CN115704758A - Online sampling device and detection method for content of solid particles in liquid-carrying feed gas - Google Patents
Online sampling device and detection method for content of solid particles in liquid-carrying feed gas Download PDFInfo
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- CN115704758A CN115704758A CN202110924243.4A CN202110924243A CN115704758A CN 115704758 A CN115704758 A CN 115704758A CN 202110924243 A CN202110924243 A CN 202110924243A CN 115704758 A CN115704758 A CN 115704758A
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- 238000005070 sampling Methods 0.000 title claims abstract description 127
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- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 63
- 239000002994 raw material Substances 0.000 claims abstract description 11
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- 238000000034 method Methods 0.000 claims description 12
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Abstract
The invention provides an online sampling device for the content of solid particles in liquid-carrying feed gas, which has the advantages of strong sampling representativeness, low separation equipment cost and small volume, and also provides an online detection method for the content of the solid particles in the liquid-carrying feed gas, which has high detection accuracy, and relates to the technical field of natural gas solid particle content measurement. Carry liquid feed gas in solid particulate matter content's online sampling device, set up the sample pipeline on the trunk line including separator and bypass, the sample pipeline includes that the whirl that sets gradually along the feed gas flow direction generates pipeline section, whirl stable tube section and sample pipeline section, be equipped with in the whirl generation pipeline section and make the feed gas through the whirl generation pipeline section produce the guide vane of spiral flow, be equipped with in the sample pipeline section and hug closely in the liquid intaking pipe of the inner wall of sample pipeline section, the liquid intaking pipe with the separator is connected. The invention improves the accuracy of on-line measurement of the solid particle amount of the raw material gas and keeps low-cost sampling.
Description
Technical Field
The invention relates to the technical field of natural gas solid particle content measurement, in particular to an online sampling device and a detection method for solid particle content in liquid-carrying feed gas.
Background
At present, in the development of natural gas, particularly shale gas and dense gas reservoirs, a hydraulic reinforced solid particle fracturing method is used on a large scale, and in the production of gas wells, raw gas flow necessarily contains more solid particles and liquid. Solid particle removing equipment is usually arranged at a natural gas well station and a platform to remove solid particle gravel in raw gas so as to ensure safe and stable operation of downstream equipment and a gathering pipeline. In the process of gathering and transporting natural gas with high sulfur content, with the change of conditions such as pressure, temperature and the like, elemental sulfur dissolved in the gas may be separated out in a solid particle form in a gathering and transporting pipeline and generate migration and deposition, which can cause sulfur blockage in a ground gathering and transporting pipeline, cause corrosion of steel and finally influence the normal transportation of the gas. Therefore, the method is especially important for accurately detecting the content of the solid particles in the liquid-carrying feed gas, establishing a safe and effective method for preventing erosion of solid particle gravel, taking effective 'blockage removing' measures in time, evaluating the solid particle removing capacity of various solid particle removing separation equipment in the actual production environment, and optimizing and forming a reasonable and stable gathering and transportation system operation system.
In current solid particle content testing sampling technique, can divide into usually that to carry out whole separation sampling with the direct access separator of feed gas main pipeline and set up the sampling tube at the feed gas main pipeline and carry out partial sampling test two kinds. The first mode needs to be matched with efficient and stable complete separation equipment for use, has the defects of large equipment and high cost, and is less used. The second mode is that a sampling pipe is arranged on the main pipeline and is connected with a separator, during sampling, the sampling pipe is shunted from the main pipeline to obtain a certain amount of sampling gas and sends the sampling gas into the separator, the separator separates solid phase in the sampling gas, the mass of the solid is measured, and the solid content in the gas can be obtained by comparing the mass of the solid with the amount of the sampling gas. The method has the advantages of small equipment volume and low cost, and is mainly suitable for gas without liquid. Because the gas phase, the liquid phase and the solid phase in the solid-particle-containing liquid-carrying feed gas are mixed unevenly in the main pipe, in the method, the component proportion of a fluid sample (sampling gas) obtained by shunting and taken out is different from the component of the fluid in the main pipe to a certain extent, namely: the sampling is not representative enough, resulting in poor detection accuracy.
Disclosure of Invention
The invention aims to solve the first technical problem of providing an online sampling device for the content of solid particles in liquid-carrying feed gas, which has strong sampling representativeness, low separation equipment cost and small volume.
The second technical problem to be solved by the invention is to provide an on-line detection method for the content of solid particles in the liquid-carrying raw material gas, which has high detection accuracy.
The technical scheme adopted by the invention for solving the technical problems is as follows: the online sampling device for the content of the solid particles in the liquid-carrying feed gas comprises a separator and a sampling pipeline arranged on a main pipeline in a bypass mode, wherein one end of the sampling pipeline is connected with the upstream of the main pipeline through a first valve, and the other end of the sampling pipeline is connected with the downstream of the main pipeline through a second valve;
a third valve is arranged on the main pipeline and positioned between the first valve and the second valve;
sample pipeline includes that the whirl generates pipeline section, whirl stable tube section and the sample pipeline section that sets gradually along the feed gas flow direction, be equipped with in the whirl generates the feed gas that the pipeline section through the whirl produces the guide vane of spiral flow, be equipped with in the sample pipeline section and hug closely the liquid taking pipe in the inner wall of sample pipeline section, the liquid taking pipe with the separator is connected.
Further, the sampling pipeline is horizontally arranged.
Further, the inlet of the liquid taking pipe is in a fan-shaped ring shape, and the outer diameter of the inlet of the liquid taking pipe is the same as the inner diameter of the rotational flow generating pipe section.
Furthermore, the liquid taking pipes are distributed uniformly along the circumferential direction of the sampling pipe section.
Furthermore, a filter screen is arranged in the rotational flow stabilizing pipe section, the filter screen is installed in the rotational flow stabilizing pipe section through supporting, and a space is arranged between the filter screen and the pipe wall of the rotational flow stabilizing pipe section to form a liquid-solid phase channel.
Furthermore, a plurality of guide plates for weakening tangential velocity of spiral flow are arranged in the liquid-solid phase channel, the liquid-solid phase channel is divided into a plurality of spiral liquid-solid phase channel units by the guide plates, and spiral rising angles between the liquid-solid phase channel units are consistent.
Further, the distance between the pipe orifice of the liquid taking pipe and the liquid-solid phase communication channel is less than or equal to 30mm.
Furthermore, an air outlet of the separator is communicated with the sampling pipeline after passing through the fourth valve and the one-way valve in sequence.
Furthermore, a pressure regulating valve which is convenient for the airflow at the air outlet of the separator to flow back into the sampling pipeline is arranged on the sampling pipeline.
The online detection method for the content of the solid particles in the liquid-carrying raw material gas adopts the online sampling device for the content of the solid particles in the liquid-carrying raw material gas, and comprises the following steps:
closing the third valve, cutting off the main pipeline, opening the first valve and the second valve to enable the feed gas in the main pipeline to pass through the sampling pipeline, generating spiral flow by means of guide vanes when the feed gas passes through the sampling pipeline, and forming a liquid-solid phase mixing layer on the inner wall of the sampling pipeline section;
taking a liquid-solid phase sample from the liquid-solid phase mixing layer by using a liquid taking pipe according to a sampling proportion coefficient k and sampling time t, and sending the liquid-solid phase sample into a separator to separate solid particles;
measuring the mass of the solid particles;
and calculating the solid particle content of the feed gas according to the mass of the solid particles, the sampling proportionality coefficient K, the sampling time t and the flow Q of the feed gas.
The beneficial effects of the invention are: the on-line sampling device and the detection method of the invention generate spiral flow for the feed gas through the guide vanes, thereby forming a liquid-solid phase mixing layer on the inner wall of a sampling pipe section, then sample a certain liquid-solid phase sample according to a sampling proportion through the liquid taking pipe, send the sample into the separator, separate solid particles, and finally calculate the content of the solid particles in the feed gas through the mass of the solid particles.
Drawings
FIG. 1 is a schematic diagram of the structure of an on-line sampling device of the present invention;
FIG. 2 is a schematic view of the structure of a sampling pipe;
FIG. 3 isbase:Sub>A cross-sectional view taken along A-A of FIG. 1;
FIG. 4 isbase:Sub>A cross-sectional view taken along A-A of FIG. 1;
FIG. 5 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 6 is a schematic diagram comparing the inlet of the liquid take-off tube being square and the inlet being fan-ring shaped;
shown in the figure: the device comprises a main pipeline 1, a sampling pipeline 2, a separator 4, a first valve 5, a second valve 6, a fourth valve 7, a one-way valve 8, a pressure regulating valve 9, a third valve 11, a cyclone generation pipe section 21, a cyclone stabilization pipe section 22, a sampling pipe section 23, a guide vane 211, a filter screen 221, a support 222, a guide plate 224, a liquid taking pipe 231, a liquid-solid phase mixing layer 232, a center line 233 and a liquid-solid phase channel unit 2231.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the drawings.
As shown in fig. 1 and fig. 2, the on-line sampling device for the content of solid particles in liquid-carrying raw material gas of the present invention comprises a separator 4 and a sampling pipe 2 arranged on a main pipe 1 in a bypass manner, wherein one end of the sampling pipe 2 is connected with the upstream of the main pipe 1 through a first valve 5, and the other end is connected with the downstream of the main pipe 1 through a second valve 6. A third valve 11 is arranged on the main pipeline 1, and the third valve 11 is positioned between the first valve 5 and the second valve 6; sampling pipe 2 includes that the whirl that sets gradually along the feed gas flow direction generates pipeline section 21, whirl stable tube section 22 and sampling pipe section 23, be equipped with in the whirl generates the feed gas that pipeline section 21 is generated to the whirl and produce the guide vane 211 of spiral flow, guide vane 211 makes the feed gas spiral forward flow, and under the centrifugal action of spiral flow, heavier solid particle thing in the feed gas, liquid stream are peripheral to can form liquid solid phase mixture layer 232 (by the annular of solid particle thing, liquid constitution) at the inner wall of sampling pipe 2. A liquid taking pipe 231 tightly attached to the inner wall of the sampling pipe section 23 is arranged in the sampling pipe section 23, and the liquid taking pipe 231 is connected with the separator 4.
When the device is used for sampling, the third valve 11 on the main pipeline is closed, the first valve 5 and the second valve 6 are opened, and all the feed gas passes through the sampling pipeline 2. When the feed gas passes through the swirl generation pipe section 21, a helical flow is generated under the action of the guide vanes 211, and the feed gas flows forwards in a helical manner. Under the centrifugal action of the spiral flow, heavier solid particles in the feed gas flow to the periphery, so that a liquid-solid phase mixed layer 232 (annular flow consisting of the solid particles and the liquid) is formed on the inner wall of the sampling pipeline 2. The spiral flow can receive the influence of guide vane 211 wake when leaving guide vane 211, can be in unstable state in certain distance, leads to liquid solid phase to mix layer 232 unstable enough, if the reposition of redundant personnel sample liquid solid phase mix the layer this moment, can influence the detection accuracy, consequently is equipped with the stable pipeline section 22 of whirl of certain length between sample pipeline section 23 and whirl generation pipeline section 21 and makes the spiral flow steady gradually. After the spiral flow is stabilized, a stable liquid-solid phase mixed layer 232 is formed on the inner wall of the sampling pipe section 23, and solid particle particles in the middle gas phase are hardly detected. Therefore, it is considered that the content of the solid particles in the gas can be more accurately obtained by taking out a sample of a stable ratio by dividing only the liquid-solid mixed layer 232, measuring the mass of the solid particles in the sample, and comparing the measured mass with the amount of the sample gas based on the separation ratio. Namely: a certain proportion of sample is taken out from the liquid-solid phase mixed layer 232 through a liquid taking pipe 231 and sent into a separator 4 to separate solid particles, the mass of the solid particles is measured, and the solid particles and the amount of the sample gas are compared according to the separation proportion to obtain the content of the solid particles in the gas. The device adopts and samples after the phase splitting to the feed gas, and the sample representativeness is stronger, and only need take out a small amount of liquid-solid phase mixture can reach the strong purpose of sample representativeness, and the ability that handles is separated to the separator requires lowly, and splitter is small and with low costs. When sampling is not needed, the first valve 5 and the second valve 6 are closed, and the third valve 11 is opened. It is understood that the nozzle of the liquid taking pipe 231 is arranged in the direction opposite to the flowing direction of the liquid-solid phase mixed layer 232 so as to take out the solid particles.
The specific length of the swirl stabilizing pipe section 22 can be obtained through experiments according to actual conditions; the specific arrangement of the guide vanes 211 is the same as that of the swirl generator, such as: patent CN200910022760.1. Of course, the swirl generating tube section 21 can also be formed in the manner of a swirl generator which is directly mounted on the sampling pipe 2.
The sampling pipe 2 may be arranged horizontally, vertically upwards or vertically downwards. When the sampling pipeline 2 is vertically arranged upwards, backflow is easily generated in the sampling pipeline 2, and the stability of the liquid-solid phase mixing layer 232 is affected; when the sampling pipe 2 is disposed vertically downward, the liquid-solid mixed layer 232 is greatly affected by gravity, and for this reason, it is preferable that the sampling pipe 2 be disposed horizontally in consideration of the above.
The inlet of the liquid extraction pipe 231 has a radial height h in the sampling pipe section 23 which is greater than or equal to the thickness of the liquid-solid phase mixing layer 232. The liquid extraction tubes 231 may be one or more, preferably more, and are uniformly distributed along the circumference of the sampling tube section 23. Therefore, sampling is more representative, and the detection accuracy can be further improved. In the embodiment of the present invention, there are 4 liquid extraction tubes 231.
The extraction ratio of the liquid extraction pipe 231 from the liquid-solid mixed layer 232 is equal to the ratio of the effective solid particle extraction area of the pipe orifice of the liquid extraction pipe 231 to the cross-sectional area of the liquid-solid mixed layer 232. The effective solid particle extraction area of the nozzle of the liquid extraction pipe 231 is the area of the nozzle of the liquid extraction pipe 231 extending into the liquid-solid phase mixed layer 232 (the black shaded part in fig. 5).
The inlet of the liquid withdrawal tube may be of various shapes, such as: circular, square, trapezoidal, fan-shaped, etc. Because under the centrifugal action, in the radial direction of the sampling pipe section 23, the solid particles in the liquid-solid phase mixing layer 232 are unevenly distributed, the solid particles on the outer side are more, and the solid particles on the inner side are less, as shown in fig. 6, it can be known that the inlet of the liquid taking pipe 231 is a fan-shaped ring and the inlet of the liquid taking pipe 231 is a square (dotted line): the sampling area (ratio) of the square shape along the radial direction inward of the sampling pipe section 23 is gradually increased, the center line 233 of the inlet of the liquid taking pipe 231 is taken as the center, the sampling ratio at the inner side of the center line 233 is increased, and the sampling ratio at the outer side of the center line 233 is reduced, so that the problem that the liquid-solid mixed layer 232 cannot be sampled in equal proportion in the radial direction of the sampling pipe section exists, certain influence can be exerted on the sampling representativeness, and the measured solid particle content is smaller than the actual solid particle content. The same problems exist when the liquid taking pipe adopts a round structure, a trapezoidal structure and the like. For this reason, in order to further improve the sampling representativeness, it is preferable that the inlet of the liquid extraction pipe 231 has a fan-shaped ring shape, and the outer diameter of the inlet (fan-shaped ring shape) of the liquid extraction pipe 231 is the same as the inner diameter of the swirl flow generating pipe section 21. Thus, the problem that the liquid-solid mixed layer 232 cannot be sampled in an equal proportion in the radial direction of the sampling pipe section can be solved.
Specific of solid particulate matter content in feed gasAnd (3) calculating: assuming that the number of the liquid taking pipes 231 is 1, the central angle α of the inlet (fan-shaped) of the liquid taking pipe 231 is 6 °, the sampling proportionality coefficient K =1/60, the mass of the solid particulate matters separated by the separation device is measured as M, the sampling time is time t, and the flow rate of the feed gas is measured as Q (which can be measured by a flow meter on the main pipeline), the content S of the solid particulate matters in the feed gas is:
in order to further ensure that the liquid phase in the feed gas flows forwards along the pipe wall so as to improve the representative effect of split-flow sampling, a filter screen 221 is arranged in the rotational flow stabilizing pipe section 22 in the invention to capture the liquid drops in the gas phase fluid. Specifically, the filter screen 221 is installed in the swirl stabilized pipe section 22 through the support 222, and a space is provided between the filter screen 221 and the pipe wall of the swirl stabilized pipe section 22 to form a liquid-solid phase channel 223 for the liquid-solid phase mixed layer to pass through, so as to prevent the filter screen from influencing the flow of the liquid-solid phase mixed layer 232. The height of the liquid-solid phase channel 223 should be greater than the thickness of the liquid-solid phase mixture layer.
In order to enable solid particulate matters in feed gas to be centrifugally separated on the pipe wall, the tangential velocity (along the circumferential motion velocity) of the spiral flow passing through the guide vanes is high, if the tangential velocity of the flow is not reduced, the flow can generate high impact on the protruding part of the liquid taking pipe opening, the stability of the flow is greatly adversely affected, and the representativeness of split-flow sampling can be reduced. To further improve the sampling representativeness, a plurality of baffles 224 for weakening the tangential velocity of the spiral flow are arranged in the liquid-solid communication channel 223, the baffles 224 are spirally arranged in the liquid-solid communication channel 223, the liquid-solid communication channel 223 is divided into a plurality of spiral liquid-solid communication channel units 2231, and the spiral angle between the liquid-solid communication channel units 2231 is consistent. The baffles 224 function as a flow guide and the helix angle can be determined experimentally, and the specific number of baffles 224 can be any number greater than or equal to 2. The deflector 224 of the present invention also serves as the support 222 for the filter screen 221. After the guide plate 224 is arranged, since the liquid-solid phase mixing layer 232 passes through the liquid-solid phase channel 223, the stability of the liquid-solid phase mixing layer is reduced along with the increase of the distance from the liquid-solid phase channel 223, and if the distance between the pipe opening of the liquid taking pipe 231 and the liquid-solid phase channel 223 is too large, the sampling representativeness is affected. For this reason, the distance between the opening of the liquid extraction tube 231 and the baffle plate 224 is as small as possible, specifically, less than or equal to 30mm.
The separator 4 is an existing separator, such as: gravity separators, centrifugal separators, and the like. In the process of sampling, the liquid taking pipe 231 can flow a part of gas out of the liquid taking pipe 231, so that the gas enters the liquid taking pipe 231, and if the gas is directly discharged, the environment pollution can be caused. In order to prevent environmental pollution, in the figure, the air outlet of the separator 4 is communicated with the sampling pipeline 2 after passing through the fourth valve 7 and the one-way valve 8 in sequence. The non-return valve 8 serves to prevent gas in the sampling pipe 2 from flowing back to the separator 4. When the exhaust is needed, the fourth valve 7 is opened to return the airflow in the separator 4 to the sampling pipeline 2.
The sampling pipeline 2 of the invention is provided with a pressure regulating valve 9 which is convenient for the airflow at the air outlet of the separator 4 to flow back into the sampling pipeline 2. A pressure regulating valve 9 is arranged downstream the take-off pipe 231 to ensure that there is a pressure difference between the inlet end of the take-off pipe 231 and the outlet end of the separator 4, thereby facilitating the withdrawal of the gas escaping from the take-off pipe 231.
The invention also provides an online detection method for the content of solid particles in liquid-carrying feed gas, which adopts the online sampling device, and the detection method comprises the following steps:
step one, closing a third valve 11, cutting off a main pipeline 1, opening a first valve 5 and a second valve 6, enabling feed gas in the main pipeline 1 to pass through a sampling pipeline 2, generating spiral flow by means of guide vanes 211 in the process that the feed gas passes through the sampling pipeline 2, and forming a liquid-solid phase mixing layer 232 on the inner wall of a sampling pipe section 23;
step two, taking a liquid-solid phase sample from the liquid-solid phase mixing layer 232 by using the liquid taking pipe 231 according to the sampling proportion k and the sampling time t, and sending the liquid-solid phase sample into the separator 4 to separate solid particles;
measuring the mass M of the solid particles;
step four, according to the mass of the solid particles, the sampling proportion K, the sampling time t and the raw materialsCalculating the solid particle content S of the feed gas by the gas flow Q,
wherein Q may be measured by a flow meter on the main conduit.
The sampling proportionality coefficient is equal to the ratio of the effective solid particle extraction area of the nozzle of the liquid extraction pipe 231 to the cross-sectional area of the liquid-solid mixed layer 232. The effective solid particle area of getting of the mouth of pipe of liquid intaking pipe 231 is the area that the mouth of pipe of liquid intaking pipe 231 stretches into liquid solid phase mixing layer 232.
The method comprises the steps of cutting off a main pipeline, enabling a raw material gas to pass through a sampling pipeline 2, enabling the raw material gas to generate spiral flow in the process of passing through a guide vane 211, forming a liquid-solid phase mixing layer 232 on the inner wall of a sampling pipe section 23, sampling a certain liquid-solid phase sample according to a sampling proportion k through a liquid taking pipe 231, sending the liquid-solid phase sample into a separator 4, separating solid particles, and finally calculating the content of the solid particles in the raw material gas according to the quality of the solid particles.
Claims (10)
1. Carry on the online sampling device of solid particle content in the liquid feed gas, its characterized in that: the device comprises a separator (4) and a sampling pipeline (2) which is arranged on a main pipeline (1) in a bypass mode, wherein one end of the sampling pipeline (2) is connected with the upstream of the main pipeline (1) through a first valve (5), and the other end of the sampling pipeline is connected with the downstream of the main pipeline (1) through a second valve (6);
a third valve (11) is arranged on the main pipeline (1), and the third valve (11) is positioned between the first valve (5) and the second valve (6);
sample pipeline (2) include along feed gas flow direction whirl generation pipeline section (21), whirl stable tube section (22) and sample pipeline section (23) that set gradually, be equipped with in whirl generation pipeline section (21) and make feed gas through whirl generation pipeline section (21) produce guide vane (211) of spiral flow, be equipped with in sample pipeline section (23) and hug closely in liquid taking pipe (231) of the inner wall of sample pipeline section (23), liquid taking pipe (231) with separator (4) are connected.
2. The on-line sampling device for the content of solid particles in a liquid-carrying feed gas as recited in claim 1, wherein: the sampling pipeline (2) is horizontally arranged.
3. The on-line sampling device for the content of solid particles in a liquid-carrying feed gas as recited in claim 1, wherein: the inlet of the liquid taking pipe (231) is in a fan-shaped ring shape, and the outer diameter of the inlet of the liquid taking pipe (231) is the same as the inner diameter of the swirl generating pipe section (21).
4. An on-line sampling device for the content of solid particles in a liquid-carrying feed gas as claimed in claim 1, 2 or 3, wherein: the liquid taking pipes (231) are distributed uniformly along the circumference of the sampling pipe section (23).
5. The apparatus for on-line sampling of the content of solid particles in a liquid-carrying feed gas of claim 1, wherein: be equipped with filter screen (221) in whirl stable tube section (22), filter screen (221) are installed in whirl stable tube section (22) through supporting (222), be equipped with the interval in order to form liquid solid phase passageway (223) between the pipe wall of filter screen (221) and whirl stable tube section (22).
6. The on-line sampling device for the content of solid particles in a liquid-carrying feed gas as recited in claim 5, wherein: a plurality of guide plates (224) for weakening the tangential velocity of the spiral flow are arranged in the liquid-solid phase channel (223), the guide plates (224) divide the liquid-solid phase channel (223) into a plurality of spiral liquid-solid phase channel units (2231), and the spiral angles of the liquid-solid phase channel units (2231) are consistent.
7. The on-line sampling device of solid particulate content in a liquid-carrying feed gas as recited in claim 6, wherein: the distance between the pipe orifice of the liquid taking pipe (231) and the liquid-solid communication channel (223) is less than or equal to 30mm.
8. The on-line sampling device for the content of solid particles in a liquid-carrying feed gas as recited in claim 1, wherein: and the air outlet of the separator (4) is communicated with the sampling pipeline (2) after passing through the fourth valve (7) and the one-way valve (8) in sequence.
9. The on-line sampling device for the content of solid particles in a liquid-carrying feed gas as recited in claim 8, wherein: and a pressure regulating valve (9) which is convenient for the airflow at the air outlet of the separator (4) to flow back into the sampling pipeline (2) is arranged on the sampling pipeline (2).
10. The on-line detection method for the content of solid particles in liquid-carrying feed gas is characterized by comprising the following steps: the on-line sampling device for the content of solid particles in the liquid-carrying raw material gas as claimed in any one of claims 1 to 9 is adopted, and the detection method comprises the following steps:
closing the third valve (11), cutting off the main pipeline (1), opening the first valve (5) and the second valve (6) to enable the raw material gas in the main pipeline (1) to pass through the sampling pipeline (2), generating spiral flow by means of the guide vanes (211) in the process that the raw material gas passes through the sampling pipeline (2), and forming a liquid-solid phase mixing layer (232) on the inner wall of the sampling pipe section (23);
taking a liquid-solid phase sample from the liquid-solid phase mixing layer (232) by using a liquid taking pipe (231) according to a sampling proportion coefficient k and sampling time t, and sending the liquid-solid phase sample into a separator (4) to separate solid particles;
measuring the mass of the solid particles;
and calculating the solid particle content of the feed gas according to the mass of the solid particles, the sampling proportion coefficient K, the sampling time t and the flow Q of the feed gas.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110924243.4A CN115704758A (en) | 2021-08-12 | 2021-08-12 | Online sampling device and detection method for content of solid particles in liquid-carrying feed gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110924243.4A CN115704758A (en) | 2021-08-12 | 2021-08-12 | Online sampling device and detection method for content of solid particles in liquid-carrying feed gas |
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| CN115704758A true CN115704758A (en) | 2023-02-17 |
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| CN202110924243.4A Pending CN115704758A (en) | 2021-08-12 | 2021-08-12 | Online sampling device and detection method for content of solid particles in liquid-carrying feed gas |
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