Optimized and improved device for solvent tank of hydrocarbon generation simulation experiment instrument

Abstract

The utility model belongs to the technical field of hydrocarbon generation simulation experiment instruments, and discloses an optimized and improved solvent tank device of a hydrocarbon generation simulation experiment instrument, which comprises a solvent tank, the solvent tank is in an externally-connected semi-open type and comprises a tank body and a cover, and the cover is provided with a first liquid outlet, a gas inlet and a second liquid outlet which are connected with an externally-connected pipeline. A first solvent valve and an emptying valve are arranged on a pipeline connected with the first liquid outlet, a second solvent valve and a system evacuation valve are arranged on a pipeline connected with the second liquid outlet, the air inlet is connected with an air pipe, and the other ends of the first liquid outlet and the second liquid outlet are respectively connected with a first liquid outlet pipeline and a second liquid outlet pipeline in the tank body. According to the utility model, the solvent tank is improved into the detachable semi-open solvent tank, the solvent tank is rotatably opened to supplement a solvent, and the solvent tank can be periodically cleaned to avoid polluting the cleaned solvent with oil, so that the influence of toxic volatile gas on the health of experimenters is reduced; pipelines are simplified; and an external pipeline is reserved on the solvent tank and is used for detecting the air tightness of the device.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrocarbon generation simulation experiment instruments, in particular to a solvent tank optimization and improvement device for hydrocarbon generation simulation experiment instruments. Background Art

[0002] Hydrocarbon generation simulation primarily relies on a diagenetic and hydrocarbon-generating temperature and pressure simulation test set. This allows for dynamic control of temperature and pressure, and combines the geological conditions of the sample (including tectonic, thermal, and burial histories) to closely simulate the hydrocarbon generation process of organic matter deposited in the actual geological hydrocarbon generation and expulsion strata. Understanding the hydrocarbon generation potential and processes of source rocks provides a scientific basis for the effective development of oil and gas resources. However, oil and gas blockage of pipelines is common during experiments, so instrument pipelines are typically cleared and cleaned after the experiment.

[0003] Currently, cleaning hydrocarbon generation simulation instruments is complex, involving steps such as solvent tank inlet and outlet operations, segmented cleaning of the pipelines, and collection of the cleaning fluid. During these operations, the solvent tank refilling method is cumbersome, requiring multiple refills for each cleaning. Furthermore, the lack of regular solvent tank cleaning cannot guarantee the presence of impurities. Furthermore, the organic solvent, dichloromethane, is volatile and toxic, leading to reagent waste and health hazards for laboratory personnel. Segmented cleaning of the pipelines is complex, as the air compressor serves only to inject air and expel the solvent. The solvent's presence in the pipelines is extremely short, as it is immediately expelled upon injection, resulting in poor cleaning effectiveness and often requiring multiple repetitive cleaning cycles. The oily solvent removed from the cleaning process can be poured into an oil-containing cold trap. After shaking and cleaning the cold trap, the solvent is poured into a water-bath evaporation flask on a rotary evaporator to separate the oil from the organic solvent, collect the pure oil product, and recover the organic solvent. Currently, dichloromethane is a commonly used organic solvent in laboratories. It has a very low boiling point and is volatile at room temperature, making it easy to separate from the oil. In addition to the complicated cleaning process, the operation process of the existing device when vacuuming is very complicated.

[0004] Therefore, it is urgent to study an optimized and improved device for the solvent tank of the hydrocarbon generation simulation experimental instrument, which can efficiently replenish the solvent, facilitate the subsequent cleaning of the pipeline, and reduce the complexity of the air tightness of the detection device. Utility Model Content

[0005] This utility model provides a device for optimizing and improving the solvent tank of a hydrocarbon generation simulation experiment instrument to address the aforementioned technical problems. 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 of 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 technical solutions adopted in this utility model are as follows:

[0007] A device for optimizing and improving a solvent tank in a hydrocarbon generation simulation experiment instrument comprises a solvent tank, which is an external semi-open type and comprises a tank body and a lid. The lid is provided with a first liquid outlet, an air inlet, and a second liquid outlet connected to an external pipeline. A first solvent valve and a vent valve are provided on the pipeline connected to the first liquid outlet, a second solvent valve and a system evacuation valve are provided on the pipeline connected to the second liquid outlet, the air inlet is connected to an air pipe, and the other ends of the first liquid outlet and the second liquid outlet are respectively connected to the first liquid outlet pipeline and the second liquid outlet pipeline inside the tank body.

[0008] Optionally, a screw bayonet is provided at the position where the lid is connected to the tank body.

[0009] Optionally, the first liquid outlet pipe and the second liquid outlet pipe pass through the top end and the bottom end of the tank body.

[0010] Optionally, the first liquid outlet, the air inlet and the second liquid outlet are sealed with nuts when idle.

[0011] The technical solution provided by the embodiment of the present invention may have the following beneficial effects:

[0012] The device of this utility model has three main functions: directly replenishing the dichloromethane solvent required for cleaning, directly cleaning the detachable solvent tank, and testing the air tightness of the device, as follows:

[0013] Based on the existing device, the solvent tank is improved into a detachable semi-open solvent tank, which can be rotated to open the solvent tank to replenish the solvent. The solvent tank can also be cleaned regularly to avoid contamination of the oily solvent cleaned out, thereby reducing the impact of toxic volatile gases on the health of experimenters.

[0014] The pipelines of the existing device are relatively complicated. The utility model removes the pipelines of the solvent exhaust valve and the solvent replenishing valve between the solvent valve and the system exhaust valve, simplifies the pipelines, and connects a detachable semi-open solvent tank between the solvent valve and the system exhaust valve.

[0015] An external pipe is left on the solvent tank to introduce nitrogen to test the air tightness of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings herein 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 solvent tank pipeline connection of the utility model;

[0018] Figure 2 This is a schematic structural diagram of the solvent tank cover of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the solvent tank of the utility model;

[0020] Figure 4 This is a schematic diagram of the solvent tank pipeline connection in the prior art.

[0021] Figure numerals: 1. solvent tank, 2. vent valve, 3. first solvent valve, 4. air pipe, 5. second solvent valve, 6. system evacuation valve, 7. first liquid outlet, 8. cover, 9. air inlet, 10. second liquid outlet, 11. screw bayonet, 12. first liquid outlet pipe, 13. second liquid outlet pipe. DETAILED DESCRIPTION

[0022] 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.

[0023] A device for optimizing and improving the solvent tank of a hydrocarbon generation simulation experiment instrument, such as Figure 1-3 As shown, it includes a solvent tank 1, which is an external semi-open type, including a tank body and a lid 8. The lid 8 is provided with a first liquid outlet 7, an air inlet 9 and a second liquid outlet 10 connected to the external pipeline. The pipeline connected to the first liquid outlet 7 is provided with a first solvent valve 3 and a vent valve 2, and the pipeline connected to the second liquid outlet 10 is provided with a second solvent valve 5 and a system evacuation valve 6. The air inlet 9 is connected to the air pipe 4, and the other ends of the first liquid outlet 7 and the second liquid outlet 10 are respectively connected to the first liquid outlet pipe 12 and the second liquid outlet pipe 13 inside the tank body.

[0024] Optionally, a screw bayonet 11 is provided on the lid 8 at the position where it is connected to the tank body.

[0025] Optionally, the first liquid outlet pipe 12 and the second liquid outlet pipe 13 pass through the top end and the bottom end of the tank body.

[0026] Optionally, the first liquid outlet 7, the air inlet 9 and the second liquid outlet 10 are sealed with nuts when they are idle.

[0027] In the prior art, the operation of liquid inflow and outflow from the solvent tank during the experiment includes using the vacuum pump provided in the hydrocarbon generation simulator, which includes a vacuum pressure detection system. The vacuum pump is turned on, and then the solvent evacuation valve on the pipeline connecting the vacuum pump and the solvent tank is opened to make the vacuum pressure in the solvent tank reach -0.1MPa. The organic solvent is replenished into the solvent tank using a hose connected to the outside of the instrument and a solvent replenishment valve that can control the connection state of the hose, as well as the vacuum negative pressure in the solvent tank. This method of replenishing solvent is too cumbersome, and each cleaning requires repeated replenishment of solvent. In addition, the existing tank cannot be disassembled, and the lack of cleaning throughout the year cannot guarantee whether there are impurities in the solvent tank or whether the oil and gas pumped in from the previous round of experiments will affect the recovery of oil and gas in the next experiment. In addition, the organic solvent dichloromethane is volatile and toxic, which can easily cause waste of reagents and endanger the health of the experimenters. The utility model adopts an external semi-open solvent tank, which can directly open the solvent tank and replenish the required solvent inside, which is also convenient for cleaning the solvent tank in the later stage. This greatly simplifies the instrument's piping and reduces operational complexity. It also allows for regular cleaning of the solvent tank, preventing impurities from contaminating the solvent, potentially leading to insufficient purity of the oily solvent during purification. To refill the solvent, simply open the retaining nuts at the liquid outlet and air inlet at both ends of the solvent tank and unscrew the tank cap. After replenishing, screw the tank cap back on and connect the liquid outlets at both ends to the instrument's piping. This reduces the frequency of vacuum pump usage, extending its lifespan, and simplifies the steps required to refill the solvent. It also reduces the risk of solvent volatilization and toxic gases posing a hazard to experimenters during refilling.

[0028] In the prior art, the pipelines are relatively complicated. The utility model removes the pipelines of the solvent evacuation valve and the solvent replenishment valve between the solvent valve and the system evacuation valve, simplifies the pipelines, and connects a semi-open solvent tank between the solvent valve and the system evacuation valve.

[0029] In the prior art, there is no device for checking the airtightness of the experimental instrument. Before the experiment is carried out, it is necessary to evacuate the instrument to eliminate the interference of impurities and other gases on the experiment. Figure 4As shown, before evacuating the sample, close all valves (note that all manual valves only need to be loosened two turns counterclockwise from the tightening position); 2. Open the hydrocarbon exhaust valve, system evacuation valve, main collection valve, hydrocarbon exhaust micro-control valve (this valve is only opened before the experiment, when collecting gases, and when cleaning the pipeline; it should be closed at all other times to prevent excessive pressure from damaging the cold trap), gas-liquid separation valve, and gas collection valve. 3. After opening these valves, turn on the vacuum pump to begin evacuating the sample. When the vacuum pressure remains constant (the pumping time can be extended to remove as much air as possible from the sample), close the valves, open the vacuum pump outlet, and release the evacuated gas. After releasing the gas, tighten the vacuum pump outlet again. However, sometimes the vacuum pressure decreases rapidly and then stabilizes, indicating a leak or blockage within the device. Therefore, the present invention changes the solvent tank to an external semi-open configuration and introduces nitrogen gas into the upper end of the solvent tank to test the device's airtightness and locate the leak. The principle is to use the main collection valve as a boundary. Close the main collection valve, open the first solvent valve and the hydrocarbon discharge valve, and observe if the pressure in the kettle rises slowly, which indicates that the air tightness on the left side is good. Similarly, close the left pipeline, open the second solvent valve, the main collection valve, the gas-liquid separation valve, and the gas collection valve, and observe the gas collection pressure. If the gas collection pressure rises slowly, it indicates that the air tightness is good.

[0030] The utility model integrates pipeline cleaning, solvent circulation recovery, and experimental residual oil collection, simplifies the experimental operation steps, greatly ensures the smooth progress of hydrocarbon generation simulation experiments, improves the accuracy of experimental simulations, effectively saves manpower and material resources, reduces instrument loss, ensures the safety of experimental personnel, and is convenient to use, with high practical value.

[0031] The present invention is not limited to the structures 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 device for optimizing and improving a solvent tank of a hydrocarbon generation simulation experiment instrument, characterized in that: It includes a solvent tank, which is an external semi-open type, including a tank body and a lid. The lid is provided with a first liquid outlet, an air inlet and a second liquid outlet connected to the external pipeline. The pipeline connected to the first liquid outlet is provided with a first solvent valve and a vent valve, and the pipeline connected to the second liquid outlet is provided with a second solvent valve and a system evacuation valve. The air inlet is connected to the air pipe, and the other ends of the first liquid outlet and the second liquid outlet are respectively connected to the first liquid outlet pipeline and the second liquid outlet pipeline inside the tank body.

2. The solvent tank optimization and improvement device for hydrocarbon generation simulation experiment instrument according to claim 1, characterized in that: A spiral bayonet is provided on the position where the lid is connected to the tank body.

3. The device for optimizing and improving the solvent tank of a hydrocarbon generation simulation experiment instrument according to claim 1, characterized in that: The first liquid outlet pipe and the second liquid outlet pipe pass through the top end and the bottom end of the tank body.

4. The device for optimizing and improving the solvent tank of a hydrocarbon generation simulation experiment instrument according to claim 1, characterized in that: The first liquid outlet, the air inlet and the second liquid outlet are sealed with nuts when idle.

Images