CN219532675U - Detection device for determining gas in coal pile - Google Patents
Detection device for determining gas in coal pile Download PDFInfo
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- CN219532675U CN219532675U CN202320290807.8U CN202320290807U CN219532675U CN 219532675 U CN219532675 U CN 219532675U CN 202320290807 U CN202320290807 U CN 202320290807U CN 219532675 U CN219532675 U CN 219532675U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The utility model discloses a detection device for measuring gas in a coal pile, which comprises a mobile power supply, and a gas collecting pipe, a gas condensation buffer device, a vacuum pump, a gas drying device, a gas flowmeter and a gas analyzer which are sequentially connected through a gas guide pipe, wherein the vacuum pump and the gas analyzer are respectively and electrically connected with the mobile power supply; the gas collection tube comprises a hollow metal round tube, one end of the metal round tube is provided with a closed tip part, the tube wall of the metal round tube close to the tip part is provided with a plurality of ventilation holes, and the other end of the metal round tube is provided with an airtight spiral cover with a gas outlet. The utility model carries out sufficient drying treatment on the gas before detection, thereby avoiding the water vapor damaging the instrument and affecting the detection result, avoiding the phenomenon of water vapor blocking the pipe, and having simple structure and more convenient and faster field operation.
Description
Technical Field
The utility model relates to the technical field of coal pile safety monitoring, in particular to a detection device for determining gas in a coal pile.
Background
Coal is an active porous medium, and has slow oxidation phenomenon under normal temperature environment, and O is consumed 2 CO is generated simultaneously, the oxidation process is accompanied with the heat release process, the internal temperature of the coal pile is gradually increased in the stacking process, the heat release process of oxidation is accelerated after the temperature is increased, even spontaneous combustion is caused, and a certain degree of combustion is causedEven polluting the environment. The tendency of coal to continue to produce CO and to increase in concentration is generally regarded as a sign of spontaneous combustion of the coal. However, the concentration of CO in the coal pile is greatly influenced by the void fraction, the wind speed, the wind direction and the like, and the highest point of the concentration of CO generally has great correlation with the occurrence of high-temperature self-heating, so that the CO and the O in the coal pile can be conveniently and timely monitored 2 The concentration change trend and the accurate detection of the highest concentration point are beneficial to more effectively predicting spontaneous combustion of the coal pile and more comprehensively analyzing and evaluating the effect of the related control technology, and provide better data reference for port coal storage and transportation management.
The present Zhejiang energy harbor operation management limited company and Zhejiang university combined application utility model patent CN211552908U discloses a coal pile internal temperature and atmosphere measuring device which can quickly and accurately measure the internal temperature of the coal pile and simultaneously detect the internal atmosphere thereof, including O 2 CO, temperature, humidity, etc., however, this structural solution has the following drawbacks: (1) the device adopts a gas analysis electrochemical gas sensor, the types and the quantity of the sensors are determined according to the components of the detected gas, if the humidity of the gas is too high, the gas to be detected is not subjected to drying treatment, which can influence the gas sensor, so that the measured data is inaccurate; (2) the device utilizes the temperature difference (gas density difference) in the pile to enable internal gas to flow outwards naturally, the gas humidity is overlarge, the pipeline is long, water vapor can accumulate and block in the pipeline, and the pump on the gas analyzer is insufficient for sucking gas into the gas sensor, so that the accuracy of a detection result can be affected.
The utility model is provided for solving the problems that the gas humidity in the coal pile is too high to damage an instrument and influence a detection result, and too long pipeline arrangement can cause water vapor to accumulate in the pipeline and block the pipeline easily.
Disclosure of Invention
The utility model aims to provide a detection device for determining gas in a coal pile, which solves the problems that the instrument is damaged due to overlarge humidity of the gas in the coal pile and water vapor is easy to accumulate and block in a pipeline due to overlong pipeline arrangement.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the detection device for measuring the gas in the coal pile comprises a mobile power supply, and a gas collecting pipe, a gas condensation buffer device, a vacuum pump, a gas drying device, a gas flowmeter and a gas analyzer which are sequentially connected through a gas guide pipe, wherein the vacuum pump and the gas analyzer are respectively and electrically connected with the mobile power supply; the gas collection tube comprises a hollow metal round tube, one end of the metal round tube is provided with a closed tip part, the tube wall of the metal round tube close to the tip part is provided with a plurality of ventilation holes, and the other end of the metal round tube is provided with an airtight spiral cover with a gas outlet.
A pointed part is arranged on the metal round tube, so that the gas collection device is convenient to insert into the coal pile to collect gas; when the gas collection pipe is used, the gas collection pipe is inserted into the coal pile, the gas in the coal pile can be pumped out under the suction effect of the vacuum pump, a large part of water vapor in the gas can be condensed and deposited by the gas condensation buffer device, then the water vapor is further removed by the gas drying device, the influence on a test result is reduced, and finally, the gas subjected to drying treatment is connected into the gas analyzer for detection after the flow is controlled by the gas flowmeter. Because the gas is fully dried before detection, the phenomenon that the instrument is damaged and the detection result is influenced by water vapor is avoided, the phenomenon that the pipe is blocked by the water vapor is avoided, and meanwhile, the device is simple in structure and more convenient and faster in site operation.
Further, the gas condensation buffer device adopts a buffer bottle, an airtight plug cover is arranged at the opening of the buffer bottle, and the airtight plug cover is provided with an air inlet communicated with an air outlet on the airtight rotary cover and an air outlet communicated with the input end of the vacuum pump.
Further, the gas drying device comprises three drying tanks which are sequentially connected through a gas guide pipe, wherein one drying tank close to one end of the gas flowmeter is filled with anhydrous calcium chloride, and the other two drying tanks are filled with allochroic silica gel; the upper part of the drying tank is provided with an air inlet, and the lower part of the drying tank is provided with an air outlet. Most of water vapor in the gas can be removed through the allochroic silica gel in the first two drying tanks, and the gas can be conveniently replaced at any time; and then, the trace moisture in the gas is further removed through anhydrous calcium chloride in a third drying tank, so that the influence on the test result is reduced.
Further, the gas analyzer is internally provided with O 2 Sensor, CO 2 Sensor, SO 2 Sensor and H 2 S sensor.
Further, the pumping force adjusting range of the vacuum pump is 0-3L/min.
Further, the gas flowmeter adopts a float flowmeter with the measuring range of 0-1.5L/min.
Further, a filter cotton piece is arranged between the airtight spiral cover and the metal round tube. Through the cotton piece of filtration that sets up, can filter the gas of gathering, get rid of the dust, and adopt the gas tightness spiral cover directly with the fixed cotton piece of filtration of metal pipe, be convenient for change cotton piece of filtration.
Further, an anti-blocking screen corresponding to the position of the air holes is arranged on the inner wall of the metal round tube. Through the anti-blocking screen mesh, the fine powder can be prevented from entering the gas collection pipe to cause pipe blocking.
Further, the ventilation holes are distributed in four rows along the circumferential array of the metal round tube, the distribution length of each row of ventilation holes is 30cm, the hole distance is 15mm, and the aperture of each ventilation hole is 5mm.
Further, the metal round tube adopts a steel tube with the length of 250cm, the tube diameter of 30mm and the tube wall thickness of 2.5 mm.
Compared with the prior art, the utility model provides a detection device for measuring gas in a coal pile, which has the following beneficial effects:
the utility model carries out sufficient drying treatment on the gas before detection, thereby avoiding the water vapor damaging the instrument and affecting the detection result, avoiding the phenomenon of water vapor blocking the pipe, and having simple structure and more convenient and faster field operation.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic cross-sectional view of a gas collection tube;
FIG. 3 is a schematic view of the structure of a buffer bottle;
fig. 4 is a schematic structural view of the drying tank.
Reference numerals: 1. a mobile power supply; 2. a gas collection tube; 21. a metal round tube; 211. ventilation holes; 22. a tip portion; 23. an airtight screw cap; 24. filtering cotton sheets; 25. anti-blocking screen cloth; 3. a gas condensation buffer device; 31. a buffer bottle; 32. an airtight plug cover; 4. a vacuum pump; 5. a gas drying device; 51. a drying tank; 52. a plug; 6. a gas flow meter; 7. a gas analyzer.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described below by means of detailed embodiments in conjunction with the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 4, the present embodiment provides a detection device for determining gas in a coal pile, which includes a mobile power source 1, and a gas collection tube 2, a gas condensation buffer device 3, a vacuum pump 4, a gas drying device 5, a gas flowmeter 6 and a gas analyzer 7 sequentially connected through a gas guide tube, wherein the vacuum pump 4 and the gas analyzer 7 are respectively electrically connected with the mobile power source 1. The gas collection tube 2 comprises a hollow metal round tube 21, one end of the metal round tube 21 is provided with a closed pointed end 22, gas is conveniently collected by being inserted into a coal pile, the metal round tube 21 is provided with a plurality of ventilation holes 211 on the tube wall close to the pointed end 22, and the other end of the metal round tube 21 is provided with an airtight spiral cover 23 with a gas outlet. When the gas collection pipe is used, the gas collection pipe is inserted into the coal pile, the gas in the coal pile can be pumped out under the suction effect of the vacuum pump, a large part of water vapor in the gas can be condensed and deposited by the gas condensation buffer device, then the water vapor is further removed by the gas drying device, the influence on a test result is reduced, and finally, the gas subjected to drying treatment is connected into the gas analyzer for detection after the flow is controlled by the gas flowmeter. Because the gas is fully dried before detection, the phenomenon that the instrument is damaged and the detection result is influenced by water vapor is avoided, the phenomenon that the pipe is blocked by the water vapor is avoided, and meanwhile, the device is simple in structure and more convenient and faster in site operation.
In some specific embodiments, referring to fig. 1 and 3, the gas condensation buffer device 3 employs a buffer bottle 31 with a volume of 250ml, an airtight plug cover 32 is disposed at an opening of the buffer bottle 31, and the airtight plug cover 32 is provided with an air inlet for communicating with an air outlet on the airtight cap 23 and an air outlet for communicating with an input end of the vacuum pump 4.
In some specific embodiments, referring to fig. 1 and 4, the gas drying device 5 includes three drying tanks 51 with plugs 52 sequentially connected through gas ducts, one drying tank 51 near one end of the gas flowmeter 6 is filled with anhydrous calcium chloride, and the other two drying tanks 51 are filled with color-changing silica gel. More specifically, the upper portion of the drying tank 51 has an air inlet, and the lower portion of the drying tank 51 has an air outlet. Most of water vapor in the gas can be removed through the allochroic silica gel in the first two drying tanks, and the gas can be conveniently replaced at any time; and then, the trace moisture in the gas is further removed through anhydrous calcium chloride in a third drying tank, so that the influence on the test result is reduced. In other embodiments, other desiccants may be used as desired by those skilled in the art to replace the fumed silica and anhydrous calcium chloride.
In some specific embodiments, the gas analyzer 7 is a YQ3000-B flue gas analyzer from Minghua, qingdao, and is internally configured with O 2 Sensor, CO 2 Sensor, SO 2 Sensor and H 2 S sensor.
In some specific embodiments, the suction force of the vacuum pump 4 is adjusted to be in the range of 0-3L/min.
In some embodiments, the gas flow meter 6 is a float flow meter with a measuring range of 0-1.5L/min, which is matched with a gas analyzer.
In some specific embodiments, referring to fig. 2, a filter cotton sheet 24 is disposed between the airtight cap 23 and the metal tube 21. Through the cotton piece of filtration that sets up, can filter the gas of gathering, get rid of the dust, and adopt the gas tightness spiral cover directly with the fixed cotton piece of filtration of metal pipe, be convenient for change cotton piece of filtration. More specifically, the filter cotton sheet 24 has a thickness of 3mm and a diameter of 30mm.
In some specific embodiments, referring to fig. 2, the inner wall of the metal round tube 21 is welded with an anti-blocking screen 25 corresponding to the position of the air holes 211. Through the anti-blocking screen mesh, the fine powder can be prevented from entering the gas collection pipe to cause pipe blocking. More specifically, the mesh diameter of the anti-blocking screen 25 is 0.5mm.
In some specific embodiments, referring to fig. 1 and 2, the ventilation holes 211 are arranged in four rows along the circumferential array of the metal round tube 21, the distribution length of each row of ventilation holes 211 is 30cm, the hole pitch is 15mm, and the aperture of each ventilation hole 211 is 5mm.
In some specific embodiments, referring to fig. 1 and 2, the metal round tube 21 is a steel tube with a length of 250cm, a tube diameter of 30mm and a tube wall thickness of 2.5 mm. The length of the tip 22 is 15cm.
In some specific embodiments, the mobile power supply 1 is a 220V power supply.
It should be noted that the specific structural dimensions of the gas collection tube 2 in the above embodiments are only described as examples, and those skilled in the art may flexibly set and adjust the structural dimensional parameters of the gas collection tube 2 according to actual use needs.
Working principle: according to the spontaneous combustion distribution rule of the coal pile, the surface layer of the coal pile is a cooling layer with the thickness of about 0.5-1.5 m, oxidation reaction does not occur, spontaneous combustion does not occur although the heat dissipation is good, the cooling layer is a oxidation layer with the distance of about 1.5-4 m from the surface layer, all conditions of spontaneous combustion of coal are provided, the oxidation layer is a choking layer with lower oxidation degree, spontaneous combustion does not occur easily, the oxidation layer is a key area for monitoring the spontaneous combustion trend, the total length of the gas collection pipe is designed to be 250cm, a portable gas analyzer and a related gas pretreatment structure are provided, and the operation is convenient and rapid, and meanwhile, the gas change of the oxidation layer can be effectively detected.
The specific use description of the device of the utility model is as follows:
(1) The buffer bottle 31, the vacuum pump 4, three drying tanks 51 with drying agents, the gas flowmeter 6 and the gas analyzer 7 are connected by utilizing gas guide pipes in sequence, the mobile power supply 1 is connected, the vacuum pump 4 is started, and soapy water is coated at each connecting position to check the air tightness;
(2) Starting a gas analyzer 7, and zeroing after the operation is stable;
(3) The prepared gas collection tube 2 is inserted into a predicted point position in the coal pile to be detected, if the tip part 22 is propped against the coal block in actual operation, a mode of downwards and forcefully drilling in the process of rotating or pulling out the gas collection tube, and then finding a point nearby for insertion;
(4) The gas outlet on the airtight cap 23 on top of the gas collection tube 2 is connected with the prepared buffer bottle 31 by a gas duct, the real-time reading on the gas analyzer 7 is observed, when the maximum value occurs, the storage is clicked, and then the data can be queried and printed according to the date.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. The detection device for measuring the gas in the coal pile is characterized by comprising a mobile power supply, and a gas collecting pipe, a gas condensation buffer device, a vacuum pump, a gas drying device, a gas flowmeter and a gas analyzer which are sequentially connected through a gas guide pipe, wherein the vacuum pump and the gas analyzer are respectively and electrically connected with the mobile power supply; the gas collection tube comprises a hollow metal round tube, one end of the metal round tube is provided with a closed tip part, the tube wall of the metal round tube close to the tip part is provided with a plurality of ventilation holes, and the other end of the metal round tube is provided with an airtight spiral cover with a gas outlet.
2. The device for detecting gas in a coal pile according to claim 1, wherein the gas condensation buffer device adopts a buffer bottle, an airtight plug cover is arranged at an opening of the buffer bottle, and the airtight plug cover is provided with an air inlet communicated with an air outlet on the airtight plug cover and an air outlet communicated with an input end of a vacuum pump.
3. The detection device for determining gas in a coal pile according to claim 1, wherein the gas drying device comprises three drying tanks connected in sequence through a gas guide pipe, one drying tank near one end of a gas flowmeter is filled with anhydrous calcium chloride, and the other two drying tanks are filled with color-changing silica gel; the upper part of the drying tank is provided with an air inlet, and the lower part of the drying tank is provided with an air outlet.
4. The apparatus according to claim 1, wherein the gas analyzer is internally provided with O 2 Sensor, CO 2 Sensor, SO 2 Sensor and H 2 S sensor.
5. The apparatus according to claim 1, wherein the vacuum pump has a pumping force adjusting range of 0 to 3L/min.
6. The apparatus according to claim 1, wherein the gas flowmeter is a float flowmeter having a measuring range of 0 to 1.5L/min.
7. The detection device for determining gases in a coal pile according to claim 1, wherein a cotton filter is arranged between the airtight screw cap and the metal round tube.
8. The detection device for determining gas in a coal pile according to claim 1, wherein the inner wall of the metal round tube is provided with an anti-blocking screen corresponding to the position of the air holes.
9. The device for detecting gas in a coal pile according to any one of claims 1 to 8, wherein the ventilation holes are four rows distributed along the circumference of the metal round tube in an array, the distribution length of each row of ventilation holes is 30cm, the hole pitch is 15mm, and the pore diameter of each ventilation hole is 5mm.
10. The device for detecting gas in a coal pile according to any one of claims 1 to 8, wherein the metal round pipe is a steel pipe with a length of 250cm, a pipe diameter of 30mm and a pipe wall thickness of 2.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320290807.8U CN219532675U (en) | 2023-02-23 | 2023-02-23 | Detection device for determining gas in coal pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320290807.8U CN219532675U (en) | 2023-02-23 | 2023-02-23 | Detection device for determining gas in coal pile |
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| Publication Number | Publication Date |
|---|---|
| CN219532675U true CN219532675U (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320290807.8U Active CN219532675U (en) | 2023-02-23 | 2023-02-23 | Detection device for determining gas in coal pile |
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| CN (1) | CN219532675U (en) |
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- 2023-02-23 CN CN202320290807.8U patent/CN219532675U/en active Active
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