Device for simulating scaling stability in transportation process of coal-oil slurry

Abstract

The utility model relates to the technical field of coal chemical industry, in particular to a device for simulating scaling stability in a coal-oil slurry transportation process. Comprising a coal-oil slurry stirring tank connected with a high-pressure hydrogen pipe, the coal-oil slurry stirring tank is connected with one end of a simulation conveying pipe through a feeding pipe, the other end of the simulation conveying pipe is connected with a coal-oil slurry buffer tank through a discharging pipe, the coal-oil slurry buffer tank is connected with the coal-oil slurry stirring tank through a circulating pipe, and a coal-oil slurry circulating pump is arranged on the circulating pipe; an oil-coal-slurry conveying pump is arranged on the feeding pipe, the feeding pipe is connected with a plurality of feeding branch pipes, each feeding branch pipe is provided with a branch pipe valve and a branch pipe flowmeter, the discharging pipe is connected with a plurality of discharging branch pipes, and the two ends of a plurality of simulation conveying pipes with different inner diameters are connected with the feeding pipe and the discharging pipe through the feeding branch pipes and the discharging branch pipes respectively. A plurality of pressure gauges are arranged on the simulation conveying pipe at intervals, and a heat tracing sleeve is arranged outside the simulation conveying pipe. The device is reasonable in structural arrangement, and is favorable for mastering the scaling risk of the coal-oil slurry in advance in the production process so as to carry out response treatment in time.

Description

Technical Field

[0001] This utility model relates to the field of coal chemical technology, specifically to a device for simulating scaling stability during the transportation of oil-coal slurry. Background Technology

[0002] The raw material used in kerosene co-refining is coal-oil slurry, a solid-liquid mixture composed of residual oil, pulverized coal, and a solid catalyst. Due to the high concentration of pulverized coal, the uniformity of the raw materials can be maintained during the mixing and preparation of the coal-oil slurry. However, during long-term, long-distance transportation of the slurry, pulverized coal is prone to settling and scaling. Scaling will lead to unstable slurry feeding and cause pipeline blockages, resulting in production stoppages.

[0003] Chinese invention patent application publication number CN108872526A discloses a rapid detection method for the stability of oil-coal slurry, which can detect the settling of coal powder during the storage of oil-coal slurry. However, this method is only applicable to the static storage stability of oil-coal slurry and does not consider the stability of oil-coal slurry during dynamic transportation in actual production. Therefore, there is a need for a device that can simulate the scaling process during the dynamic transportation of oil-coal slurry to study the stability of oil-coal slurry during transportation, which can provide a basis for optimizing and improving the raw material transportation system in coal-oil co-refining production. Utility Model Content

[0004] The technical problem to be solved by this utility model is to propose a scaling stability simulation device for oil-coal slurry transportation process. The device has a reasonable structure and can simulate the scaling conditions of oil-coal slurry raw materials during transportation in the coal-oil co-refining industrial production process. This helps to understand the scaling risks of oil-coal slurry in advance during production and to take timely countermeasures.

[0005] The oil-coal slurry transportation process scaling stability simulation device of this utility model includes an oil-coal slurry mixing tank connected to a high-pressure hydrogen pipe. The oil-coal slurry mixing tank is connected to one end of a simulated conveying pipe through a feeding pipe. The other end of the simulated conveying pipe is connected to an oil-coal slurry buffer tank through a discharge pipe. The oil-coal slurry buffer tank is connected to the oil-coal slurry mixing tank through a circulation pipe. An oil-coal slurry circulation pump is installed on the circulation pipe. An oil-coal slurry conveying pump is installed on the feeding pipe. The feeding pipe is connected to multiple feeding branch pipes. Branch pipe valves and branch pipe flow meters are installed on the feeding branch pipes. Multiple discharge branch pipes are connected to the discharge branch pipes through the feeding branch pipes and discharge branch pipes, respectively. Multiple pressure gauges are spaced apart on the simulated conveying pipes. A heat tracing jacket is installed on the outside of the simulated conveying pipes.

[0006] Preferably, both the oil-coal slurry mixing tank and the oil-coal slurry buffer tank are high-pressure sealing devices, and both the oil-coal slurry mixing tank and the oil-coal slurry buffer tank are equipped with a stirring mechanism.

[0007] Preferably, both the oil-coal slurry mixing tank and the oil-coal slurry buffer tank are equipped with an electric heating jacket.

[0008] Preferably, a temperature sensor is installed inside the simulated delivery pipe.

[0009] Preferably, there are multiple simulated delivery pipes, each with a different inner diameter.

[0010] Preferably, multiple pressure gauges are evenly distributed on the simulated delivery pipe.

[0011] Preferably, it also includes a data collection system, in which the branch flow meter, pressure gauge and temperature sensor are all electrically connected.

[0012] Valves can be installed on the pipeline as needed to control the flow of materials within the pipeline. The opening and closing of the valves can be used to conveniently control the flow of materials within the pipeline and to regulate the material flow rate.

[0013] The oil-coal slurry transport process conforms to the hydrodynamic characteristics of fuel oils such as residual oil, heavy oil, and catalytic cracking slurry. During stable transport, pressure drops exist between different points in the pipeline from inlet to outlet due to pipeline resistance losses over long distances. When the oil-coal slurry system becomes unstable and coal powder settles and scales, the coal powder scale adhering to the inner wall increases the pipeline resistance coefficient, thereby increasing the pipeline pressure drop. By recording the pressure drop at various points in the pipeline in real time and identifying the time points of abrupt pressure drop changes, the scaling situation of the oil-coal slurry in the pipeline can be quickly identified.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The structure of this utility model is reasonably designed, which can simulate the scaling conditions of oil-coal slurry raw materials during transportation in the coal-oil co-refining industrial production process, and collect, analyze and study the data, which helps to grasp the scaling risk of oil-coal slurry in advance during the production process and take timely countermeasures.

[0016] 2. By setting pressure gauges at different locations in the simulated delivery pipe, pressure data at various points in the pipe can be collected, pressure changes can be recorded in real time, and the pressure drop of the oil-coal slurry can be analyzed; the initial pressure of the oil-coal slurry can be set through the high-pressure hydrogen pipe.

[0017] 3. By setting up simulated conveying pipes with different inner diameters in parallel and switching the on and off of the oil-coal slurry through branch valves, the influence of the pipe inner diameter on the scaling of the oil-coal slurry can be further explored.

[0018] 4. The flow rate of the oil-coal slurry in the simulated delivery pipe is adjusted by the oil-coal slurry delivery pump and monitored by the branch pipe flow meter. The temperature of the oil-coal slurry in the simulated delivery pipe is kept constant by the electric heating jacket and the heat tracing jacket, which increases the reliability of the simulation experiment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] In the diagram: 1. Coal-oil slurry mixing tank; 2. High-pressure hydrogen pipe; 3. Feeding pipe; 4. Simulated conveying pipe; 5. Discharge pipe; 6. Coal-oil slurry buffer tank; 7. Circulation pipe; 8. Coal-oil slurry circulation pump; 9. Coal-oil slurry conveying pump; 10. Feeding branch pipe; 11. Branch pipe valve; 12. Branch pipe flow meter; 13. Discharge branch pipe; 14. Pressure gauge; 15. Heating jacket; 16. Mixing mechanism; 17. Electric heating jacket. Detailed Implementation

[0021] The present invention will now be described clearly and completely with reference to the accompanying drawings.

[0022] like Figure 1 As shown, the oil-coal slurry transportation process scaling stability simulation device includes an oil-coal slurry mixing tank 1 connected to a high-pressure hydrogen pipe 2. The oil-coal slurry mixing tank 1 is connected to one end of a simulated conveying pipe 4 via a feeding pipe 3. The other end of the simulated conveying pipe 4 is connected to an oil-coal slurry buffer tank 6 via a discharge pipe 5. The oil-coal slurry buffer tank 6 is connected to the oil-coal slurry mixing tank 1 via a circulation pipe 7. An oil-coal slurry circulation pump 8 is installed on the circulation pipe 7. An oil-coal slurry conveying pump 9 is installed on the feeding pipe 3. The feeding pipe 3 is connected to multiple feeding branch pipes 10. Branch pipe valves 11 and branch pipe flow meters 12 are installed on the feeding branch pipes 10. The discharge pipe 5 is connected to multiple discharge branch pipes 13. The two ends of multiple simulated conveying pipes 4 with different inner diameters are connected to the feeding pipe 3 and the discharge pipe 5 via the feeding branch pipes 10 and the discharge branch pipes 13, respectively. Multiple pressure gauges 14 are spaced apart on the simulated conveying pipes 4. A heat tracing jacket 15 is installed outside the simulated conveying pipes 4.

[0023] Both the oil-coal slurry mixing tank 1 and the oil-coal slurry buffer tank 6 are equipped with a stirring mechanism 16.

[0024] Both the oil-coal slurry mixing tank 1 and the oil-coal slurry buffer tank 6 are equipped with an electric heating jacket 17.

[0025] A temperature sensor is installed inside the simulated delivery pipe 4.

[0026] The simulated delivery pipe 4 has multiple pipes, each with a different inner diameter.

[0027] Multiple pressure gauges 14 are evenly distributed on the simulated delivery pipe 4.

[0028] It also includes a data collection system, with the branch flow meter 12, pressure gauge 14 and temperature sensor all electrically connected to the data collection system.

[0029] The working process is as follows: The oil-coal slurry is homogeneously mixed in the oil-coal slurry mixing tank 1 by the stirring mechanism 16. The oil-coal slurry is kept at a constant temperature by the electric heating jacket 17. Before the device is put into operation, it is pressurized through the high-pressure hydrogen pipe 2, the oil-coal slurry delivery pump 9 is turned on, the inner diameter of the simulated delivery pipe 4 is selected, the branch valve 11 is opened, and the oil-coal slurry is delivered to the simulated delivery pipe 4 through the feed pipe 3 and the feed branch pipe 10. The branch flow meter 12 measures the flow rate of the oil-coal slurry entering the simulated delivery pipe 4. The heating jacket 15 maintains the oil-coal slurry temperature at a constant temperature. The pressure gauge 14 records the pressure at various points in the simulated delivery pipe 4. The temperature sensor records the temperature of the oil-coal slurry in the simulated delivery pipe 4. The flow rate, pressure and temperature data are uploaded to the data collection system for analysis. After passing through the simulated delivery pipe 4, the oil-coal slurry enters the oil-coal slurry buffer tank 6 through the discharge branch pipe 13 and the discharge pipe 5. After being stirred, it re-enters the oil-coal slurry mixing tank 1 through the circulation pipe 7 under the action of the oil-coal slurry circulation pump 8.

[0030] When different simulated pipes with different inner diameters are required, the pipe can be switched to simulated delivery pipes 4 with different inner diameters via branch valve 11.

Claims

1. A device for simulating scaling stability during oil-coal slurry transportation, characterized in that, The system includes an oil-coal slurry mixing tank (1) connected to a high-pressure hydrogen pipe (2). The oil-coal slurry mixing tank (1) is connected to one end of a simulated conveying pipe (4) via a feeding pipe (3). The other end of the simulated conveying pipe (4) is connected to an oil-coal slurry buffer tank (6) via a discharge pipe (5). The oil-coal slurry buffer tank (6) is connected to the oil-coal slurry mixing tank (1) via a circulation pipe (7). An oil-coal slurry circulation pump (8) is installed on the circulation pipe (7). An oil-coal slurry conveying pump (9) is installed on the feeding pipe (3). The feeding pipe (3) is connected to... There are multiple feed branch pipes (10), and branch pipe valves (11) and branch pipe flow meters (12) are provided on the feed branch pipes (10). The discharge pipe (5) is connected to multiple discharge branch pipes (13). Multiple simulated conveying pipes (4) with different inner diameters are connected to the feed pipe (3) and the discharge pipe (5) at both ends through the feed branch pipes (10) and the discharge branch pipes (13), respectively. Multiple pressure gauges (14) are provided at intervals on the simulated conveying pipes (4). The simulated conveying pipes (4) are provided with a heat tracing jacket (15) on the outside.

2. The device for simulating scaling stability during oil-coal slurry transportation according to claim 1, characterized in that, Both the oil-coal slurry mixing tank (1) and the oil-coal slurry buffer tank (6) are equipped with a stirring mechanism (16).

3. The device for simulating scaling stability during oil-coal slurry transportation according to claim 1, characterized in that, Both the oil-coal slurry mixing tank (1) and the oil-coal slurry buffer tank (6) are equipped with an electric heating jacket (17).

4. The device for simulating scaling stability during oil-coal slurry transportation according to claim 1, characterized in that, A temperature sensor is installed inside the simulated delivery pipe (4).

5. The device for simulating scaling stability during oil-coal slurry transportation according to claim 1, characterized in that, The simulated delivery pipe (4) has multiple pipes, each with a different inner diameter.

6. The oil-coal slurry transportation process scaling stability simulation device according to claim 1, characterized in that, Multiple pressure gauges (14) are evenly distributed on the simulated delivery pipe (4).

7. The oil-coal slurry transportation process scaling stability simulation device according to claim 4, characterized in that, It also includes a data collection system, with the branch flow meter (12), pressure gauge (14) and temperature sensor all electrically connected to the data collection system.

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