CN212363817U - Automatic sampling and sample returning system for online detection of pulverized coal pipeline - Google Patents
Automatic sampling and sample returning system for online detection of pulverized coal pipeline Download PDFInfo
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- CN212363817U CN212363817U CN202021307283.1U CN202021307283U CN212363817U CN 212363817 U CN212363817 U CN 212363817U CN 202021307283 U CN202021307283 U CN 202021307283U CN 212363817 U CN212363817 U CN 212363817U
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Abstract
The utility model discloses an automatic sample system of returning for buggy pipeline on-line measuring belongs to the analysis and measurement technical field. The device comprises a sampling pipeline, a sample return pipeline, an air return pipeline and a cyclone separator. The sampling pipeline is provided with a sampling valve and a jet pump, the sample return pipeline is provided with a sample return valve, and the gas return pipeline is provided with a gas return valve and a gas return pump. The lower end of the cyclone separator is sequentially provided with a sampling plate and a supporting plate, the sampling plate and the supporting plate are respectively provided with a coal taking port and a through hole, a pulverized coal on-line detection device is arranged above the supporting plate, and the coal taking port moves between the through hole and the pulverized coal on-line detection device. The sampling plate is in sealing contact with the cyclone separator and the support plate. The utility model discloses automatic sample and return appearance have avoided the sample to reveal pollution and the potential safety hazard that arouses, have avoided extravagant, and the sample can not exert an influence to the solid-gas two-phase fluid of buggy pipeline, carries out on-the-spot online real-time detection, save time cost and human cost to the buggy sample.
Description
Technical Field
The utility model relates to an analytical measurement technical field especially indicates an automatic sampling system of returning appearance for buggy pipeline on-line measuring.
Background
Coal is an important component in industrial energy structures in China and is widely applied to various industries. Especially the main energy sources of thermal power generation and cement production and the main raw materials of the coal chemical industry. The accurate amount of coal (calorific value) consumption of each industry and each household energy enterprise is an important foundation for formulating national energy strategy and is also basic data for calculating and checking carbon emission of the enterprises. In order to ensure that government departments can accurately master the coal consumption quantity of China, the State administration of development and improvement and quality control jointly makes and issues a notice of an on-line energy consumption detection system popularization and construction working scheme of key energy consumption units in 2017.
Coal consumption is one aspect of energy consumption, and online measurement of coal consumption is particularly complicated. In the coal consumption on-line measuring system, the coal powder in the coal powder pipeline needs to be sampled in real time, and indexes such as ash content, volatile components, moisture and the like of the coal powder are measured in real time.
Coal-fired boilers in traditional thermal power plants, cement plants and the like generally adopt pulverized coal suspension combustion, so the fineness of coal entering the boiler is a conventional supervision project, and pulverized coal samples need to be collected and detected from a pulverized coal pipeline so as to supervise the operation condition of a boiler pulverized coal system. At present, a sampling head, an attached extraction device, a gas-powder separation device, a sample collection bottle, a necessary pipeline valve and the like are generally adopted to sample from a coal powder pipeline. During sampling, the sampling head is inserted into the pulverized coal pipeline, the obtained pulverized coal sample enters the sample collection bottle, and then the sample collection bottle is taken away and is detected through a laboratory.
The following disadvantages exist with the sampling from the coal powder pipeline by means of the sampling head:
1. the coal powder pipeline is filled with solid-gas two-phase fluid, and a sampling head (or a sampling gun, a sampling tube and the like) needs to extend into the coal powder pipeline to collect coal samples, so that the solid-gas two-phase fluid is influenced. In the coal consumption online measurement system, the volume of actually combusted pulverized coal needs to be measured in real time through solid-gas two-phase flow, and the influence of the sampling head on the solid-gas two-phase flow can cause inaccuracy in measurement of the volume of the pulverized coal, so that the sampling mode of the sampling head is not suitable for the coal consumption online measurement system.
2. The obtained coal dust sample needs to be sent into a laboratory for detection, the measurement is not carried out in real time, the real-time timeliness of the detection result is insufficient, and the indexes of the coal dust need to be measured in real time in the coal consumption online measurement system, so the sampling mode of the sampling head cannot meet the real-time requirement of the coal consumption online measurement system.
3. The coal powder in the sample collecting bottle is generally discarded and processed after the detection in the laboratory is finished, and does not return to a coal powder pipeline, so that pollution and potential safety hazards caused by leakage are avoided when the coal powder is processed, and waste is caused.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem, the utility model provides an automatic sampling system of returning a kind for buggy pipeline on-line measuring, the utility model discloses automatic sampling and returning a kind have avoided the sample to reveal pollution and the potential safety hazard that arouses, have avoided the waste, and the sample can not exert an influence to the solid-gas two-phase fluid of buggy pipeline, carries out on-the-spot online real-time detection, save time cost and human cost to the buggy sample.
The utility model provides a technical scheme as follows:
the utility model provides an automatic sample return system for buggy pipeline on-line measuring, is including setting up sample pipeline, return appearance pipeline and the return air pipeline on the buggy pipeline, wherein:
the inlet of the sampling pipeline is connected with the pulverized coal pipeline, the outlet of the sampling pipeline is connected with the inlet of the cyclone separator, a sampling valve and a jet pump are sequentially arranged on the sampling pipeline from the inlet to the outlet, and the jet pump is provided with an air inlet;
the sampling device comprises a cyclone separator, a sampling plate, a coal powder online detection device, a coal taking port, a through hole, a sampling plate and a coal powder online detection device, wherein the lower end of a solid particle outlet of the cyclone separator is provided with a sampling detection mechanism, the sampling detection mechanism comprises a supporting plate and the sampling plate tightly attached to the upper surface of the supporting plate, the coal powder online detection device is arranged above the supporting plate, the sampling plate is provided with the coal taking port, the through hole is arranged on the supporting plate and right below the solid particle outlet of the cyclone separator, the sampling plate and the supporting plate can horizontally move relative to each other, and the coal taking port moves;
the solid particle outlet of the cyclone separator is in sealing contact with the upper surface of the sampling plate, the lower surface of the sampling plate is in sealing contact with the upper surface of the supporting plate, the inlet of the sample return pipeline is in sealing connection with the lower surface of the supporting plate, the outlet of the sample return pipeline is connected with a pulverized coal pipeline, and a sample return valve is arranged on the sample return pipeline;
the inlet of the air return pipeline is connected with the air outlet of the cyclone separator, the outlet of the air return pipeline is connected with the pulverized coal pipeline, and the air return pipeline is provided with an air return valve and an air return pump.
Further, be provided with linear slide rail in the backup pad, the sampling board is installed on the linear slide rail, the sampling board is connected with linear power device, buggy on-line measuring device is located get the top of coal mouthful translation orbit.
Furthermore, the sampling plate is installed on the supporting plate through a rotating bearing, the sampling plate is connected with a rotating power device, and the pulverized coal online detection device is located above the rotating track of the coal taking port.
Furthermore, the number of the coal taking ports is multiple, and the multiple coal taking ports are distributed on a fixed radius along the rotation center.
Further, a solid particle outlet of the cyclone separator is in sealing contact with the upper surface of the sampling plate through a first soft sealing ring and a first hard sealing ring, the first soft sealing ring is positioned above the first hard sealing ring, and the first soft sealing ring is in a compressed state;
the lower surface of the sampling plate is in sealing contact with the upper surface of the supporting plate through a second soft sealing ring and a second hard sealing ring, the second soft sealing ring is positioned below the second hard sealing ring, and the second soft sealing ring is in a compressed state;
and the inlet of the sample return pipeline is hermetically connected with the lower surface of the supporting plate through a sealing ring.
Furthermore, the sections of the first soft sealing ring and the second soft sealing ring are both circular, and the sections of the first hard sealing ring and the second hard sealing ring are both rectangular.
Furthermore, a safety pipeline is arranged between the cyclone separator and the pulverized coal pipeline, and a safety valve is arranged on the safety pipeline.
Furthermore, the air return valve and the air return pump are sequentially arranged on the air return pipeline from an inlet to an outlet, the inlet of the safety pipeline is connected with the cyclone separator, and the outlet of the safety pipeline is connected with the air return pipeline between the air return pump and the pulverized coal pipeline.
Furthermore, the sample return pipeline, the sampling pipeline and the air return pipeline are sequentially arranged on the pulverized coal pipeline from bottom to top along the conveying direction of pulverized coal.
Further, the coal powder on-line detection device comprises an on-line X-ray monitoring detection device and/or an on-line infrared detection device.
The utility model discloses following beneficial effect has:
the utility model discloses from automatic sampling in the buggy pipeline, accomplish online real-time detection automatically to in the buggy pipeline is sent back to the buggy after will detecting automatically, there is not the buggy to be detained in the system outside. The utility model discloses accomplished can take a sample and can return the appearance again, avoided the sample to reveal and arouse pollution and potential safety hazard, avoided the waste. Just the utility model discloses do not have any device to stretch into in the buggy pipeline, can not exert an influence to the solid-gas two-phase fluid of buggy pipeline, be particularly useful for the sample detection of coal consumption on-line measuring system. The utility model discloses the buggy that obtains the sample carries out on-the-spot online real-time detection, has practiced thrift time cost and human cost, can satisfy the real-time requirement of coal consumption on-line measuring system.
Drawings
FIG. 1 is a schematic diagram of an automatic sampling and sample returning system for on-line detection of a pulverized coal pipeline according to the present invention;
FIG. 2 is a schematic view of an example of a sampling detection mechanism I;
FIG. 3 is a schematic view of a sampling plate in an example I;
FIG. 4 is a schematic view of a second example of a sampling detection mechanism;
FIG. 5 is a schematic view of a sampling plate according to example two;
FIG. 6 is a schematic view of the installation and sealing structure among the sampling plate, the supporting plate, the cyclone separator and the sample return pipeline.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The utility model provides an automatic sample return system for buggy pipeline on-line measuring, as shown in fig. 1-6, including setting up sampling pipeline 2, sample return pipeline 3 and return gas pipeline 4 on buggy pipeline 1, wherein:
the entry and the buggy pipeline 1 of sample pipeline 2 are connected, and the export of sample pipeline 2 and cyclone 5's entry linkage, and sample pipeline 2 is last to have set gradually sample valve 6 and jet pump 7 from the entry to the export, has air inlet 8 on the jet pump 7. An air inlet 8 of the jet pump 7 is connected with an air source of a working site, and an outlet of the jet pump 7 is connected with an air inlet of the cyclone separator 5.
The lower extreme of the solid particle export of cyclone 5 lower extreme is provided with sampling detection mechanism 9, and sampling detection mechanism 9 includes backup pad 10 and hugs closely sampling plate 11 at backup pad 10 upper surface, and backup pad 10 and sampling plate 11 are perpendicular to the solid particle export of cyclone 5 and the entry of returning appearance pipeline 3.
The coal powder on-line detection device 12 is arranged above the supporting plate 10, the coal taking port 13 is arranged on the sampling plate 11, the through hole 14 is formed in the position, right below the solid particle outlet of the cyclone separator 5, of the supporting plate 10, the sampling plate 11 can horizontally move relative to the supporting plate 10, and the coal taking port 13 moves between the position, right above the through hole 14, and the position, right below the coal powder on-line detection device 12, of the coal powder on-line detection device. Namely, the sampling plate 11 is vertical to the sample return pipeline to move horizontally, and a coal powder on-line detection device 12 is arranged in the moving direction.
The solid particle matter outlet of cyclone 5 and the upper surface sealing contact of sampling board 11, the upper surface sealing contact of the lower surface of sampling board 11 and backup pad 10, the entry of returning the appearance pipeline 3 and the lower surface sealing connection of backup pad 10, the export of returning the appearance pipeline 3 is connected with buggy pipeline 1, is provided with back appearance valve 15 on returning the appearance pipeline 3.
It is also possible to provide a small section of tubing at the lower end of the cyclone 5, which is spaced from the return tubing 3 to facilitate the mounting of the sampling plate 11 and the support plate 10. The sampling plate 11 is a flat plate, which is provided with an opening (i.e. a coal taking port 13, the coal taking port 13 is a through hole) matching with the inner diameter of the sample return pipeline, and is transversely inserted into the gap. During sampling, the coal taking port 13 of the sampling plate 11 is filled with coal powder, and the coal powder is taken out of the coal powder online detection device by the moving sampling plate 11 to be detected.
The support plate 10 is also a flat plate, providing support and restraint for the sampling plate 11. The supporting plate 10 is also provided with a through hole 14 matched with the inner diameter of the sample return pipeline, and the supporting plate 10 is tightly attached to the lower part of the sampling plate 11. The support plate 10 is sized larger than the sampling plate 11 to ensure that the coal intake port 13 of the sampling plate 11 does not move out of the support plate 10 when the sampling plate 11 is moved horizontally. Therefore, the pulverized coal in the coal taking port 13 of the sampling plate 11 can be taken out to the pulverized coal on-line detection device by the sampling plate 11 or returned to the original position.
When the sampling plate is installed, the coal taking port 13 of the sampling plate 11 is positioned at an initial position concentric with the sample return pipeline. The support plate 10 is fixed with the sample return pipe, and the through hole of the support plate 10 is also concentric with the sample return pipe. At this time, although the sampling plate 11 and the supporting plate 10 are inserted between the sample return pipe and the cyclone separator, the sample return pipe and the cyclone separator are also complete and continuous due to the openings on the sampling plate 11 and the supporting plate 10. The sampling plate 11 is horizontally moved on the supporting plate 10 by an electric driving device, and the pulverized coal in the coal taking port 13 on the sampling plate 11 is driven to move to each detection position or return to the initial position.
The inlet of the gas return pipeline 4 is connected with the gas outlet at the upper end of the cyclone separator 5, the outlet of the gas return pipeline 4 is connected with the pulverized coal pipeline 1, and the gas return pipeline 4 is provided with a gas return valve 16 and a gas return pump 17.
The sampling valve, the sample return valve, the air return pump, the jet pump and the like are all connected with a control circuit by adopting known electric valves to control the opening and closing of each valve and each pump.
The working process of the utility model is as follows:
1. sample collection process:
the sampling plate 11 is located at an initial position, the sampling valve 6 and the air return valve 16 are opened, the air return pump 17 is opened, the sample return valve 15 is closed, meanwhile, the air inlet 8 of the jet pump 7 is controlled to feed air through an air source, the pressure of the air source is greater than the pressure in the coal powder pipeline 1, at the moment, the jet pump 7 pumps a solid-gas two-phase coal powder gas mixture in the coal powder pipeline 1 to the cyclone separator 5, and the solid-gas two-phase coal powder gas mixture is separated into gas (inevitable, fine coal powder particles are mixed in the gas, and the gas is related to the separation efficiency of the cyclone separator 5) and solid coal powder particles. The gas (and the coal dust particles not separated) enters the gas return line 4 from the gas outlet end of the cyclone 5 and is pumped back into the coal dust pipe 1 by the gas return pump 17. The solid coal dust particles fall into the solid particle outlet at the lower end of the cyclone separator 5 due to gravity and enter the sample return pipeline 3 through the sampling detection mechanism 9. At this time, since the sample return valve 15 is closed, pulverized coal accumulates in the piping between the sample return valve 15 and the cyclone 5.
After a certain time of accumulation, when the pipeline between the sample return valve 15 and the cyclone separator 5 is filled with coal powder, the air inlet 8 is stopped to feed air, and the sampling valve 6, the air return valve 16 and the air return pump 17 are closed. At this time, the coal taking port 13 of the sampling plate 11 is also filled with coal dust as in the sample return pipeline 3, and the sample collection process is completed.
2. And (3) sampling detection process:
the power device controls the sampling plate 11 to move, and the coal powder in the coal taking port 13 on the sampling plate 11 stops moving when moving to the detection position of the coal powder on-line detection device, so that on-line detection is carried out. After the detection is completed, the sampling plate 11 is driven to move back to the initial position. The principle of the process is that a section of coal powder is robbed from the sample return pipeline, the coal powder is detected after being moved out of the pipeline, and the coal powder returns after the detection is finished.
3. And (3) returning a sample:
and opening a sample return valve 15 and controlling the air inlet 8 to feed air. Because the sampling valve 6 is closed at this time, the jet pump 7 cannot pump the solid-gas two-phase pulverized coal-gas mixture in the pulverized coal pipeline 1, and is just equivalent to a gas pump. The gas with certain pressure entering the sampling pipeline from the gas inlet 8 can pump the pulverized coal accumulated in the sample return pipeline to pass through the sample return valve 15 and enter the pulverized coal pipeline 1. When the pulverized coal in the pipeline is blown clean, the air is stopped from entering the air inlet 8, and then the sample return valve 15 is closed. Thereby completing the whole working process of automatic sampling and sample returning.
The utility model discloses from automatic sampling in the buggy pipeline, accomplish online real-time detection automatically to in the buggy pipeline is sent back to the buggy after will detecting automatically, there is not the buggy to be detained in the system outside. The utility model discloses accomplished can take a sample and can return the appearance again, avoided the sample to reveal and arouse pollution and potential safety hazard, avoided the waste. Just the utility model discloses do not have any device to stretch into in the buggy pipeline, can not exert an influence to the solid-gas two-phase fluid of buggy pipeline, be particularly useful for the sample detection of coal consumption on-line measuring system. The utility model discloses the buggy that obtains the sample carries out on-the-spot online real-time detection, has practiced thrift time cost and human cost, can satisfy the real-time requirement of coal consumption on-line measuring system.
The utility model discloses especially adapted for the sampling test of coal consumption on-line measuring system, of course, also can be applicable to the sampling test of conventional supervision projects such as thermal power plant.
The utility model discloses do not limit the concrete implementation of sampling detection mechanism 9, as long as can realize that the sampling board horizontal migration in the backup pad can, give two examples below and carry out the illustration.
Example one:
as shown in fig. 1, 2, 3 and 6, a linear slide rail 18 is arranged on the support plate 10, the sampling plate 11 is mounted on the linear slide rail 18, the sampling plate 11 is connected with a linear power device, and the pulverized coal online detection device 12 is located above the translation track of the coal taking port 13.
The linear power device may be a linear motor, an air cylinder, or the like, and is driven by known electric power and controlled by a control circuit. The linear sliding rail 18 provides support and limit for the translation of the sampling plate 11, the sampling plate 11 is driven by the linear power device to reciprocate and linearly translate on the support plate 10, and the motion trail of the coal taking port 13 is a straight line.
In this example, the sampling plate 11 is preferably a rectangular flat plate, and the coal intake port 13 is located at one end of the rectangular flat plate.
Example two:
as shown in fig. 4 and 5, the sampling plate 11 is mounted on the support plate 10 through a rotary bearing 19, the sampling plate 11 is connected with a rotary power device, and the coal dust on-line detection device 12 is located above the rotation track of the coal taking port 13.
The rotary power device may be a rotary motor or the like, and is driven by known electric power and controlled by a control circuit. Under the drive of the rotary power device, the sampling plate 11 rotates on the supporting plate 10, and the movement track of the coal taking port 13 is circular.
In this example, the sampling plate 11 is preferably a circular flat plate, and the coal intake port 13 is located on the circular flat plate at a certain radius from the rotation center.
In this example, the number of the coal taking ports 13 may be one or more. When the number of coal intake ports is plural, the plural coal intake ports 13 are distributed on a fixed radius along the rotation center. When the cyclone separator is installed, a coal taking port is ensured to be opposite to the lower end of the cyclone separator 5.
In the example, the coal dust on-line detection device is arranged on the rotating track of the coal taking port and corresponds to other coal taking ports of the round sampling plate during sampling, so that the last group of obtained coal dust can be just detected when the coal dust is taken, and the working efficiency is improved.
The utility model discloses a sampling board horizontal migration to need remain throughout in the removal the sampling board upper and lower surface respectively with cyclone lower extreme and backup pad upper surface sealed. In order to achieve a better sealing effect, as shown in fig. 6, the solid particle outlet of the cyclone separator 5 is in sealing contact with the upper surface of the sampling plate 11 through a first soft sealing ring 20 and a first hard sealing ring 21, the first soft sealing ring 20 is located above the first hard sealing ring 21, and the first soft sealing ring 20 is in a compressed state.
The first hard seal 21 contacts the upper surface of the sampling plate 11 and the compressed first soft seal 20 is pressed against the upper surface of the sampling plate 11. Thus, sealing is ensured, and when the sliding contact surface of the first hard sealing ring is abraded, the compressed first soft sealing ring 20 can elastically recover to expand, and compensation is provided to ensure the sealing effect.
The lower surface of sampling board 11 and the upper surface of backup pad 10 pass through second soft sealing washer 22 and the sealed contact of second stereoplasm sealing washer 23, and second soft sealing washer 22 is located second stereoplasm sealing washer 23 below, and second soft sealing washer 22 becomes compression state.
The sealing principle of the second soft seal ring 22 and the second hard seal ring 23 is the same as that of the first soft seal ring 20 and the first hard seal ring 21.
The utility model discloses do not restrict the concrete structural style of aforementioned each sealing washer, preferred, the first soft sealing washer 20 of and the soft sealing washer 22 of second cross-section be circular, be O type sealing washer promptly. The sections of the first hard sealing ring 21 and the second hard sealing ring 23 are both rectangular, namely, the first hard sealing ring and the second hard sealing ring are annular sealing rings. The rectangular section enables the first hard sealing ring 21 and the second hard sealing ring 23 to be in contact with the sampling plate through a plane, and a good sealing effect is achieved.
The first soft sealing ring 20 and the first hard sealing ring 21 are located in a flange at the solid particle outlet of the cyclone separator 5 (or in a flange on a short section of pipeline below the solid particle outlet of the cyclone separator 5), and the second soft sealing ring 22 and the second hard sealing ring 23 are located in a groove on the upper surface of the through hole 14 of the support plate 10.
The inlet of the sample return pipeline 3 is hermetically connected with the lower surface of the supporting plate 10 through a sealing ring 24. Since the lower surface of the support plate 10 has no relative movement with the return line, a seal is provided on the flange at the top of the lower return line by a conventional O-ring seal 24, preferably the O-ring seal 24.
The utility model discloses be provided with safe pipeline 25 between cyclone 5 and buggy pipeline 1, be provided with relief valve 26 on the safe pipeline 25.
During normal operation, the safety valve 26 is closed and does not operate, and normal operation is not affected. Only when the pipeline is blocked, the pressure in the pipeline is too high, particularly the pressure in the system is boosted too high in the sample returning process and exceeds a preset safety limit, the safety valve 26 is opened to release the pressure, the potential safety hazard is eliminated, and the working safety of the system is ensured.
The air return valve 16 and the air return pump 17 are sequentially arranged on the air return pipeline 4 from an inlet to an outlet, the inlet of the safety pipeline 25 is connected with the cyclone separator 5, and the outlet of the safety pipeline 25 is connected with the air return pipeline 4 between the air return pump 17 and the pulverized coal pipeline 1.
The utility model discloses do not restrict back appearance pipeline, sample pipeline and return air pipe way position on the buggy pipeline, it is preferred, return appearance pipeline 3, sample pipeline 2 and return air pipe way 4 set gradually on buggy pipeline 1 along the direction of delivery from the bottom up of buggy.
The coal dust on-line detection device 12 may be in any form, and in one example, it includes an on-line X-ray monitoring device 27 and/or an on-line infrared detection device 28.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides an automatic sample return system for buggy pipeline on-line measuring which characterized in that, is including setting up sample pipeline, return appearance pipeline and the return air pipeline on the buggy pipeline, wherein:
the inlet of the sampling pipeline is connected with the pulverized coal pipeline, the outlet of the sampling pipeline is connected with the inlet of the cyclone separator, a sampling valve and a jet pump are sequentially arranged on the sampling pipeline from the inlet to the outlet, and the jet pump is provided with an air inlet;
the sampling device comprises a cyclone separator, a sampling plate, a coal powder online detection device, a coal taking port, a through hole, a sampling plate and a coal powder online detection device, wherein the lower end of a solid particle outlet of the cyclone separator is provided with a sampling detection mechanism, the sampling detection mechanism comprises a supporting plate and the sampling plate tightly attached to the upper surface of the supporting plate, the coal powder online detection device is arranged above the supporting plate, the sampling plate is provided with the coal taking port, the through hole is arranged on the supporting plate and right below the solid particle outlet of the cyclone separator, the sampling plate and the supporting plate can horizontally move relative to each other, and the coal taking port moves;
the solid particle outlet of the cyclone separator is in sealing contact with the upper surface of the sampling plate, the lower surface of the sampling plate is in sealing contact with the upper surface of the supporting plate, the inlet of the sample return pipeline is in sealing connection with the lower surface of the supporting plate, the outlet of the sample return pipeline is connected with a pulverized coal pipeline, and a sample return valve is arranged on the sample return pipeline;
the inlet of the air return pipeline is connected with the air outlet of the cyclone separator, the outlet of the air return pipeline is connected with the pulverized coal pipeline, and the air return pipeline is provided with an air return valve and an air return pump.
2. The automatic sampling and sample returning system for the on-line detection of the pulverized coal pipeline as claimed in claim 1, wherein a linear slide rail is arranged on the supporting plate, the sampling plate is mounted on the linear slide rail, the sampling plate is connected with a linear power device, and the pulverized coal on-line detection device is positioned above the translation track of the coal taking port.
3. The automatic sampling and sample returning system for the on-line detection of the coal powder pipeline as claimed in claim 1, wherein the sampling plate is mounted on the supporting plate through a rotating bearing, the sampling plate is connected with a rotating power device, and the on-line detection device of the coal powder is positioned above the rotating track of the coal taking port.
4. The automatic sampling and sample returning system for the on-line detection of the pulverized coal pipeline as claimed in claim 3, wherein the number of the coal taking ports is multiple, and the multiple coal taking ports are distributed on a fixed radius along the rotation center.
5. The automatic sampling and sample returning system for the on-line detection of the pulverized coal pipeline as claimed in any one of claims 1 to 4, wherein the solid particle outlet of the cyclone separator is in sealing contact with the upper surface of the sampling plate through a first soft sealing ring and a first hard sealing ring, the first soft sealing ring is positioned above the first hard sealing ring, and the first soft sealing ring is in a compressed state;
the lower surface of the sampling plate is in sealing contact with the upper surface of the supporting plate through a second soft sealing ring and a second hard sealing ring, the second soft sealing ring is positioned below the second hard sealing ring, and the second soft sealing ring is in a compressed state;
and the inlet of the sample return pipeline is hermetically connected with the lower surface of the supporting plate through a sealing ring.
6. The automatic sampling and sample returning system for the on-line detection of the pulverized coal pipeline as claimed in claim 5, wherein the first soft sealing ring and the second soft sealing ring are both circular in cross section, and the first hard sealing ring and the second hard sealing ring are both rectangular in cross section.
7. The automatic sampling and sample returning system for the on-line detection of the pulverized coal pipeline as claimed in claim 5, wherein a safety pipeline is arranged between the cyclone separator and the pulverized coal pipeline, and a safety valve is arranged on the safety pipeline.
8. The automatic sampling and sample returning system for the on-line detection of the pulverized coal pipeline as claimed in claim 7, wherein the air return valve and the air return pump are sequentially arranged on the air return pipeline from an inlet to an outlet, the inlet of the safety pipeline is connected with the cyclone separator, and the outlet of the safety pipeline is connected with the air return pipeline between the air return pump and the pulverized coal pipeline.
9. The automatic sampling and sample returning system for the on-line detection of the pulverized coal pipeline as claimed in claim 5, wherein the sample returning pipeline, the sampling pipeline and the gas returning pipeline are sequentially arranged on the pulverized coal pipeline from bottom to top along the conveying direction of the pulverized coal.
10. The automatic sampling and sample returning system for the on-line detection of the pulverized coal pipeline as claimed in claim 9, wherein the pulverized coal on-line detection device comprises an on-line X-ray monitoring device and/or an on-line infrared detection device.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218588A (en) * | 2021-04-01 | 2021-08-06 | 新兴铸管股份有限公司 | Alarm device for detecting leakage of pulverized coal bunker |
| CN114152485A (en) * | 2021-12-03 | 2022-03-08 | 沃森能源技术（廊坊）有限公司 | Online sampling and analyzing device for gas-solid mixture in pipeline |
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2020
- 2020-07-07 CN CN202021307283.1U patent/CN212363817U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218588A (en) * | 2021-04-01 | 2021-08-06 | 新兴铸管股份有限公司 | Alarm device for detecting leakage of pulverized coal bunker |
| CN113218588B (en) * | 2021-04-01 | 2024-03-26 | 新兴铸管股份有限公司 | Alarm device for detecting leakage of pulverized coal bin |
| CN114152485A (en) * | 2021-12-03 | 2022-03-08 | 沃森能源技术（廊坊）有限公司 | Online sampling and analyzing device for gas-solid mixture in pipeline |
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