Test device for coal powder leakage

Abstract

The utility model provides a test device for coal powder leakage, which includes: a tank body, the tank body has a feed port, a discharge port and a cavity, the feed port is arranged at the top of the tank body, the discharge port is arranged at the bottom of the tank body, the feed port and the discharge port are both connected to the cavity, and the cavity is used to place non-combustible solid particles; a heating part, used to heat the non-combustible solid particles in the cavity; a driving part, arranged corresponding to the discharge port, and the driving part is used to eject the non-combustible solid particles from the discharge port. The technical solution provided by the utility model can solve the problem of large errors in the existing technology when verifying the accuracy of coal powder leakage monitoring system monitoring coal powder leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine safety, in particular to a testing device for coal powder leakage. Background Art

[0002] At present, most coal transportation pipelines in coal chemical plants are inspected manually, which often fails to find leakage points in time and is greatly affected by bad weather and nighttime environment. In order to find leakage points in coal pulverized pipelines in time, eliminate hidden dangers, and ensure the safe operation of coal chemical gasification plants, coal chemical and related enterprises have installed coal pulverized leakage monitoring systems or are developing coal pulverized leakage monitoring equipment and systems.

[0003] The existing or under-development coal powder leakage monitoring systems are usually tested in the laboratory. The method of dumping solid particles is often used to verify the coal powder leakage monitoring system. This method cannot fully simulate the coal powder leakage form and process, and the temperature of the solid particles cannot be guaranteed during the dumping process. It cannot be pressurized, and it cannot simulate the temperature and pressure of the pipeline when the coal powder leaks. This will cause a large error in the accuracy of the coal powder leakage monitoring system when it is actually working on the field. Utility Model Content

[0004] The utility model provides a testing device for coal powder leakage, so as to solve the problem of large error when verifying the accuracy of coal powder leakage monitoring system in the prior art.

[0005] The utility model provides a testing device for coal powder leakage, which comprises: a tank body, the tank body having a feed port, a discharge port and a cavity, the feed port being arranged at the top of the tank body, the discharge port being arranged at the bottom of the tank body, the feed port and the discharge port being communicated with the cavity, and the cavity being used for placing non-combustible solid particles; a heating part, used for heating the non-combustible solid particles in the cavity; and a driving part, arranged corresponding to the discharge port, and used for spraying the non-combustible solid particles out of the discharge port.

[0006] Furthermore, the heating part comprises a heating pipeline, the heating pipeline is at least partially arranged in the cavity, and the inlet of the heating pipeline is used to communicate with the low-pressure steam pipeline.

[0007] Furthermore, the heating pipeline located in the cavity is arranged around the inner wall of the cavity.

[0008] Furthermore, a temperature sensor is arranged in the cavity, and the temperature sensor is used to detect the temperature of the non-combustible solid particles in the cavity.

[0009] Furthermore, a flow control valve is arranged on the heating pipeline upstream of the cavity.

[0010] Furthermore, the driving part includes a driving pipeline and a nozzle, the driving pipeline, the discharge port and the nozzle are connected in sequence, and the inlet of the driving pipeline is used to communicate with the instrument air pipeline to provide wind power to the driving pipeline through the instrument air pipeline.

[0011] Furthermore, a pressure reducing filter is provided on the driving pipeline, and the pressure reducing filter is used to adjust the wind pressure of the driving pipeline.

[0012] Furthermore, a switch valve is also provided on the driving pipeline, and the switch valve is located between the tank body and the pressure reducing filter.

[0013] Furthermore, the tank body includes a heating section and a discharging section which are connected in sequence along the height direction, the heating pipeline is arranged in the heating section, the discharging section is used to store the heated solid particles, and the bottom of the discharging section is connected to the discharging port.

[0014] Furthermore, a guide section is arranged in the cavity, and the guide section is arranged between the heating section and the discharge section. The flow area of ​​the guide section gradually decreases from the heating section to the discharge section.

[0015] By applying the technical solution of the utility model, non-combustible solid particles are used instead of coal powder to be placed in the tank body, thereby avoiding the risk of explosion when using coal powder for testing. The non-combustible solid particles in the cavity are then heated by the heating unit to simulate the temperature of the coal powder when it is transported in the pipeline. The heated non-combustible solid particles are then ejected from the discharge port by the driving unit. With such an arrangement, the leakage process and form of the coal powder at the pipeline leakage point can be fully restored through the cooperation of the heating unit and the driving unit, so as to test and verify the coal powder leakage monitoring system, greatly reduce the error when verifying the coal powder leakage monitoring system, and improve the accuracy of the coal powder leakage monitoring system in monitoring coal powder leakage during actual field work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 The schematic diagram of the structure of the testing device provided by the utility model is shown.

[0018] The above drawings include the following reference numerals:

[0019] 10. Tank body; 11. Feed inlet; 12. Discharge outlet; 13. Cavity; 14. Heating section; 15. Discharge section; 16. Guide section;

[0020] 20. Heating pipeline;

[0021] 30. Driving pipeline; 31. Switch valve; 32. Pressure reducing filter;

[0022] 40. Nozzle. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] like Figure 1 As shown, an embodiment of the utility model provides a test device for coal powder leakage, which includes a tank body 10, a heating unit and a driving unit. The tank body 10 has a feed port 11, a discharge port 12 and a cavity 13. The feed port 11 is arranged at the top of the tank body 10, and the discharge port 12 is arranged at the bottom of the tank body 10. The feed port 11 and the discharge port 12 are both connected to the cavity 13, and the cavity 13 is used to place non-combustible solid particles. The heating unit is used to heat the non-combustible solid particles in the cavity 13. The driving unit is arranged corresponding to the discharge port 12, and the driving unit is used to spray the non-combustible solid particles from the discharge port 12.

[0025] By applying the technical solution of the utility model, non-combustible solid particles are used instead of coal powder to be placed in the tank body 10, so as to avoid the risk of explosion when using coal powder for testing. Then, the non-combustible solid particles in the cavity 13 are heated by the heating unit to simulate the temperature of the coal powder when it is transported in the pipeline. Then, the heated non-combustible solid particles are ejected from the discharge port 12 by the driving unit. With such an arrangement, through the cooperation of the heating unit and the driving unit, the leakage process and form of the coal powder at the pipeline leakage point can be fully restored, so as to test and verify the coal powder leakage monitoring system, greatly reduce the error when verifying the coal powder leakage monitoring system, and improve the accuracy of the coal powder leakage monitoring system in monitoring coal powder leakage during actual field work.

[0026] In the present application, the non-combustible solid particles may be diatomaceous earth or sulfur dioxide. The above materials are light in texture, fine in powder quality, close to coal powder and cost-effective. In one embodiment of the present application, the heating unit may be gas heating, water bath heating or electric heating, as long as the non-combustible solid can be heated. In another embodiment of the present application, the driving unit may be an elastic system, an electric system or a pneumatic system, as long as it can provide a driving force for the non-combustible solid to be ejected from the discharge port.

[0027] Furthermore, the heating unit includes a heating pipeline 20, which is at least partially arranged in the cavity 13, and the inlet of the heating pipeline 20 is used to communicate with the low-pressure steam pipeline. The heating pipeline 20 is connected with the low-pressure high-temperature steam pipeline at the work site, and the high-temperature steam is used as a heat source to heat the non-combustible solid particles in the cavity 13, so that the environmental value of the heated non-combustible solid particles can be closer to the environmental value when the actual coal powder leaks, and there is no need to set up other heating equipment, thereby reducing the test cost. In other embodiments of the present application, the heating pipeline 20 can also pass a heat medium to heat the non-combustible solid particles.

[0028] Specifically, the heating pipeline 20 located in the cavity 13 is wound on the inner wall of the cavity 13. Through the above arrangement, the contact area between the heating pipeline 20 and the tank body 10 can be increased, and the temperature of the tank body 10 can be avoided from being too low, so that the tank body 10 has a certain thermal insulation performance. At the same time, the contact with the non-combustible solid particles is more sufficient, so that the non-combustible solid particles can be fully heated, so that the solid particles are heated more evenly, and the heating effect of the heating part is improved. And the heating pipeline 20 is arranged in this way without occupying too much space inside the cavity 13, avoiding affecting the placement of non-combustible solid particles in the cavity 13. In this embodiment, the heating pipeline 20 is spirally coiled on the inner wall of the cavity 13, and the number of layers of the coiling is not limited. In other embodiments, the heating pipeline 20 can also be bent and passed through the cavity 13.

[0029] Among them, a temperature sensor is arranged in the cavity 13, and the temperature sensor is used to detect the temperature of the non-combustible solid particles in the cavity 13. Such arrangement facilitates real-time observation of the temperature of the non-combustible solid particles, avoids a large difference between the temperature of the heated non-combustible solid particles and the actual temperature of the coal powder during transportation, and makes the simulated environmental value during the test more realistic. In other embodiments, the heating temperature of the non-combustible solid particles can also be measured by using an infrared temperature measuring gun to penetrate into the cavity 13.

[0030] In the present application, a flow control valve is provided on the heating pipeline 20 upstream of the cavity 13. It is used in conjunction with the temperature sensor in the cavity 13 to observe the temperature value on the temperature sensor, and then the flow of high-temperature low-pressure steam in the heating pipeline 20 is controlled by the flow control valve, so that the temperature of the non-combustible solid particles in the cavity 13 reaches the simulation value faster, thereby improving the heating efficiency of the heating part, and the flow control valve can be closed when the non-combustible solid particles reach the required temperature.

[0031] Among them, the driving part includes a driving pipeline 30 and a nozzle 40, and the driving pipeline 30, the discharge port 12 and the nozzle 40 are connected in sequence. The inlet of the driving pipeline 30 is used to communicate with the instrument air pipeline to provide wind power to the driving pipeline 30 through the instrument air pipeline. Through the above-mentioned arrangement, the heating pipeline 20 is connected with the instrument air pipeline at the work site, and the wind is used as a power source to provide driving force for the non-combustible solid particles in the cavity 13, so that the shape of the non-combustible solid particles when sprayed from the nozzle 40 is closer to the shape of the actual coal powder leakage, and there is no need to set up other power equipment, which further reduces the test cost. In other embodiments of the present application, the inlet of the driving pipeline 30 can also be connected to the fan.

[0032] Specifically, a pressure reducing filter 32 is provided on the driving pipeline 30, and the pressure reducing filter 32 is used to adjust the wind pressure of the driving pipeline 30. By setting the pressure reducing filter 32, the wind pressure inside the driving pipeline 30 can be observed and adjusted to avoid the internal wind pressure being too small or too large, which is too different from the environmental value during the actual transportation of coal powder, affecting the accuracy of the test. At the same time, the pressure reducing filter 32 can also filter the gas in the driving pipeline 30 to prevent impurities in the gas from entering the cavity 13 and affecting the test effect.

[0033] Furthermore, a switch valve 31 is also provided on the driving pipeline 30, and the switch valve 31 is located between the tank body 10 and the pressure reducing filter 32, so that after opening the switch valve 31, the adjusted wind pressure and filtered gas can be directly and quickly passed into the tank body 10. By setting the switch valve 31, the opening and closing of the driving pipeline 30 can be controlled. When the non-combustible solid particles are heated, the switch valve 31 is in a closed state. When the non-combustible solid particles are heated, the switch valve 31 is opened, and the adjusted and filtered gas can be used to provide driving force for the heated non-combustible solid particles to be sprayed out from the nozzle 40.

[0034] In the present application, the tank body 10 includes a heating section 14 and a discharge section 15 connected in sequence along the height direction. The heating pipeline 20 is arranged in the heating section 14, which can heat the non-combustible solid particles that have just entered the cavity 13 in a concentrated and rapid manner. The discharge section 15 is used to store the heated solid particles. The bottom of the discharge section 15 is connected to the discharge port 12, so that the heated non-combustible solid particles can be ejected from the discharge port 12. Among them, the tank body 10 also has a cover plate, which is arranged at the feed port 11 and is used to open or close the feed port 11. The cover plate is opened when feeding and closed when heating to ensure the internal temperature of the cavity 13.

[0035] Among them, a guide section 16 is also arranged in the cavity 13, and the guide section 16 is arranged between the heating section 14 and the discharge section 15. The flow area of ​​the guide section 16 gradually decreases from the heating section 14 to the discharge section 15. Such an arrangement avoids the structure of the discharge section 15 being too large, and it is difficult to observe and adjust the state and position of the non-combustible solid particles when they are ejected. The guide section 16 can guide the flow of the heated non-combustible solid particles so that they enter the discharge section 15 faster.

[0036] Specifically, a handle is provided on the outside of the tank body 10, which is convenient for the operator to hold and adjust the position where the non-combustible solid particles are sprayed. A heat preservation and insulation layer can also be provided on the outside of the tank body 10, which can not only keep the temperature of the cavity 13 inside the tank body 10 warm, but also prevent the temperature of the tank body 10 from being too high, causing burns to the operator. Specifically, the heat preservation and insulation layer can be provided as cotton felt, which is convenient for disassembly and assembly, and saves production costs.

[0037] Compared with the prior art, the testing device provided by the utility model has the following beneficial effects:

[0038] 1. Use non-combustible media such as diatomaceous earth and SiO2 to simulate coal powder, and the simulated leakage process is safe and reliable;

[0039] 2. The instrument air and low-pressure steam at the coal chemical gasification unit can be used to fully simulate the coal transportation pressure and temperature of different pulverized coal pipelines, which is more in line with the actual leakage state of pulverized coal;

[0040] 3. Testing and verification can be carried out on actual equipment or on site, which is of great significance for the verification and acceptance of the coal powder leakage monitoring system.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0043] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0045] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0046] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A testing device for coal powder leakage, characterized in that: The testing device comprises: A tank body (10), the tank body (10) comprising a feed inlet (11), a discharge outlet (12) and a cavity (13), the feed inlet (11) being arranged at the top of the tank body (10), the discharge outlet (12) being arranged at the bottom of the tank body (10), the feed inlet (11) and the discharge outlet (12) both being in communication with the cavity (13), and the cavity (13) being used for placing non-combustible solid particles; A heating unit, used for heating the non-combustible solid particles in the cavity (13); A driving unit is arranged corresponding to the discharge port (12), and the driving unit is used to spray the non-combustible solid particles out of the discharge port (12).

2. The testing device according to claim 1, characterized in that: The heating part comprises a heating pipeline (20), wherein the heating pipeline (20) is at least partially arranged in the cavity (13), and an inlet of the heating pipeline (20) is used to communicate with a low-pressure steam pipeline.

3. The testing device according to claim 2, characterized in that: The heating pipeline (20) located in the cavity (13) is arranged around the inner wall of the cavity (13).

4. The testing device according to claim 3, characterized in that: A temperature sensor is arranged in the cavity (13), and the temperature sensor is used to detect the temperature of the non-combustible solid particles in the cavity (13).

5. The testing device according to claim 3, characterized in that: A flow control valve is provided on the heating pipeline (20) upstream of the cavity (13).

6. The testing device according to claim 1, characterized in that: The driving part comprises a driving pipeline (30) and a nozzle (40); the driving pipeline (30), the discharge port (12) and the nozzle (40) are connected in sequence; the inlet of the driving pipeline (30) is used to be connected with an instrument air pipeline so as to provide wind power to the driving pipeline (30) through the instrument air pipeline.

7. The testing device according to claim 6, characterized in that: The driving pipeline (30) is provided with a pressure reducing filter (32), and the pressure reducing filter (32) is used to adjust the wind pressure of the driving pipeline (30).

8. The testing device according to claim 7, characterized in that: The driving pipeline (30) is also provided with a switch valve (31), and the switch valve (31) is located between the tank body (10) and the pressure reducing filter (32).

9. The testing device according to claim 3, characterized in that: The tank body (10) comprises a heating section (14) and a discharge section (15) which are connected in sequence along a height direction; the heating pipeline (20) is arranged in the heating section (14); the discharge section (15) is used to store the heated solid particles; and the bottom of the discharge section (15) is connected to the discharge port (12).

10. The testing device according to claim 9, characterized in that: A guide section (16) is also provided in the cavity (13). The guide section (16) is provided between the heating section (14) and the discharge section (15). The flow area of ​​the guide section (16) gradually decreases in a direction from the heating section (14) to the discharge section (15).

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