Device for continuously adding solid and gas into flowing liquid

Abstract

The invention belongs to the field of multiphase flow erosion corrosion, and relates to a continuous adding device for continuously adding solid and gas into flowing liquid, the main body structure comprises a plurality of feeding channels connected in series, and a solid supply mechanism, a liquid supply mechanism and a gas supply mechanism which are respectively connected with the feeding channels, solid and gas can be directly and continuously added into a liquid pipeline, a liquid storage tank is not needed, solid-liquid two-phase flow does not need to flow through a pipeline pump, and solid-liquid-gas three-phase flow for an erosion corrosion test is directly formed in the liquid pipeline; a solid-liquid-gas three-phase flow erosion corrosion test can be carried out in cooperation with a jet flow type erosion corrosion test device or a pipe flow type erosion corrosion test device, the adding amount of solid, liquid and gas can be controlled by controlling the opening and closing time of a valve, and the adjustable range is large; the device is simple in structure, the solid and gas adding process is continuous, the formed solid-liquid-gas three-phase flow is uniform in component, and the device can be directly connected into a pipe flow type erosion corrosion test device or a jet flow type erosion corrosion test device.

Description

Technical field:

[0001] The present invention belongs to the field of multiphase flow erosion corrosion, and specifically relates to a continuous adding device for continuously adding solids and gases into a flowing liquid, which can directly add solids and gases into a liquid fluid pipeline to form a three-phase flow. Background technology:

[0002] Erosion corrosion is a process in which materials are damaged by the high-speed erosion of a corrosive medium. Depending on the nature of the corrosive medium, erosion corrosion can be divided into single-phase flow erosion corrosion (gas or liquid), two-phase flow erosion corrosion (solid-liquid, gas-liquid, or solid-gas), and three-phase flow erosion corrosion (solid-liquid-gas). Research has found that the corrosion risk caused by multiphase flow erosion is significantly higher than that caused by single-phase flow erosion.

[0003] In existing technologies, three types of testing methods are commonly used: rotary, jet, and tube flow. These methods simulate liquid flow processes in different ways to study erosion corrosion. Rotary test devices simulate liquid erosion by rotating the specimen using a motor; jet test devices simulate liquid erosion by directly spraying the specimen surface; and tube flow test devices simulate the actual flow of fluid within a pipe to evaluate the erosion corrosion performance of the pipe's inner wall. These three types of devices can be used to study erosion corrosion under both single-phase liquid flow and solid-liquid two-phase flow conditions.

[0004] A rotary test apparatus generally includes a liquid storage tank in which the sample rotates, and solid particles are directly added to the liquid to simulate solid-liquid two-phase flow erosion. For example, S. Zhou, MM Stack, and RC Newman (Electrochemical studies of anodic dissolution of mild steel in a carbonate-bicarbonate buffer under erosion-corrosion conditions, Corrosion Science, 1996, 38(7):1071-1084) disclose a rotary erosion-corrosion test apparatus capable of performing solid-liquid two-phase flow erosion. The apparatus investigates the corrosion behavior of mild steel under solid-liquid two-phase flow erosion by adding solid alumina particles to sodium carbonate and sodium bicarbonate solutions. Zhou Hao, Chen Hu, Liu Wen, et al. Study on the two-phase flow erosion-corrosion behavior and synergistic effect of oil casing steel, Journal of Changzhou University (Natural Science Edition), 2020, 32(06): 60-68. A rotating erosion-corrosion test device capable of rotating solid-liquid two-phase flow erosion is disclosed. The solid-liquid two-phase flow erosion-corrosion process of N80 steel is simulated by adding natural gravel to NaCl solutions with different pH values.

[0005] The jet test device forms a solid-liquid two-phase flow by adding solid particles or solid-containing slurry to the jet. There are generally two ways to add solids. The first method is to directly add solid particles to the liquid storage tank and stir it, and then send the solid-liquid two-phase fluid to the spray gun through a pump. For example, Jiang Shengli, Zheng Yugui, Qiao Yanxin, et al. Development of a high-speed jet erosion corrosion experimental device and its real-time dynamic electrochemical test, Corrosion Science and Protection Technology, 2009, 21(05): 489-491. A jet-type solid-liquid two-phase flow erosion corrosion test device is disclosed, which is provided with a slurry tank. After the solid particles are fully stirred in the slurry tank, they are pumped into the spray gun by a rotary cam pump to form a solid-liquid two-phase flow. The second method is to use the pressure field between the high-flow rate fluid and the static fluid to suck the solid-containing slurry into the high-flow rate fluid to form a solid-liquid two-phase flow. For example, Zhang GA, Xu LY, Cheng YF. Investigation of erosion-corrosion of 3003aluminumalloy in ethylene glycol–water solution by impingement jet system, Corrosion Science, 2009, 51(2): 283-290. discloses a jet-type solid-liquid two-phase flow erosion corrosion test device, which is provided with a sand-containing storage tank, in which solid particles are continuously stirred and connected to a high-flow channel. When a high-flow fluid flows in the channel, a pressure difference is formed with the fluid in the storage tank, and the sand-containing liquid is directly sucked in to form a solid-liquid two-phase flow.

[0006] The method for forming solid-liquid two-phase flow in a pipe flow test device is relatively simple. Solid particles are directly added to a liquid storage tank and stirred evenly. The liquid containing the solid particles is then pumped directly into the pipe using a pipeline pump to form a solid-liquid two-phase flow. For example, Bilal FS, Sedrez TA, Shirazi SA. Experimental and CFD investigations of 45- and 90-degree bends and various elbow curvature radii effects on solid particle erosion, Wear, 2021: 203646. A large-scale pipe flow erosion corrosion test device is disclosed. The solid particles are first thoroughly stirred in a large liquid storage tank. The liquid containing the solid particles is then pumped from the bottom of the liquid storage tank using a pipeline pump. The solid-liquid two-phase flow returns to the liquid storage tank after flowing through the test pipeline, achieving continuous operation.

[0007] Currently available solid-liquid two-phase flow erosion corrosion test devices all require a liquid storage tank. During use, solid particles must first be added to the liquid storage tank and continuously stirred to form a solid-liquid two-phase flow. On the one hand, the sedimentation process of solid particles is difficult to avoid, and as the operating time increases, there is a risk that the solid content in the solid-liquid two-phase flow will gradually decrease; on the other hand, the solid-liquid two-phase flow will cause serious damage to the stirring device and the pump impeller, making it difficult for the test device to operate for a long time. In the research on multiphase flow erosion corrosion, there are relatively few studies on solid-liquid-gas three-phase flow erosion corrosion, which are limited to numerical simulations. The already available test devices also have difficulty simulating a uniform solid-liquid-gas three-phase flow erosion corrosion process. Therefore, it is necessary to develop and design a continuous solid and gas addition device to be used in conjunction with the jet erosion corrosion test device and pipe flow erosion corrosion test device in the existing technology to provide technical support for solid-liquid-gas three-phase flow erosion corrosion testing. Summary of the invention:

[0008] The purpose of the present invention is to overcome the shortcomings of the existing technology and develop a device for continuously adding solids and gases to a flowing liquid, which can continuously and evenly add solid particles and gases to the flowing liquid, and directly form a solid-liquid-gas three-phase flow in the fluid pipeline.

[0009] To achieve the above-mentioned objectives, the present invention relates to a device for continuously adding solids and gases to a flowing liquid. The device can continuously and evenly add solids and gases to the flowing liquid to form a solid-liquid-gas three-phase flow. The main structure of the device includes a plurality of feeding channels connected in series and a solid supply mechanism, a liquid supply mechanism, and a gas supply mechanism respectively connected thereto.

[0010] Among them, the number of feeding channels is at least 4, the main structure includes a feeding cylinder and a solid feeding port, a liquid feeding port and a gas feeding port opened on it, the solid feeding port is provided with an overflow pipe with a filter and a solid hopper valve, the liquid feeding port is provided with a liquid flow channel valve, and the gas feeding port is provided with a high-pressure gas pipe with a high-pressure gas valve. The solid hopper valve, liquid flow channel valve and high-pressure gas valve are respectively electrically connected to the valve controller;

[0011] The main structure of the solid supply mechanism includes a solid storage tank and a motor arranged therein, and a solid hopper connected thereto. The solid storage tank and the solid hopper are connected via a solid feeding cylinder.

[0012] The main structure of the liquid supply mechanism includes a flow channel;

[0013] The main structure of the gas supply mechanism includes an air compressor and a high-pressure gas pipeline connected thereto, and a pressure gauge is provided on the high-pressure gas pipeline.

[0014] Specifically, the feeding channel is connected to the solid feeding mechanism through a solid hopper;

[0015] The feeding channel is connected to the liquid supply mechanism through a flow channel;

[0016] The feeding channel is connected with the gas supply mechanism through a high-pressure gas pipe and a high-pressure gas transmission pipe.

[0017] When the solid and gas continuous adding device according to the present invention is used,

[0018] First, the front end of the flow channel is connected to the liquid supply device, and the rear end is connected to the erosion corrosion test device by welding, flange connection or mechanical connection;

[0019] Then, the motor is turned on to continuously add the solid stored in the solid storage tank from the solid storage tank to the solid feeding cylinder, so that the solid passes through the solid feeding cylinder and enters the solid hopper;

[0020] At the same time, the air compressor is turned on to compress the air or other gas into high-pressure gas, and the high-pressure gas is supplied to the feeding channel through the high-pressure gas pipeline. During the gas transmission process, the pressure gauge monitors the pressure of the high-pressure gas in the high-pressure gas pipeline;

[0021] Finally, the solid, gas and liquid in the flow channel are mixed to form a uniform solid-liquid-gas three-phase flow, which is supplied to the erosion corrosion test device;

[0022] During this period, the addition amounts of solid, liquid and gas are controlled respectively by controlling the switching time of the solid hopper valve, liquid flow valve and high-pressure gas valve.

[0023] Compared with the prior art, the present invention can directly add solids and gases continuously into the liquid fluid pipeline, without the need for a liquid storage tank and the solid-liquid two-phase flow does not need to flow through a pipeline pump, and a solid-liquid-gas three-phase flow for the erosion corrosion test is directly formed in the liquid pipeline. The solid-liquid-gas three-phase flow erosion corrosion test can be carried out in conjunction with a jet-type erosion corrosion test device or a pipe-flow erosion corrosion test device. The amount of solid, liquid and gas added can be controlled by controlling the switching time of the valve, and the adjustable range is large; its structure is simple, the solid and gas addition process is continuous, and the solid-liquid-gas three-phase flow formed has uniform composition, and can be directly connected to a pipe-flow erosion corrosion test device or a jet-type erosion corrosion test device, with a wide range of applications and strong applicability. Description of the drawings:

[0024] Figure 1 It is a schematic diagram of the main structural principle of the present invention.

[0025] Figure 2 This is a schematic diagram of the main structural principle of the feeding channel involved in the present invention.

[0026] Figure 3 This is a schematic diagram of the working state of step S1 when the present invention is used.

[0027] Figure 4This is a schematic diagram of the working state of step S2 when the present invention is used.

[0028] Figure 5 This is a schematic diagram of the working state of step S3 when the present invention is used.

[0029] Figure 6 This is a schematic diagram of the working state of step S4 when the present invention is used.

[0030] Figure 7 This is a schematic diagram of the working state of step S5 when the present invention is used.

[0031] Figure 8 This is a schematic diagram of the working state of step S6 when the present invention is used.

[0032] Figure 9 This is a schematic diagram of the working state of step S7 when the present invention is used.

[0033] Figure 10 This is a schematic diagram of the working state of step S8 when the present invention is used. Specific implementation method:

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1:

[0036] The main structure of the solid and gas continuous addition device involved in this embodiment is as follows Figure 1 As shown, it includes a feeding channel 1, a solid supply mechanism 2, a liquid supply mechanism 3 and a gas supply mechanism 4; the four feeding channels 1 are connected in parallel, with the tops connected to the solid supply mechanism 2, the bottoms connected to the liquid supply mechanism 3, and the tops connected to the gas supply mechanism 4;

[0037] The main structure of the feeding channel 1 is as follows Figure 2 As shown, it includes a feeding barrel 11, a filter screen 12, an overflow pipe 13, a solid hopper valve 14, a liquid flow path valve 15, a high-pressure gas valve 16, a high-pressure gas pipe 17 and a valve controller 18; the top of the feeding barrel 11 is provided with an overflow pipe 13 with a filter screen 12 and a solid hopper valve 14, the bottom is provided with a liquid flow path valve 15, and the upper part is provided with a high-pressure gas pipe 17 with a high-pressure gas valve 16, the solid hopper valve 14, the liquid flow path valve 15 and the high-pressure gas valve 16 are electrically connected to the valve controller 18 respectively, and the solid hopper valve 14, the liquid flow path valve 15 and the high-pressure gas valve 16 are all electrically controlled butterfly valves or electrically controlled ball valves, which are controlled by the valve controller 18 to open and close;

[0038] The main structure of the solid supply mechanism 2 includes a solid storage tank 21, a motor 22, a solid hopper 23 and a solid feeding barrel 24; the motor 22 is provided inside the solid storage tank 21 and is connected to the solid hopper 23 via the solid feeding barrel 24;

[0039] The main structure of the liquid supply mechanism 3 includes a flow channel 31, one end of the flow channel 31 is connected to the liquid supply device, and the other end is connected to the erosion corrosion test device;

[0040] The main structure of the gas supply mechanism 4 includes an air compressor 41 , a high-pressure gas pipe 42 and a pressure gauge 43 ; the air compressor 41 is connected to the high-pressure gas pipe 42 , and the high-pressure gas pipe 42 is provided with a pressure gauge 43 .

[0041] The feeding channel 1 is connected to the solid feeding mechanism 2 via a solid hopper 22;

[0042] The feeding channel 1 is connected to the liquid supply mechanism 3 via a flow channel 31;

[0043] The feeding channel 1 is connected to the gas supply mechanism 4 via a high-pressure gas pipe 17 and a high-pressure gas delivery pipe 42. Compared with the automatic feeding device for continuously and uniformly adding solid particulate material to a pressurized fluid in a pressure vessel or pressure pipe disclosed in Chinese Patent No. 202410937009.9, the continuous solid and gas feeding device of this embodiment is as follows:

[0044] The former can continuously add solids and gases to the fluid pipeline without interruption, and the content of solids and gases in the fluid is more uniform. At the same time, the former can add liquid and gas to the pipeline at the same time, forming a solid-liquid-gas three-phase flow in the flowing liquid. The process of adding solid particles to the fluid pipeline is achieved through the combined action of dead weight, liquid flushing and high-pressure gas propulsion.

[0045] The latter involves adding solid particles to the fluid through mechanical piston movement.

[0046] The process of using the solid and gas continuous addition device involved in this embodiment includes the following steps:

[0047] S1: Add solids to the solid storage tank 21, start the motor 22, and transport the solids to the solid hopper 23;

[0048] S2: Open the solid hopper valves 14 of the third and fourth feeding channels 1, and the solid enters the feeding cylinder 11;

[0049] S3: After the feeding cylinders 11 of the third and fourth feeding channels 1 are filled with solids, the solid hopper valve 14 is closed;

[0050] S4: Open the solid hopper valve 14 of the second feeding channel 1, and the solid enters the feeding cylinder 11;

[0051] Open the liquid flow channel valve 15 and the high-pressure gas valve 16 of the fourth feeding channel 1. The solid enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31, forming a solid-liquid-gas three-phase flow.

[0052] S5: Open the solid hopper valve 14 of the first feeding channel 1, and the solid enters the feeding cylinder 11;

[0053] After the feeding cylinder 11 of the second feeding channel 1 is filled with solids, the solid hopper valve 14 is closed;

[0054] Open the liquid flow channel valve 15 and the high-pressure gas valve 16 of the third feeding channel 1. The solid enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31, forming a solid-liquid-gas three-phase flow.

[0055] Close the liquid flow valve 15 and the high-pressure gas valve 16 of the fourth feeding channel 1, and some fluid remains in the feeding cylinder 11;

[0056] S6: After the feeding cylinder 11 of the first feeding channel 1 is filled with solids, the solid hopper valve 14 is closed;

[0057] Open the liquid flow channel valve 15 and the high-pressure gas valve 16 of the second feeding channel 1. The solid enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31, forming a solid-liquid-gas three-phase flow.

[0058] Close the liquid flow valve 15 and the high-pressure gas valve 16 of the third feeding channel 1, and some fluid remains in the feeding cylinder 11;

[0059] Open the solid hopper valve 14 of the fourth feeding channel 1, the solid enters the feeding cylinder 11, and the overflow fluid overflows through the overflow pipe 13;

[0060] S7: Open the liquid flow channel valve 15 and the high-pressure gas valve 16 of the first feeding channel 1. The solid enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31, forming a solid-liquid-gas three-phase flow;

[0061] Close the liquid flow valve 15 and the high-pressure gas valve 16 of the second feeding channel 1, and some fluid remains in the feeding cylinder 11;

[0062] Open the solid hopper valve 14 of the third feeding channel 1, the solid enters the feeding cylinder 11, and the overflow fluid overflows through the overflow pipe 13;

[0063] After the feeding cylinder 11 of the fourth feeding channel 1 is filled with solids, the solid hopper valve 14 is closed;

[0064] S8: Close the liquid flow valve 15 and the high-pressure gas valve 16 of the first feeding channel 1, and some fluid remains in the feeding cylinder 11;

[0065] Open the solid hopper valve 14 of the second feeding channel 1, the solid enters the feeding cylinder 11, and the overflow fluid overflows through the overflow pipe 13;

[0066] After the feeding cylinder 11 of the third feeding channel 1 is filled with solids, the solid hopper valve 14 is closed;

[0067] Open the liquid flow channel valve 15 and the high-pressure gas valve 16 of the fourth feeding channel 1. The solid enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31, forming a solid-liquid-gas three-phase flow.

[0068] S9: Open the solid hopper valve 14 of the first feeding channel 1, the solid enters the feeding cylinder 11, and the overflow fluid overflows through the overflow pipe 13;

[0069] After the feeding cylinder 11 of the second feeding channel 1 is filled with solids, the solid hopper valve 14 is closed;

[0070] Open the liquid flow channel valve 15 and the high-pressure gas valve 16 of the third feeding channel 1. The solid enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31, forming a solid-liquid-gas three-phase flow.

[0071] Close the liquid flow valve 15 and the high-pressure gas valve 16 of the fourth feeding channel 1, and some fluid remains in the feeding cylinder 11;

[0072] S10: After the feeding cylinder 11 of the first feeding channel 1 is filled with solids, the solid hopper valve 14 is closed;

[0073] Open the liquid flow channel valve 15 and the high-pressure gas valve 16 of the second feeding channel 1. The solid enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31, forming a solid-liquid-gas three-phase flow.

[0074] Close the liquid flow valve 15 and the high-pressure gas valve 16 of the third feeding channel 1, and some fluid remains in the feeding cylinder 11;

[0075] Open the solid hopper valve 14 of the fourth feeding channel 1, the solid enters the feeding cylinder 11, and the overflow fluid overflows through the overflow pipe 13;

[0076] S11: Continuously cycle according to the working conditions of steps S7 to S10;

[0077] S12: When it is necessary to stop working, close the motor 22 and all valves of all feeding channels 1;

[0078] S13: Open the liquid flow channel valves 15 and high-pressure air valves 16 of all feeding channels 1. The solid in the feeding cylinder 11 enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31.

[0079] The solid hopper valves 14 of all feeding channels 1 remain closed;

[0080] S14: Close the liquid flow valves 15 and high-pressure gas valves 16 of all feeding channels 1 and the air compressor 41.

[0081] Example 2:

[0082] The specific process of using the solid and gas continuous addition device involved in this embodiment includes the following steps:

[0083] S1: Add solids to the solid storage tank 21, start the motor 22, and transport the solids to the solid hopper 23, as shown in Figure 3 As shown, at this time, all valves of all feeding channels 1 are closed, and the air compressor 41 does not work;

[0084] S2: Open the solid hopper valves 14 of the third and fourth feeding channels 1, and the solid enters the feeding cylinder 11, as shown in FIG. Figure 4 As shown, at this time, all valves of the first and second feeding channels 1 are closed, and the liquid flow channel valve 15 and the high-pressure gas valve 16 of the third and fourth feeding channels 1 are closed; the air compressor 41 does not work;

[0085] S3: After the feeding cylinders 11 of the third and fourth feeding channels 1 are filled with solids, the solid hopper valve 14 is closed. Figure 5 As shown, at this time, all valves of all feeding channels 1 are closed, and the air compressor 41 starts working;

[0086] S4: Open the solid hopper valve 14 of the second feeding channel 1, and the solid enters the feeding cylinder 11;

[0087] Open the liquid flow valve 15 and the high-pressure gas valve 16 of the fourth feeding channel 1. The solid enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31, forming a solid-liquid-gas three-phase flow. Figure 6 As shown, at this time, all valves of the first and third feeding channels 1 are closed, the liquid flow channel valve 15 and the high-pressure gas valve 16 of the second feeding channel 1 are closed, the solid hopper valve 14 of the fourth feeding channel 1 is closed, and the air compressor 41 continues to work;

[0088] S5: Open the solid hopper valve 14 of the first feeding channel 1, and the solid enters the feeding cylinder 11;

[0089] After the feeding cylinder 11 of the second feeding channel 1 is filled with solids, the solid hopper valve 14 is closed;

[0090] Open the liquid flow channel valve 15 and the high-pressure gas valve 16 of the third feeding channel 1. The solid enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31, forming a solid-liquid-gas three-phase flow.

[0091] Close the liquid flow valve 15 and the high-pressure gas valve 16 of the fourth feeding channel 1, and some fluid remains in the feeding cylinder 11, as shown in FIG. Figure 7 As shown, at this time, the liquid flow channel valve 15 and the high-pressure gas valve 16 of the first feeding channel 1 are closed, all valves of the second and fourth feeding channels 1 are closed, the solid hopper valve 14 of the third feeding channel 1 is closed, and the air compressor 41 continues to work;

[0092] S6: After the feeding cylinder 11 of the first feeding channel 1 is filled with solids, the solid hopper valve 14 is closed;

[0093] Open the liquid flow channel valve 15 and the high-pressure gas valve 16 of the second feeding channel 1. The solid enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31, forming a solid-liquid-gas three-phase flow.

[0094] Close the liquid flow valve 15 and the high-pressure gas valve 16 of the third feeding channel 1, and some fluid remains in the feeding cylinder 11;

[0095] Open the solid hopper valve 14 of the fourth feeding channel 1, the solid enters the feeding cylinder 11, and the overflow fluid overflows through the overflow pipe 13. Figure 8 As shown, at this time, all valves of the first and third feeding channels 1 are closed, the solid hopper valve 14 of the second feeding channel 1 is closed, the liquid flow channel valve 15 and the high-pressure gas valve 16 of the fourth feeding channel 1 are closed, and the air compressor 41 continues to work;

[0096] S7: Open the liquid flow channel valve 15 and the high-pressure gas valve 16 of the first feeding channel 1. The solid enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31, forming a solid-liquid-gas three-phase flow;

[0097] Close the liquid flow valve 15 and the high-pressure gas valve 16 of the second feeding channel 1, and some fluid remains in the feeding cylinder 11;

[0098] Open the solid hopper valve 14 of the third feeding channel 1, the solid enters the feeding cylinder 11, and the overflow fluid overflows through the overflow pipe 13;

[0099] After the feeding cylinder 11 of the fourth feeding channel 1 is filled with solids, the solid hopper valve 14 is closed. Figure 9 As shown, at this time, the solid hopper valve 14 of the first feeding channel 1 is closed, all valves of the second and fourth feeding channels 1 are closed, the liquid flow channel valve 15 and the high-pressure gas valve 16 of the third feeding channel 1 are closed, and the air compressor 41 continues to work;

[0100] S8: Close the liquid flow valve 15 and the high-pressure gas valve 16 of the first feeding channel 1, and some fluid remains in the feeding cylinder 11;

[0101] Open the solid hopper valve 14 of the second feeding channel 1, the solid enters the feeding cylinder 11, and the overflow fluid overflows through the overflow pipe 13;

[0102] After the feeding cylinder 11 of the third feeding channel 1 is filled with solids, the solid hopper valve 14 is closed;

[0103] Open the liquid flow valve 15 and the high-pressure gas valve 16 of the fourth feeding channel 1. The solid enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31, forming a solid-liquid-gas three-phase flow. Figure 10 As shown, at this time, all valves of the first and third feeding channels 1 are closed, the liquid flow channel valve 15 and the high-pressure gas valve 16 of the second feeding channel 1 are closed, the solid hopper valve 14 of the fourth feeding channel 1 is closed, and the air compressor 41 continues to work;

[0104] S9: Open the solid hopper valve 14 of the first feeding channel 1, the solid enters the feeding cylinder 11, and the overflow fluid overflows through the overflow pipe 13;

[0105] After the feeding cylinder 11 of the second feeding channel 1 is filled with solids, the solid hopper valve 14 is closed;

[0106] Open the liquid flow channel valve 15 and the high-pressure gas valve 16 of the third feeding channel 1. The solid enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31, forming a solid-liquid-gas three-phase flow.

[0107] Close the liquid flow valve 15 and high-pressure gas valve 16 of the fourth feeding channel 1. Some fluid remains in the feeding barrel 11. At this time, the liquid flow valve 15 and high-pressure gas valve 16 of the first feeding channel 1 are closed, all valves of the second and fourth feeding channels 1 are closed, and the solid hopper valve 14 of the third feeding channel 1 is closed. The air compressor 41 continues to operate.

[0108] S10: After the feeding cylinder 11 of the first feeding channel 1 is filled with solids, the solid hopper valve 14 is closed;

[0109] Open the liquid flow channel valve 15 and the high-pressure gas valve 16 of the second feeding channel 1. The solid enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31, forming a solid-liquid-gas three-phase flow.

[0110] Close the liquid flow valve 15 and the high-pressure gas valve 16 of the third feeding channel 1, and some fluid remains in the feeding cylinder 11;

[0111] The solid hopper valve 14 of the fourth feeding channel 1 is opened, and the solid enters the feeding barrel 11. The overflow fluid overflows through the overflow pipe 13. At this time, all valves of the first and third feeding channels 1 are closed, the solid hopper valve 14 of the second feeding channel 1 is closed, and the liquid flow channel valve 15 and high-pressure air valve 16 of the fourth feeding channel 1 are closed. The air compressor 41 continues to operate;

[0112] S11: Continuously cycle according to the working conditions of steps S7 to S10;

[0113] S12: When it is necessary to stop working, the motor 22 and all valves of all feeding channels 1 are closed. At this time, the air compressor 41 continues to work;

[0114] S13: Open the liquid flow channel valves 15 and high-pressure air valves 16 of all feeding channels 1. The solid in the feeding cylinder 11 enters the flow channel 31 under the combined action of the high-pressure airflow and the fluid flushing in the flow channel 31.

[0115] The solid hopper valves 14 of all feeding channels 1 remain closed, and the air compressor 41 continues to operate;

[0116] S14: Close the liquid flow valve 15, high-pressure gas valve 16 and air compressor 41 of all feeding channels 1. At this time, the equipment stops running.

Claims

1. A device for continuously adding solids and gases to a flowing liquid, characterized in that: The main structure includes a plurality of feeding channels connected in series and a solid supply mechanism, a liquid supply mechanism and a gas supply mechanism respectively connected thereto; The main structure of the feeding channel includes a feeding barrel and a solid feeding port, a liquid feeding port and a gas feeding port opened on it. The solid feeding port is provided with an overflow pipe with a filter and a solid hopper valve, the liquid feeding port is provided with a liquid flow channel valve, and the gas feeding port is provided with a high-pressure air pipe with a high-pressure air valve. The solid hopper valve, liquid flow channel valve and high-pressure air valve are electrically connected to the valve controller respectively.

2. A device for continuously adding solids and gases to a flowing liquid according to claim 1, characterized in that: The main structure of the solid supply mechanism includes a solid storage tank, a motor arranged therein, and a solid hopper connected thereto. The solid storage tank and the solid hopper are connected via a solid feeding barrel.

3. The device for continuously adding solids and gases to a flowing liquid according to claim 2, characterized in that: The main structure of the liquid supply mechanism includes a flow channel.

4. The device for continuously adding solids and gases to a flowing liquid according to claim 3, characterized in that: The main structure of the gas supply mechanism includes an air compressor and a high-pressure gas pipeline connected thereto, and a pressure gauge is provided on the high-pressure gas pipeline.

5. The device for continuously adding solids and gases to a flowing liquid according to claim 4, characterized in that: The feeding channel is connected to the solid supply mechanism through a solid hopper; the feeding channel is connected to the liquid supply mechanism through a flow channel; and the feeding channel is connected to the gas supply mechanism through a high-pressure gas pipe and a high-pressure gas transmission pipe.

6. The device for continuously adding solids and gases to a flowing liquid according to claim 5, characterized in that: When using, First, the front end of the flow channel is connected to the liquid supply device, and the rear end is connected to the erosion corrosion test device by welding, flange connection or mechanical connection; Then, the motor is turned on to continuously add the solid stored in the solid storage tank from the solid storage tank to the solid feeding cylinder, so that the solid passes through the solid feeding cylinder and enters the solid hopper; At the same time, the air compressor is turned on to compress the air or other gas into high-pressure gas, and the high-pressure gas is supplied to the feeding channel through the high-pressure gas pipeline. During the gas transmission process, the pressure gauge monitors the pressure of the high-pressure gas in the high-pressure gas pipeline; Finally, the solid, gas and liquid in the flow channel are mixed to form a uniform solid-liquid-gas three-phase flow, which is supplied to the erosion corrosion test device.

7. The device for continuously adding solids and gases to a flowing liquid according to claim 1, characterized in that: The four feeding channels are connected in parallel, with the top connected to the solid supply mechanism, the bottom connected to the liquid supply mechanism, and the top connected to the gas supply mechanism; The main structure of the feeding channel includes a feeding barrel, a filter, an overflow pipe, a solid hopper valve, a liquid flow channel valve, a high-pressure air valve, a high-pressure air pipe and a valve controller; the top of the feeding barrel is provided with an overflow pipe with a filter and a solid hopper valve, the bottom is provided with a liquid flow channel valve, and the top is provided with a high-pressure air pipe with a high-pressure air valve. The solid hopper valve, liquid flow channel valve and high-pressure air valve are electrically connected to the valve controller respectively, and the solid hopper valve, liquid flow channel valve and high-pressure air valve are all electrically controlled butterfly valves or electrically controlled ball valves, which are opened and closed under the control of the valve controller; The main structure of the solid supply mechanism includes a solid storage tank, a motor, a solid hopper and a solid feeding barrel; a motor is provided inside the solid storage tank, which is connected to the solid hopper through the solid feeding barrel; The main structure of the liquid supply mechanism includes a flow channel, one end of the flow channel is connected to the liquid supply device, and the other end is connected to the erosion corrosion test device; The main structure of the gas supply mechanism includes an air compressor, a high-pressure gas pipeline and a pressure gauge; the air compressor is connected to the high-pressure gas pipeline, and the high-pressure gas pipeline is provided with a pressure gauge; The feeding channel is connected to the solid feeding mechanism through a solid hopper; The feeding channel is connected to the liquid supply mechanism through a flow channel; The feeding channel is connected with the gas supply mechanism through a high-pressure gas pipe and a high-pressure gas transmission pipe.

8. The device for continuously adding solids and gases to a flowing liquid according to claim 7, characterized in that: The process of use includes the following steps: S1: Add solids to the solid storage tank, start the motor, and transport the solids to the solid hopper; S2: Open the solid hopper valves of the third and fourth feeding channels, and the solids enter the feeding barrel; S3: After the feeding cylinders of the third and fourth feeding channels are filled with solids, close the solid hopper valve; S4: Open the solid hopper valve of the second feeding channel, and the solid enters the feeding barrel; Open the liquid flow channel valve and high-pressure gas valve of the fourth feeding channel. The solid enters the flow channel under the combined action of the high-pressure airflow and the fluid flushing in the flow channel, forming a solid-liquid-gas three-phase flow. S5: Open the solid hopper valve of the first feeding channel, and the solid enters the feeding barrel; After the feeding cylinder of the second feeding channel is filled with solids, close the solid hopper valve; Open the liquid flow channel valve and high-pressure gas valve of the third feeding channel. The solid enters the flow channel under the combined action of the high-pressure airflow and the fluid flushing in the flow channel, forming a solid-liquid-gas three-phase flow. Close the liquid flow valve and high-pressure gas valve of the fourth feeding channel, and some fluid remains in the feeding cylinder; S6: After the feeding cylinder of the first feeding channel is filled with solids, the solid hopper valve is closed; Open the liquid flow channel valve and high-pressure gas valve of the second feeding channel. The solid enters the flow channel under the combined action of the high-pressure airflow and the fluid flushing in the flow channel, forming a solid-liquid-gas three-phase flow. Close the liquid flow valve and high-pressure gas valve of the third feeding channel, and some fluid remains in the feeding cylinder; Open the solid hopper valve of the fourth feeding channel, solids enter the feeding cylinder, and the overflow fluid overflows through the overflow pipe; S7: Open the liquid flow channel valve and high-pressure gas valve of the first feeding channel. The solid enters the flow channel under the combined action of the high-pressure airflow and the fluid flushing in the flow channel, forming a solid-liquid-gas three-phase flow. Close the liquid flow valve and high-pressure gas valve of the second feeding channel, and some fluid remains in the feeding cylinder; Open the solid hopper valve of the third feeding channel, the solid enters the feeding cylinder, and the overflow fluid overflows through the overflow pipe; After the feeding cylinder of the fourth feeding channel is filled with solids, close the solid hopper valve; S8: Close the liquid flow valve and high-pressure gas valve of the first feeding channel, and some fluid remains in the feeding cylinder; Open the solid hopper valve of the second feeding channel, the solid enters the feeding cylinder, and the overflow fluid overflows through the overflow pipe; After the feeding cylinder of the third feeding channel is filled with solids, close the solid hopper valve; Open the liquid flow channel valve and high-pressure gas valve of the fourth feeding channel. The solid enters the flow channel under the combined action of the high-pressure airflow and the fluid flushing in the flow channel, forming a solid-liquid-gas three-phase flow. S9: Open the solid hopper valve of the first feeding channel, the solid enters the feeding cylinder, and the overflow fluid overflows through the overflow pipe; After the feeding cylinder of the second feeding channel is filled with solids, close the solid hopper valve; Open the liquid flow channel valve and high-pressure gas valve of the third feeding channel. The solid enters the flow channel under the combined action of the high-pressure airflow and the fluid flushing in the flow channel, forming a solid-liquid-gas three-phase flow. Close the liquid flow valve and high-pressure gas valve of the fourth feeding channel, and some fluid remains in the feeding cylinder; S10: After the feeding cylinder of the first feeding channel is filled with solids, the solid hopper valve is closed; Open the liquid flow channel valve and high-pressure gas valve of the second feeding channel. The solid enters the flow channel under the combined action of the high-pressure airflow and the fluid flushing in the flow channel, forming a solid-liquid-gas three-phase flow. Close the liquid flow valve and high-pressure gas valve of the third feeding channel, and some fluid remains in the feeding cylinder; Open the solid hopper valve of the fourth feeding channel, solids enter the feeding cylinder, and the overflow fluid overflows through the overflow pipe; S11: Continuously cycle according to the working conditions of steps S7 to S10; S12: When it is necessary to stop working, close the motor and all valves of all feeding channels; S13: Open the liquid flow valves and high-pressure air valves of all feeding channels, and the solid in the feeding cylinder enters the flow channel under the combined action of the high-pressure air flow and the fluid flushing in the flow channel; Keep the solids hopper valves of all feeding channels closed; S: Close the liquid flow valves, high-pressure air valves and air compressors of all feeding channels.

9. A device for continuously adding solids and gases to a flowing liquid according to any one of claims 5 to 8, characterized in that: The addition amount of solid, liquid and gas is controlled respectively by controlling the switching time of the solid hopper valve, liquid flow channel valve and high-pressure gas valve.

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