimization device of the hydrocarbon generation simulation experimental instrument. Background Art

[0002] Currently, the oil-gas separation method for hydrocarbon generation simulation experiments involves opening the hydrocarbon discharge valve to collect the oil and gas in the pipeline between the hydrocarbon discharge valve and the main collection valve. The hydrocarbon discharge valve is then closed, the main collection valve is opened, and the hydrocarbon discharge microcontroller is activated. The oil and gas enter the cold trap through the gas-liquid separation valve, where they are separated. The oil and water remain in the tank after cooling, while the gas enters the gas collection device behind it through the gas collection valve. After the experiment, the experimental pipeline is cleaned, involving steps such as liquid inlet and outlet operations in the solvent tank, segmented cleaning of the pipeline, and collection of the cleaning fluid.

[0003] The existing oil and gas separation method is prone to the following problems: (1) The cold trap is a collection tank for oil. The pipeline connected to the cold trap is kept open during the experiment. It is often blocked due to the low temperature of the cold trap and difficult to clear, affecting the experimental process; (2) The blockage of the cold trap basically occurs on the air inlet side. At this time, it is generally used to blow hot air with a hair dryer and knock and vibrate the pipeline to gasify the attached solid oil and clear the pipeline. However, the above operation will loosen the screws on the air inlet side, resulting in air leakage, which will cause large errors in the experimental results and also pollute the laboratory environment; (3) After the oil and gas are generated, they must pass through the hydrocarbon discharge valve, the collection main valve, and the hydrocarbon discharge micro-control valve before reaching the separation device. The pipeline is very long, and the small molecule oil will condense due to the temperature drop during the discharge process, which will make the experimental results inaccurate. When cleaning after the experiment, it needs to be divided into two batches and two directions. The pipeline required for cleaning is long and time-consuming and labor-intensive; (4) After the oil is collected in the cold trap, it is usually first extracted with dichloromethane, and then the oil and water are separated by liquid separation, and then the final oil product is obtained by water bath rotary evaporation. This process takes a long time and is prone to the loss of small molecule hydrocarbons; (5) Since the instrument pipelines are made of special materials, the water added in the experiment can only be deionized ultrapure water, and no ions can be present, otherwise it will cause corrosion to the instrument pipeline, which greatly limits the experiment.

[0004] Therefore, it is urgent to study a gas-liquid separation pipeline optimization device for hydrocarbon generation simulation experimental instruments. Utility Model Content

[0005] To address the aforementioned technical issues, the present invention provides a gas-liquid separation pipeline optimization device for a hydrocarbon generation simulation experimental instrument. To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is provided below. This summary is not intended to be a comprehensive review, identify key or important components, or delineate the scope of protection for these embodiments. Its sole purpose is to present some concepts in a simplified form, serving as a prelude to the detailed description that follows.

[0006] The utility model adopts the following technical solutions:

[0007] A gas-liquid separation pipeline optimization device for a hydrocarbon generation simulation experimental instrument comprises a sample chamber, a solvent tank, a cold trap, a sampling device, a hydrocarbon exhaust pipeline and a gas-liquid separation pipeline. The hydrocarbon exhaust pipeline is provided with a hydrocarbon exhaust valve, a vent valve and a solvent valve. The gas-liquid separation pipeline is provided with a gas-liquid separation valve, a gas collecting valve, a hydrocarbon exhaust micro-control valve, a gas collecting pump and a gas collecting valve. The hydrocarbon exhaust pipeline and the gas-liquid separation pipeline are separated by the solvent valve. The sample chamber is connected to the solvent tank via the hydrocarbon exhaust pipeline. The solvent tank is connected to the cold trap via the gas-liquid separation pipeline. An oil absorption material block is provided in the cold trap. The solvent tank is connected to a vacuum pump via a pipeline. The vacuum pump is connected to the gas-liquid separation pipeline via a pipeline. The connection point is located between the gas collecting valve and the hydrocarbon exhaust micro-control valve. The sampling device is used to sample the gas in the gas collection pump.

[0008] Optionally, a solvent evacuation valve is provided on the pipeline connecting the solvent tank to the vacuum pump.

[0009] Optionally, an automatic gas meter is provided on the pipeline between the gas collecting valve and the sampling device.

[0010] Optionally, at least two supporting flanges are provided on the inner wall of the cold trap for placing oil absorbing material blocks.

[0011] Optionally, a solvent replenishing valve is provided on another external pipe of the solvent tank.

[0012] Optionally, the solvent tank is connected to an air compressor via a pipeline, and a solvent air pressure valve is provided on the pipeline.

[0013] The utility model has the following beneficial effects:

[0014] After the cold trap structure is optimized, the utility model can separate gas, oil and water at one time, thereby improving experimental efficiency and experimental accuracy; the adjustment of the gas-liquid separation pipeline reduces the risk of pipeline blockage, and before the transformation, the cleaning pipeline is long and requires a large amount of organic solvent dichloromethane. After the experiment is over, rotary evaporation is required to collect the generated oil and recover the organic solvent, which is cumbersome. After the cold trap is moved forward, the pipeline required for cleaning is greatly shortened, the gas line does not need to be cleaned or can be cleaned once at a long time, and the organic solvent dichloromethane required for cleaning is also reduced, which can effectively reduce consumables and simplify experimental operations; while increasing the function of the hydrocarbon generation simulation experimental instrument, the impact on the instrument can be minimized.

[0015] The utility model ensures the smooth progress of hydrocarbon generation simulation experiments to a great extent, improves the accuracy of experimental simulation, and at the same time improves experimental efficiency, saves consumables, and ensures the safety of experimental personnel. The optimized experimental instrument is easy to operate and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0017] Figure 1 This is a schematic diagram of the gas-liquid separation and cleaning pipeline of a gas-liquid separation pipeline optimization device of a hydrocarbon generation simulation experimental instrument of the utility model;

[0018] Figure 2 It is a schematic diagram of the gas-liquid separation and cleaning pipeline in the prior art;

[0019] Figure 3 It is a schematic diagram of the cold trap structure of the utility model.

[0020] Figure numerals: 1. Sample chamber; 2. Hydrocarbon exhaust valve; 3. Vent valve; 4. Solvent valve; 5. System evacuation valve; 6. Collection main valve; 7. Hydrocarbon exhaust micro-control valve; 8. Gas-liquid separation valve; 9. Gas collection valve; 10. Gas collecting valve; 11. Cold trap; 12. Solvent replenishment valve; 13. Solvent tank; 14. Solvent air pressure valve; 15. Solvent evacuation valve; 16. Vacuum pump; 17. Gas collection pump; 18. Automatic gas meter; 19. Sampling device; 20. Oil absorption material block; 21. Support flange. DETAILED DESCRIPTION

[0021] The following description and the accompanying drawings sufficiently illustrate the specific embodiments of this invention to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The scope of the embodiments herein includes the entire scope of the claims, and all available equivalents of the claims.

[0022] A gas-liquid separation pipeline optimization device for a hydrocarbon generation simulation experimental instrument, such as Figure 1 and 3 As shown, it includes a sample chamber 1, a solvent tank 13, a cold trap 11, a sampling device 19, a hydrocarbon discharge pipeline and a gas-liquid separation pipeline. The hydrocarbon discharge pipeline is provided with a hydrocarbon discharge valve 2, a vent valve 3 and a solvent valve 4. The gas-liquid separation pipeline is provided with a gas-liquid separation valve 8, a gas collecting valve 9, a hydrocarbon discharge micro-control valve 7, a gas collecting pump 17 and a gas collecting valve 10. The hydrocarbon discharge pipeline and the gas-liquid separation pipeline are separated by the solvent valve 4. The sample chamber 1 is connected to the solvent tank 13 via the hydrocarbon discharge pipeline. The solvent tank 13 is connected to the cold trap 11 via the gas-liquid separation pipeline. An oil absorption material block 20 is provided in the cold trap 11. The solvent tank 13 is connected to the vacuum pump 16 via a pipeline. The vacuum pump 16 is connected to the gas-liquid separation pipeline via a pipeline, and the connection point is located between the gas collecting valve 9 and the hydrocarbon discharge micro-control valve 7. The sampling device 19 is used to sample the gas in the gas collection pump 17.

[0023] Optionally, a solvent evacuation valve 15 is provided on the pipeline connecting the solvent tank 13 to the vacuum pump 16 .

[0024] Optionally, an automatic gas meter 18 is provided on the pipeline between the gas collecting valve 10 and the sampling device 19 .

[0025] Optionally, at least two supporting flanges 21 are provided on the inner wall of the cold trap 11 for placing the oil absorbing material block 20 .

[0026] Optionally, a solvent replenishing valve 12 is provided on another external pipe of the solvent tank 13 .

[0027] Optionally, the solvent tank 13 is connected to an air compressor via a pipeline, and a solvent air pressure valve 14 is provided on the pipeline.

[0028] This utility model includes adjusting the cold trap position, removing the collection main valve pipeline, and optimizing the cold trap structure. Specific experimental operations include:

[0029] Vacuuming before the experiment: After installing the kettle body in the sample chamber and setting up the experimental program, open the hydrocarbon exhaust valve 2, the system vacuum valve 5, the gas-liquid separation valve 8, the gas collection valve 9, the hydrocarbon exhaust micro-control valve 7, and finally turn on the vacuum pump 16 to vacuum the pipeline to achieve the vacuum environment before the experiment and exhaust the impurities.

[0030] Gas-Liquid Separation and Oil-Gas Collection During the Experiment: Before the experiment begins, the oil-absorbing material block 20 in the cold trap 11 must be weighed, denoted as M1. When the pressure in the kettle reaches a certain limit or the experiment ends, the hydrocarbon discharge valve 2 is opened, and the oil and gas generated during the experiment enter the cold trap 11 through the gas-liquid separation valve 8. Under the action of the cold trap 11, the gas and liquid are separated. At the same time, due to the special function of the oil-absorbing material block 20, water can fall below the support flange 21 of the cold trap body, while the oil product remains in the oil-absorbing material block 20, allowing the product to remain in the cold trap 11 for a longer period of time, allowing the oil and gas to fully separate. The gas collection valve 9 and the hydrocarbon discharge micro-control valve 7 are opened, and the gas is collected by the gas collection pump 17. During this process, the gas collection pressure must be observed and the air pressure in the pipeline monitored to prevent dangerous excessive pressure. To start gas collection, the gas storage valve is slowly opened, and the gas enters the glass communicating bottle. The gas is then collected using the water displacement method. The automatic gas meter 18 automatically records the gas volume. At this point, residual oil and gas still remain in the pipeline and cannot be completely expelled. Gas collection pump 17 is required to expel the residual gas. Close hydrocarbon discharge micro-control valve 7 and raise gas collection pump 17 to expel the gas in gas collection pump 17. Repeat the previous operation. Open hydrocarbon discharge valve 2, gas-liquid separation valve 8, gas collection valve 9, and hydrocarbon discharge micro-control valve 7, lower gas collection pump 17, separate the residual oil and gas in the pipeline, and collect the gas in gas collection pump 17. Repeat the previous operation to expel the gas in gas collection pump 17. Remove cold trap 11, remove oil absorbing material block 20, and weigh it, recording its weight as M2. The difference between M2 and M1 is the weight a of oil carried by the gas in the hydrocarbon generation thermal simulation experiment. Oil absorbing material block 20 is preferably made of an inorganic flat ceramic membrane.

[0031] The existing device cleans the pipeline after the experiment: the steps involved include solvent tank liquid inlet and outlet operations, pipeline segment cleaning and cleaning liquid collection, such as Figure 2 As shown, the specific operations are:

[0032] (1) Liquid inlet and outlet of the solvent tank: Use the vacuum pump 16 included in the hydrocarbon generation simulator. The vacuum pump 16 includes a vacuum pressure detection system. Turn on the vacuum pump 16, then open the solvent evacuation valve 15 on the pipeline connecting the vacuum pump 16 to the solvent tank 13, so that the vacuum pressure in the solvent tank 13 reaches -0.1 MPa. Use the hose connected to the solvent tank 13 and connected to the outside of the instrument, the solvent replenishment valve 12 that can control the connection state of the hose, and the vacuum negative pressure in the solvent tank 13 to replenish the organic solvent into the solvent tank 13. After the vacuum pressure is reached, close the solvent evacuation valve 15, then turn off the vacuum pump 16. Pour the organic solvent into the beaker, immerse the hose connected to the solvent tank 13 in the beaker, and then open the solvent replenishment valve 12 to use the vacuum negative pressure to suck in the solvent.

[0033] (2) Segmented cleaning of pipelines: including the cleaning of the pipeline on the hydrocarbon discharge side and the cleaning of the oil and gas collection pipeline side. The two pipelines are separated by the solvent valve 4 and are cleaned by injecting air through an external air compressor connected to the hydrocarbon generation simulator. The air compressor is connected to the solvent tank 13 and is controlled by the solvent pressure valve 14 in the middle. When the solvent tank 13 is filled with solvent, the solvent pressure valve 14 is opened by the air compressor to inject air and then the solvent valve 4 is opened to inject the solvent into the main experimental pipeline through which the oil and gas pass in the experiment. All valves on the side to be cleaned are opened. When cleaning the pipeline on the hydrocarbon discharge side, open the solvent valve 4 and the hydrocarbon discharge valve 2, and use a beaker to collect the organic solvent after flushing at the hydrocarbon discharge pipe mouth; when cleaning the oil and gas collection pipeline side, open the solvent valve 4, the main collection valve 6, and the hydrocarbon discharge micro-control valve 7, and finally use a beaker to collect the organic solvent after flushing at the gas-liquid separation valve 8.

[0034] (3) Collection of cleaning liquid: The oily solvent washed out can be poured into an oil-containing cold trap. After shaking and cleaning the cold trap, use a separatory funnel to separate the liquid and remove the water. Then pour the liquid into the water bath evaporation heating bottle of the rotary evaporator to separate the oil and organic solvent. The pure oil product is collected and the organic solvent is recovered. The organic solvent commonly used in the laboratory is dichloromethane, which has a very low boiling point, evaporates at room temperature, and is easy to separate from the oil.

[0035] The cleaning steps of the experimental pipeline in this embodiment are basically the same as before optimization, but the number of pipelines to be cleaned is greatly reduced, including the entry of organic solvent into the solvent tank, segmented cleaning of the pipeline, and collection of the produced oil. The specific operations are:

[0036] (1) The organic solvent enters the solvent tank.

[0037] (2) Segmented cleaning of pipelines: including the cleaning of the pipeline on the hydrocarbon discharge side and the cleaning of the cold trap side. The two pipelines are separated by the solvent valve 4 and are cleaned by injecting air through an external air compressor connected to the hydrocarbon generation simulator. The vacuum pump 16 is connected to the solvent tank 13, and the solvent pressure valve 14 is used in the middle to control it. When the solvent tank 13 is filled with solvent, the solvent pressure valve 14 is opened by the air compressor to inject air and then the solvent valve 4 is opened to inject the solvent into the main experimental pipeline through which the oil and gas pass in the experiment. To clean the side, all the valves on that side are opened. When cleaning the pipeline on the hydrocarbon discharge side, keep the gas-liquid separation valve 8 closed, open the solvent valve 4 and the hydrocarbon discharge valve 2, and use a beaker to collect the organic solvent after flushing at the hydrocarbon discharge pipe mouth; when cleaning the oil and gas collection pipeline side, open the solvent valve 4 and use a beaker to collect the organic solvent after flushing at the gas-liquid separation valve 8 to complete the cleaning.

[0038] (3) Oil collection: After optimization, the amount of organic solvent required for cleaning is greatly reduced. The oily solvent can be directly placed in a fume hood to allow the organic solvent to evaporate naturally. The oil and organic solvent are separated, and the pure oil product can be collected to obtain the oil weight b. The sum of a and b is the weight of the oil generated in the hydrocarbon generation thermal simulation experiment. Currently, the commonly used organic solvent in the laboratory is dichloromethane, which has an extremely low boiling point, evaporates at room temperature, and is easy to separate from the oil.

[0039] Currently, the primary application of hydrocarbon generation simulation instruments is to set up a temperature and pressure system that simulates similar formation conditions, ultimately exploring the hydrocarbon generation capacity, dynamics, and characteristics of the sample under these conditions. However, geological simulation of formations is limited to temperature and pressure conditions, and it is impossible to incorporate other environmental factors into the experimental conditions, such as the influence of ions in certain formations on the migration and enrichment of elements in the sample. After optimization, the functionality of hydrocarbon generation simulation instruments has been increased, allowing the inclusion of a range of substances, such as metal catalysts, in the experiment. By using the controlled variable method, the migration and occurrence patterns of metal elements in coal-bearing formations and their influencing factors can be explored, which has high theoretical significance and practical value.

[0040] The present invention is not limited to the structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope of the present invention. The scope of the present invention is limited only by the appended claims.

Claims

1. A gas-liquid separation pipeline optimization device for a hydrocarbon generation simulation experiment instrument, characterized in that: It includes a sample bin, a solvent tank, a cold trap, a sampling device, a hydrocarbon exhaust pipeline and a gas-liquid separation pipeline. The hydrocarbon exhaust pipeline is provided with a hydrocarbon exhaust valve, a vent valve and a solvent valve. The gas-liquid separation pipeline is provided with a gas-liquid separation valve, a gas collection valve, a hydrocarbon exhaust micro-control valve, a gas collection pump and a gas collecting valve. The hydrocarbon exhaust pipeline and the gas-liquid separation pipeline are separated by the solvent valve. The sample bin is connected to the solvent tank via the hydrocarbon exhaust pipeline. The solvent tank is connected to the cold trap via the gas-liquid separation pipeline. An oil absorption material block is provided in the cold trap. The solvent tank is connected to the vacuum pump via a pipeline. The vacuum pump is connected to the gas-liquid separation pipeline via a pipeline. The connection point is located between the gas collection valve and the hydrocarbon exhaust micro-control valve. The sampling device is used to sample the gas in the gas collection pump.

2. The gas-liquid separation pipeline optimization device of the hydrocarbon generation simulation experiment instrument according to claim 1, characterized in that: A solvent evacuation valve is provided on the pipeline connecting the solvent tank to the vacuum pump.

3. The gas-liquid separation pipeline optimization device of the hydrocarbon generation simulation experiment instrument according to claim 1, characterized in that: An automatic gas meter is provided on the pipeline between the gas collecting valve and the sampling device.

4. The gas-liquid separation pipeline optimization device of the hydrocarbon generation simulation experiment instrument according to claim 1, characterized in that: At least two supporting flanges are provided on the inner wall of the cold trap for placing oil absorbing material blocks.

5. The gas-liquid separation pipeline optimization device of the hydrocarbon generation simulation experiment instrument according to claim 1, characterized in that: A solvent replenishing valve is provided on another external pipe of the solvent tank.

6. The gas-liquid separation pipeline optimization device of the hydrocarbon generation simulation experiment instrument according to claim 1, characterized in that: The solvent tank is connected to an air compressor via a pipeline, and a solvent air pressure valve is provided on the pipeline.

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