Coal water slurry sampler and sampling method

Abstract

The coal water slurry sampler is connected with a coal water slurry header pipe and comprises a first sampling pipeline, a second sampling pipeline, a sampling valve, a buffer sampling tank and a flushing water pipe, the buffer sampling tank comprises a tank main body, the tank main body is provided with a containing cavity, and the two ends of the first sampling pipeline are connected with the coal water slurry header pipe and the sampling valve respectively; two ends of the second sampling pipeline are respectively connected with the sampling valve and the buffer sampling tank, the flushing water pipe is connected with the second sampling pipeline through a movable joint, and the flushing water pipe is used for flushing the second sampling pipeline to prevent the second sampling pipeline from being blocked. In this way, high-pressure clear water can be introduced to clean the second sampling pipeline, the coal water slurry deposited on the inner wall of the second sampling pipeline is removed, blockage caused by deposition of the coal water slurry is avoided, the manual operation frequency and the safety risk can be reduced, splashing caused when the coal water slurry is dredged can be prevented, and then waste of the coal water slurry is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of coal slurry samplers, and in particular to a water-coal slurry sampler and a sampling method. Background Art

[0002] At present, during the use of water-coal slurry samplers, the sampling tube is easily blocked due to the poor local fluidity and easy sedimentation of water-coal slurry. In order to clear the blocked pipe section in the existing technology, it is necessary to manually use a stick to clear it, which will cause the water-coal slurry to splash, resulting in resource waste and environmental pollution. Summary of the Invention

[0003] The present invention provides a water-coal slurry sampler and a sampling method, so as to solve the problem of water-coal slurry splashing caused by the dredging method in the prior art.

[0004] In order to solve the above problems, according to one aspect of the present invention, the present invention provides a water-coal slurry sampler, which is connected to the water-coal slurry main pipe, including a first sampling pipeline, a second sampling pipeline, a sampling valve, a buffer sampling tank and a flushing water pipe. The buffer sampling tank includes a tank body, the tank body has a accommodating cavity, the two ends of the first sampling pipeline are respectively connected to the water-coal slurry main pipe and the sampling valve, the two ends of the second sampling pipeline are respectively connected to the sampling valve and the buffer sampling tank, the flushing water pipe is connected to the second sampling pipeline through a flexible joint, and the flushing water pipe is used to flush the second sampling pipeline to prevent the second sampling pipeline from being blocked.

[0005] Furthermore, the buffer sampling tank also includes an annular flushing water pipe, which is arranged at the upper part of the accommodating cavity and is used to flush the water-coal slurry remaining in the buffer sampling tank.

[0006] Furthermore, the annular flushing water pipe has a plurality of water outlet holes, and the plurality of water outlet holes are evenly arranged on the side wall of the annular flushing water pipe along the circumference of the annular flushing water pipe.

[0007] Furthermore, the buffer sampling tank also includes a third sampling pipeline, which is connected to the bottom of the accommodating cavity. A removable sampling container is provided at the lower end of the third sampling pipeline, and the water-coal slurry flows into the sampling container from the third sampling pipeline.

[0008] Furthermore, the water-coal slurry sampler also includes a dredging ball valve and a dredging rod. The dredging ball valve is connected to the buffer sampling tank. The dredging rod can be inserted into the dredging ball valve to dredge the buffer sampling tank when it is blocked.

[0009] Furthermore, the buffer sampling tank also includes a top cover, which is used to close the opening at the upper end of the accommodating cavity.

[0010] Furthermore, the buffer sampling tank also includes a gasket, which is arranged between the top cover and the tank body.

[0011] Furthermore, the water-coal slurry sampler also includes a fastener, and the top cover and the tank body are connected by the fastener.

[0012] Furthermore, the water-coal slurry sampler also includes a collection tank, which is arranged below the third sampling pipeline and is used to collect the flushed water-coal slurry.

[0013] According to another aspect of the present invention, a sampling method is provided. The sampling method is used for the above-mentioned water-coal slurry sampler, and the sampling method comprises:

[0014] Step S1, opening the sampling valve to allow the water-coal slurry to flow from the water-coal slurry main pipe through the first sampling pipeline, the sampling valve, and the second sampling pipeline into the buffer sampling tank, and then flow out through the third sampling pipeline connected to the bottom of the buffer sampling tank to collect samples;

[0015] Step S2: close the sampling valve, open the flushing water pipe, and flush the second sampling pipeline to prevent the water-coal slurry from clogging the second sampling pipeline;

[0016] Step S3: Open the annular flushing water pipe on the top of the buffer sampling tank to flush the buffer sampling tank to prevent the coal water slurry from remaining in the buffer sampling tank and affecting subsequent sample data;

[0017] Step S4: Close the flushing water pipe and the annular flushing water pipe, and the sampling is completed;

[0018] Among them, when the second sampling pipeline is blocked, open the flexible joint at the connection between the flushing water pipe and the second sampling pipeline for cleaning; when the buffer sampling tank is blocked, clean it through the unblocking ball valve connected to the buffer sampling tank and the unblocking rod used in conjunction with the unblocking ball valve, or directly open the top cover of the buffer sampling tank for cleaning.

[0019] By applying the technical solution of the present invention, a buffer sampling tank with a accommodating cavity is provided, which can not only serve as a temporary storage for samples, but also balance the pressure fluctuation of the water-coal slurry at the moment of sampling, avoid the splashing phenomenon caused by the water-coal slurry directly entering the sampling container at high speed, and reduce the risk of environmental pollution and sample loss; and by providing a flushing water pipe connected to the second sampling pipeline and realizing flexible connection through a flexible joint structure, when the water-coal slurry sampler finishes sampling or reaches a predetermined time, high-pressure clean water can be introduced to clean the second sampling pipeline to remove the water-coal slurry deposited on the inner wall of the second sampling pipeline, and avoid blockage caused by water-coal slurry deposition. This can reduce the frequency of manual operations and safety risks, and can also prevent splashing caused by unblocking the water-coal slurry, thereby avoiding waste of water-coal slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 A schematic structural diagram of a water-coal slurry sampler provided by an embodiment of the present invention is shown;

[0022] Figure 2 Shown Figure 1 Schematic diagram of the structure of the middle ring flushing water pipe.

[0023] The above drawings include the following reference numerals:

[0024] 10. Coal-water slurry main pipe;

[0025] 20. The first sampling line;

[0026] 30. Second sampling line;

[0027] 40. Sampling valve;

[0028] 50. Buffer sampling tank; 51. Tank body; 511. Accommodation cavity;

[0029] 52. Annular flushing water pipe; 521. Water outlet; 53. Top cover;

[0030] 60. Flush the water pipes;

[0031] 70. The third sampling line;

[0032] 80. Unblock the ball valve;

[0033] 90. Fasteners. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0035] like Figures 1 to 2As shown, an embodiment of the present invention provides a water-coal slurry sampler, which is connected to the water-coal slurry main pipe 10, and includes a first sampling pipeline 20, a second sampling pipeline 30, a sampling valve 40, a buffer sampling tank 50 and a flushing water pipe 60. The buffer sampling tank 50 includes a tank body 51, and the tank body 51 has a accommodating cavity 511. The two ends of the first sampling pipeline 20 are respectively connected to the water-coal slurry main pipe 10 and the sampling valve 40, and the two ends of the second sampling pipeline 30 are respectively connected to the sampling valve 40 and the buffer sampling tank 50. The flushing water pipe 60 is connected to the second sampling pipeline 30 through a flexible joint. The flushing water pipe 60 is used to flush the second sampling pipeline 30 to prevent the second sampling pipeline 30 from being blocked.

[0036] In this embodiment, a buffer sampling tank 50 with a accommodating cavity 511 is provided, which can not only serve as a temporary storage for samples, but also balance the pressure fluctuation of the water-coal slurry at the moment of sampling, avoid the splashing phenomenon caused by the water-coal slurry directly entering the sampling container at high speed, and reduce the risk of environmental pollution and sample loss; and by providing a flushing water pipe 60 connected to the second sampling pipeline 30, and realizing flexible connection through a flexible joint structure, when the water-coal slurry sampler finishes sampling or reaches a predetermined time, high-pressure clean water can be introduced to clean the second sampling pipeline 30, remove the water-coal slurry deposited on the inner wall of the second sampling pipeline 30, and avoid blockage caused by water-coal slurry deposition, which can reduce the frequency of manual operations and safety risks, and can also prevent splashing caused by unblocking the water-coal slurry, thereby avoiding waste of water-coal slurry.

[0037] The length of the first sampling line 20 is set to be less than or equal to 50 mm, which can keep the water-coal slurry in the first sampling line 20 moist and prevent the water-coal slurry from drying and agglomerating in the first sampling line 20. The water pressure in the water washing pipe needs to be greater than or equal to 0.5 MPa, which can ensure that the residual water-coal slurry in the second sampling line 30 is flushed away.

[0038] like Figure 1 As shown, the buffer sampling tank 50 also includes an annular flushing water pipe 52, which is arranged at the upper part of the receiving chamber 511. The annular flushing water pipe 52 is used to flush the residual water-coal slurry in the buffer sampling tank 50, and can achieve full coverage spray cleaning of the inner wall of the entire receiving chamber 511 to prevent water-coal slurry deposition. It can also ensure that the interior of the receiving chamber 511 is clean each time sampling is performed, and there will be no residual water-coal slurry from the previous time that affects the sampling results. In addition, the annular water pipe structure can spray evenly 360 degrees, avoiding dead corners during cleaning and ensuring that the entire receiving chamber 511 can be cleaned.

[0039] like Figure 2As shown, the annular flushing water pipe 52 has multiple water outlet holes 521, and the multiple water outlet holes 521 are evenly arranged on the side wall of the annular flushing water pipe 52 along the circumference of the annular flushing water pipe 52, so that the sprayed water flow can form a uniform water curtain, which can cover the 360° area of ​​the inner wall of the tank body 51, prevent the existence of a single-sided flushing dead angle, and improve the overall cleaning effect.

[0040] like Figure 1 As shown, the buffer sampling tank 50 also includes a third sampling pipeline 70, which is connected to the bottom of the accommodating cavity 511. A removable sampling container is provided at the lower end of the third sampling pipeline 70, and the water-coal slurry flows into the sampling container from the third sampling pipeline 70.

[0041] In this embodiment, by providing a third sampling line 70 connected to the bottom of the buffer sampling tank 50, the water-coal slurry in the tank body 51 is discharged naturally by gravity after settling, without the need for pressurized discharge. This simple structure, coupled with the fact that the water-coal slurry enters the sampling container directly through the third sampling line 70, can prevent sample splashing and pipeline stagnation that are common in traditional sample collection methods, thereby avoiding sample contamination and waste. Furthermore, the provision of a removable sampling container allows operators to complete sample collection and labeling by simply removing the container, reducing labor intensity.

[0042] like Figure 1 As shown, the water-coal slurry sampler also includes a clearing ball valve 80 and a clearing rod. The clearing ball valve 80 is connected to the buffer sampling tank 50. The clearing rod can be inserted into the clearing ball valve 80 to clear the buffer sampling tank 50 when it is blocked. When the flushing water pressure of the flushing water pipe 60 and the annular flushing water pipe 52 is insufficient, the water-coal slurry may not be completely discharged, forming a blockage in the pipeline. At this time, the clearing ball valve 80 can be opened and the clearing rod can be inserted into the clearing ball valve 80 for manual clearing, thereby improving the emergency performance of the water-coal slurry sampler.

[0043] like Figure 1 As shown, the buffer sampling tank 50 also includes a top cover 53, which is used to seal the opening at the upper end of the receiving chamber 511. This prevents the internal coal water slurry from splashing, splashing, or leaking, while also blocking the release of odors and harmful volatiles. It also prevents foreign matter such as dust, impurities, rainwater, and insects from entering the receiving chamber 511, ensuring the accuracy of the coal water slurry sample composition and improving sample reliability. The top cover 53, in conjunction with the tank body 51, forms a closed shell structure, which also enhances the overall rigidity of the buffer sampling tank 50 and improves its pressure-bearing capacity. This prevents deformation, cracking, or liquid ejection from the upper end of the receiving chamber when the coal water slurry generates pressure fluctuations or shocks.

[0044] Furthermore, the buffer sampling tank 50 also includes a gasket, which is arranged between the top cover 53 and the tank body 51, which can better form a seal to prevent water-coal slurry leakage or gas escape, and can also prevent external impurities from entering the tank body 51 to avoid affecting the accuracy of the sample.

[0045] like Figure 1 As shown, the water-coal slurry sampler further includes a fastener 90, and the top cover 53 is connected to the tank body 51 by the fastener 90. During the sampling process, the buffer sampling tank 50 may experience internal pressure fluctuations, liquid impact, operation vibration, etc. The fastener 90 can firmly fix the top cover 53 on the interface of the tank body 51, thereby avoiding water-coal slurry leakage, environmental pollution or safety accidents caused by loose connection;

[0046] Furthermore, the water-coal slurry sampler also includes a collection tank, which is arranged below the third sampling pipeline 70 and is used to collect the water-coal slurry after flushing. In the process of flushing the second sampling pipeline 30 or the third sampling pipeline 70, a large amount of water-coal slurry residual liquid is flushed out with the water. The corresponding collection device can prevent the water-coal slurry from accumulating on the ground, reduce environmental pollution caused by liquid splashing, and improve the cleanliness and tidiness of the overall working environment.

[0047] Among them, the material of all pipelines is 20 steel, and the welding method adopts SMAW / GTAW to ensure that the inner walls of all pipelines are smooth and no water-coal slurry residue will be left.

[0048] The embodiment of the present invention also includes a sampling method, which is used for the above-mentioned water-coal slurry sampler, and the sampling method includes:

[0049] Step S1: Open the sampling valve 40 to allow the coal water slurry to flow from the coal water slurry main pipe 10 through the first sampling line 20, the sampling valve 40, and the second sampling line 30 into the buffer sampling tank 50, and then flow out through the third sampling line 70 connected to the bottom of the buffer sampling tank 50 to collect samples;

[0050] Step S2: close the sampling valve 40, open the flushing water pipe 60, and flush the second sampling pipeline 30 to prevent the water-coal slurry from clogging the second sampling pipeline 30;

[0051] Step S3: Open the annular flushing water pipe 52 on the top of the buffer sampling tank 50 to flush the buffer sampling tank 50 to prevent the coal water slurry from remaining in the buffer sampling tank 50 and affecting subsequent sample data;

[0052] Step S4: close the flushing water pipe 60 and the annular flushing water pipe 52, and the sampling is completed;

[0053] Among them, when the second sampling pipeline 30 is blocked, the flexible joint at the connection between the flushing water pipe 60 and the second sampling pipeline 30 is opened for cleaning; when the buffer sampling tank 50 is blocked, it is cleaned through the unblocking ball valve 80 connected to the buffer sampling tank 50 and the unblocking rod used in conjunction with the unblocking ball valve 80, or the top cover 53 of the buffer sampling tank 50 is directly opened for cleaning.

[0054] This sampling method ensures the accuracy and safety of the sampling process through a series of sampling and flushing steps, improves the accuracy of sampling data and the safety of the sampling process, and reduces the waste of water-coal slurry. In addition, this sampling method also provides emergency measures. When the pipeline is blocked, the corresponding emergency measures can be used to clear the pipeline, ensuring that the sampling work can be carried out continuously and smoothly.

[0055] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. Persons skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0056] 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, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0057] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of this solution. 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 actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the techniques, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary, rather than limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0058] In the description of this scheme, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this scheme and simplifying the description. Unless otherwise stated, 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. Therefore, they cannot be understood as limiting the scope of protection of this scheme; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0059] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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.

[0060] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this solution.

Claims

1. A water-coal slurry sampler connected to a water-coal slurry main pipe (10), characterized in that: The invention comprises a first sampling pipeline (20), a second sampling pipeline (30), a sampling valve (40), a buffer sampling tank (50) and a flushing water pipe (60), wherein the buffer sampling tank (50) comprises a tank body (51), the tank body (51) having a receiving cavity (511), the two ends of the first sampling pipeline (20) are respectively connected to the water-coal slurry main pipe (10) and the sampling valve (40), the two ends of the second sampling pipeline (30) are respectively connected to the sampling valve (40) and the buffer sampling tank (50), the flushing water pipe (60) is connected to the second sampling pipeline (30) through a flexible joint, and the flushing water pipe (60) is used to flush the second sampling pipeline (30) to prevent the second sampling pipeline (30) from being blocked.

2. The coal-water slurry sampler according to claim 1, characterized in that: The buffer sampling tank (50) further comprises an annular flushing water pipe (52), which is arranged at the upper portion of the accommodating cavity (511) and is used for flushing the water-coal slurry remaining in the buffer sampling tank (50).

3. The coal-water slurry sampler according to claim 2, characterized in that: The annular flushing water pipe (52) has a plurality of water outlet holes (521), and the plurality of water outlet holes (521) are evenly arranged on the side wall of the annular flushing water pipe (52) along the circumference of the annular flushing water pipe (52).

4. The coal-water slurry sampler according to claim 1, characterized in that: The buffer sampling tank (50) further comprises a third sampling pipeline (70), the third sampling pipeline (70) being in communication with the bottom of the accommodating cavity (511), a removable sampling container being provided at the lower end of the third sampling pipeline (70), and the water-coal slurry flowing from the third sampling pipeline (70) into the sampling container.

5. The coal-water slurry sampler according to claim 1, characterized in that: The water-coal slurry sampler further comprises a dredging ball valve (80) and a dredging rod, wherein the dredging ball valve (80) is connected to the buffer sampling tank (50), and the dredging rod can be inserted into the dredging ball valve (80) for dredging when the buffer sampling tank (50) is blocked.

6. The coal-water slurry sampler according to claim 1, characterized in that: The buffer sampling tank (50) further comprises a top cover (53), and the top cover (53) is used to close the opening at the upper end of the accommodating cavity (511).

7. The coal-water slurry sampler according to claim 6, characterized in that: The buffer sampling tank (50) further comprises a gasket, which is arranged between the top cover (53) and the tank body (51).

8. The coal-water slurry sampler according to claim 6, characterized in that: The water-coal slurry sampler further comprises a fastener (90), and the top cover (53) and the tank body (51) are connected via the fastener (90).

9. The coal-water slurry sampler according to claim 4, characterized in that: The water-coal slurry sampler further comprises a collecting tank, which is arranged below the third sampling pipeline (70) and is used to collect the flushed water-coal slurry.

10. A sampling method, characterized in that: The sampling method is used for the water-coal slurry sampler according to any one of claims 1 to 9, and the sampling method comprises: Step S1, opening the sampling valve (40), allowing the water-coal slurry to flow from the water-coal slurry main pipe (10) through the first sampling pipeline (20), the sampling valve (40), and the second sampling pipeline (30) into the buffer sampling tank (50), and then flow out through the third sampling pipeline (70) connected to the bottom of the buffer sampling tank (50), to collect samples; Step S2, closing the sampling valve (40), opening the flushing water pipe (60), and flushing the second sampling pipeline (30) to prevent the water-coal slurry from clogging the second sampling pipeline (30); Step S3, opening the annular flushing water pipe (52) on the top of the buffer sampling tank (50) to flush the buffer sampling tank (50) to prevent the coal water slurry from remaining in the buffer sampling tank (50) and affecting subsequent sample data; Step S4, closing the flushing water pipe (60) and the annular flushing water pipe (52), and completing the sampling; Wherein, when the second sampling pipeline (30) is blocked, the flexible joint at the connection between the flushing water pipe (60) and the second sampling pipeline (30) is opened for cleaning; when the buffer sampling tank (50) is blocked, it is cleaned through the unblocking ball valve (80) connected to the buffer sampling tank (50) and the unblocking rod used in conjunction with the unblocking ball valve (80), or the top cover (53) of the buffer sampling tank (50) is directly opened for cleaning.

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