CN112432055B - Natural gas conveying pipe network black powder sampling and real-time monitoring device and application method thereof - Google Patents
Natural gas conveying pipe network black powder sampling and real-time monitoring device and application method thereof Download PDFInfo
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- CN112432055B CN112432055B CN202011459887.2A CN202011459887A CN112432055B CN 112432055 B CN112432055 B CN 112432055B CN 202011459887 A CN202011459887 A CN 202011459887A CN 112432055 B CN112432055 B CN 112432055B
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- 239000000843 powder Substances 0.000 title claims abstract description 119
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 239000003345 natural gas Substances 0.000 title claims abstract description 57
- 238000005070 sampling Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012806 monitoring device Methods 0.000 title abstract description 7
- 239000006096 absorbing agent Substances 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 29
- 238000012544 monitoring process Methods 0.000 claims description 25
- 210000001503 joint Anatomy 0.000 claims description 15
- 229910052742 iron Inorganic materials 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 230000002045 lasting effect Effects 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 239000004071 soot Substances 0.000 description 22
- 230000005540 biological transmission Effects 0.000 description 8
- 101150114468 TUB1 gene Proteins 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 5
- 239000003949 liquefied natural gas Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- RAQDACVRFCEPDA-UHFFFAOYSA-L ferrous carbonate Chemical compound [Fe+2].[O-]C([O-])=O RAQDACVRFCEPDA-UHFFFAOYSA-L 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a black powder sampling and real-time monitoring device of a natural gas conveying pipe network and a use method thereof, wherein the device comprises a container barrel, a black powder absorber, an air inlet pipeline and an air outlet pipeline, wherein the top end of the container barrel is provided with an end cover, the black powder absorber is arranged in the upper part of the container barrel, the air inlet pipeline and the air outlet pipeline are respectively communicated with the lower part and the upper part of the container barrel, and an air inlet ball valve and an air outlet ball valve are respectively arranged in the air inlet pipeline and the air outlet pipeline; the bottom of the container barrel is provided with a discharge pipe, and a valve is arranged on the discharge pipe. The invention discloses a natural gas conveying pipe network black powder sampling and real-time monitoring device, which adopts a method of combining a permanent magnet rod and a permanent magnet conical spiral ring to trap black powder, has the advantages of high separation efficiency and strong filtering effect, overcomes the defects of the existing black powder treatment method, can establish the relation between the total black powder amount in the whole pipeline and the pressure value in the pipeline, and has important significance for judging the composition, cause analysis and the like of the black powder in the pipeline.
Description
Technical Field
The invention relates to the technical field of energy transportation, in particular to a device for sampling and monitoring black powder of a natural gas conveying pipe network in real time and a use method thereof.
Background
The black powder is a common pollutant in natural gas long-distance pipelines and pipe networks, and consists of iron sulfide, iron carbonate, iron oxide, sulfur, sand grains and the like. The black powder can cause a series of problems such as reduced pipeline transportation quantity, blockage of meters and valves, reduced compression efficiency of a compressor and the like, and the normal transportation of natural gas and the normal use of downstream users are seriously affected. The problem of soot pollution of the transfer piping occurs at the earliest in countries where natural gas pipelines are constructed earlier, such as the united states, canada, etc. In recent years, along with the large-scale construction and the successive operation of gas pipelines in China, black powder also gradually appears in a gas pipeline network.
The problem of black powder in the sea gas logging-in external transmission pipeline of Chinese sea oil is especially common, the problems of corrosion growth of the inner wall of the pipeline, pollution of important valves, metering and pressure regulating equipment and the like are accelerated, however, the problem of black powder of the natural gas pipeline is not paid enough attention in China. Because the dust content requirement of the compressor inlet of the long-distance pipeline network on pipeline gas is in the micron level, after the natural gas source, the liquefied natural gas (liquefiednatural gas, LNG for short) source and the gas source of an external enterprise are mixed and conveyed in a part of areas, the cyclone separator and the horizontal filter of a separate conveying station or a last station relying on accumulated dust removal often reduce the accumulated efficiency due to poor selectivity of the filtering efficiency on the particle size, and the practical effect cannot reach the design performance, so the problem is more troublesome.
The practical conditions in the industry show that the current method for treating the black powder in the natural gas pipeline mainly comprises the following steps of treating the black powder by means of a filter of a traditional natural gas station, wherein filter elements are required to be replaced regularly and the practical operation difficulty is high, and cleaning the conveying pipeline regularly, but the method is labor-consuming and time-consuming, has large workload and can cause pipeline blockage and serious blockage of a natural gas station instrument valve due to insufficient black powder quantity prediction.
In addition, the current method for treating the black powder in the natural gas pipeline mainly relies on cyclone separators and horizontal filters of a separate conveying station or a gas transmission end station to treat the mixture of the black powder, other impurities, free water and the like, the cyclone separators and the horizontal filters are easy to be blocked by the free water to greatly reduce the separation efficiency, and the filtering precision of the cyclone separators and the horizontal filters is in a micron level and is similar to the submicron level of the particle size of the iron-based black powder, so that the filtering effect of the cyclone separators and the horizontal filters on the iron-based black powder is poor, and the filters used in the natural gas station are generally fixed in a station, cannot move and are not suitable for monitoring and evaluating the distribution condition of the black powder in any section of natural gas pipeline in real time.
Disclosure of Invention
The invention aims to provide a device for sampling and monitoring black powder in real time of a natural gas conveying pipe network and a use method thereof, which are used for solving the problems of low separation efficiency, poor filtering effect, inapplicability to real-time monitoring and evaluation of black powder distribution in any section of natural gas pipeline and the like in the existing black powder treatment method.
The invention provides a sampling and real-time monitoring device for black powder of a natural gas conveying pipe network, which comprises a container barrel, a black powder absorber, an air inlet pipeline and an air outlet pipeline, wherein an end cover is arranged at the top end of the container barrel, the black powder absorber is arranged in the upper part of the container barrel, the air inlet pipeline and the air outlet pipeline are respectively communicated with the lower part and the upper part of the container barrel, an air inlet ball valve and an air outlet ball valve are respectively arranged in the air inlet pipeline and the air outlet pipeline, a discharge pipe is arranged at the bottom end of the container barrel, and a valve is arranged on the discharge pipe.
The black powder absorber comprises a top plate, a plurality of permanent magnet rods and a permanent magnet conical spiral ring, wherein the top plate is covered on the top of the container barrel, the permanent magnet rods are perpendicular to the lower surface of the top plate, the starting end of the permanent magnet conical spiral ring is fixed on the lower surface of the top plate, the permanent magnet conical spiral ring is spirally wound on the outer side downwards to form a spiral ring of a plurality of ramps, and adjacent ramps of the spiral ring are tightly arranged.
Preferably, the end cover is a quick-opening end cover, and a handle ring is arranged on the end cover.
Preferably, a pressure gauge is arranged on the air inlet pipeline, and an air inlet flowmeter and an air outlet flowmeter are respectively arranged on the air inlet pipeline and the air outlet pipeline, wherein the air inlet ball valve, the pressure gauge and the air inlet flowmeter are sequentially arranged on the air inlet pipeline from the direction of a natural gas inlet pipe to the direction of an air outlet pipe, and the air outlet flowmeter and the air outlet ball valve are sequentially arranged on the air outlet pipeline from the direction of the natural gas inlet pipe to the direction of the air outlet pipe.
Preferably, the lower part of the container barrel is provided with an air inlet pipeline butt joint, the air inlet pipeline is in sealing connection with the air inlet pipeline butt joint through a flange, the upper part of the container barrel is provided with an air outlet pipeline butt joint, and the air outlet pipeline is in sealing connection with the air outlet pipeline butt joint through a flange.
Preferably, the air inlet pipeline and the air outlet pipeline are respectively arranged at two sides of the container barrel.
Preferably, the bottom of the container barrel is provided with a plurality of supporting legs.
Preferably, a lower portion of the container tub is provided with a soot accumulation portion for loading soot particles falling from the soot absorber.
Preferably, a discharge pipe is arranged at the bottom of the container barrel, a discharge gate valve and a discharge ball valve are arranged on the discharge pipe, the discharge ball valve is arranged close to the air outlet end of the discharge pipe, and the discharge gate valve is arranged close to the air inlet end of the discharge pipe.
The invention also relates to a use method of the device for sampling and monitoring the black powder of the natural gas conveying pipe network in real time, which comprises the following steps:
The method comprises the following steps that S1, natural gas mixed with black powder enters from an air inlet pipeline positioned at the lower part of a container barrel, sequentially passes through an air inlet ball valve, a pressure gauge and an air inlet flow meter, enters into the container barrel, sequentially passes through a black powder adsorber from bottom to top, and rapidly contacts with the natural gas mixed with black powder through a plurality of permanent magnet iron rods and permanent magnet conical spiral rings in the black powder adsorber, wherein iron-based black powder and non-iron-based black powder in the black powder are adsorbed, the natural gas moves to the upper part of the container barrel and flows into an air outlet pipeline, sequentially passes through an air outlet flow meter and an air outlet ball valve, and flows out from an outlet of the air outlet pipeline;
step S2, lasting for a period of time;
S3, closing the air inlet ball valve and the air outlet ball valve to isolate black powder in the container barrel;
S4, opening a discharge pipe at the bottom of the container barrel, and collecting black powder discharged from an outlet of the discharge pipe at the same time, and continuously monitoring the pressure value change of the pressure gauge until the normal pressure state is restored;
Step S5, sampling and weighing the black powder in the black powder absorber:
And S6, establishing a relation between the total black powder quantity W in the whole pipeline and the pipeline internal pressure value P according to the real-time monitoring time of the black powder adsorber, the flow changes of the air inlet flowmeter and the air outlet flowmeter, the pressure value P of the pressure gauge and the black powder quality change in the black powder adsorber.
The beneficial effects of the invention are as follows:
The invention provides a sampling and real-time monitoring device for black powder in a natural gas conveying pipe network, wherein the black powder is adsorbed mainly by a black powder adsorber, the black powder is captured by adopting a method combining a permanent magnet iron rod and a permanent magnet conical spiral ring based on the principle that a permanent magnet adsorbs iron-based black powder and is wrapped by non-iron-based black powder, the device has the advantages of high separation efficiency and strong filtering effect, overcomes the defects of the existing black powder treatment method, and establishes a relational expression between the total black powder amount in the whole pipeline and the pressure value in the pipeline by the sampling and real-time monitoring device and calculating the real-time monitoring time and the natural gas flow passing through the black powder adsorber, and has important significance for judging the composition and the cause analysis of the black powder in the pipeline, positioning the pipe section with larger black powder amount in the pipeline, adjusting the replacement period of a station filter element, replacing the filter element precision, sampling the black powder in the pipeline in real time so as to solve trade disputes and the like.
Drawings
Fig. 1 is a schematic structural diagram of a device for monitoring and sampling black powder in real time in a natural gas transportation pipe network according to embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a soot absorber according to embodiment 1 of the present invention;
fig. 3 is a top view of the connection between the top plate and the permanent magnet rod of the black powder adsorber provided in embodiment 1 of the invention.
Detailed Description
Example 1
Embodiment 1 provides a device for sampling and monitoring black powder of a natural gas transportation pipe network in real time, and the structure of the device is described in detail below.
Referring to fig. 1, the device for sampling and real-time monitoring black powder in a natural gas conveying pipe network comprises a container barrel 1, wherein an end cover 11 is arranged at the top end of the container barrel 1, and the end cover 11 is in airtight connection with the container barrel 1.
The black powder adsorber 2 is arranged in the container barrel 1, the lower part and the upper part of the container barrel 1 are respectively communicated with the air inlet pipeline 3 and the air outlet pipeline 4, wherein the air inlet pipeline 3 is used for being communicated with a natural gas pipeline of an upstream gas transmission station, and the air outlet pipeline 4 is used for being communicated with a natural gas pipeline of a downstream gas transmission station. Preferably, the gas inlet pipeline 3 is connected with a natural gas pipeline of an upstream gas transmission station through a flange, and the gas outlet pipeline 4 is connected with a natural gas pipeline of a downstream gas transmission station through a flange.
Specifically, the soot absorber 2 includes a top plate 20, a plurality of permanent magnet bars 21, and a permanent magnet conical spiral coil 22. Referring to fig. 2, a top plate 20 is covered on the top of the container barrel 1, a plurality of permanent magnet bars 21 are vertically fixed on the lower surface of the top plate 20, the initial end of a permanent magnet conical spiral ring 22 is fixed in the middle of the lower surface of the top plate 20, the permanent magnet conical spiral ring 22 is sequentially spirally wound on the permanent magnet bars 21 on the outer side from top to bottom to form a spiral ring of a multi-ramp, and adjacent ramps of the spiral ring are closely arranged.
Specifically, referring to fig. 3, the center point "X" of the lower surface of the top plate 20 is a connection point of the conical spiral coil 22 of the permanent magnet, and the remaining positions can be used as connection points of the permanent magnet rod 21.
In order to facilitate the integral movement and the movement of the black powder absorber 2, the black powder absorber 2 is detachably arranged in the upper part of the container barrel 1.
In order to enhance the black powder adsorption capacity of the black powder adsorber 2, the outer surfaces of the permanent magnet rod 21 and the permanent magnet conical spiral ring 22 are provided with spiral grooves so as to increase the adsorption surface area.
Specifically, the end cover 11 is a quick-opening end cover, specifically, the end cover 11 is provided with a handle ring 110, the handle ring 110 is a semicircular or semi-elliptical pipe ring or an iron ring, and two ends of the handle ring 110 are vertically arranged on the upper surface of the end cover 11.
In order to conveniently control whether natural gas flows in the air inlet pipeline 3 and the air outlet pipeline 4 or not, an air inlet ball valve 31 is arranged in the air inlet pipeline 3, an air outlet ball valve 41 is arranged in the air outlet pipeline 4, and preferably, the air inlet ball valve 31 and the air outlet ball valve 41 are manual ball valves.
In order to measure the pressure change of the natural gas when it is introduced and after the soot is adsorbed, a pressure gauge 30 is provided on the gas inlet pipe 3.
In order to measure the flow rate change of the natural gas in the gas inlet pipeline 3 and the gas outlet pipeline 4, the gas inlet pipeline 3 is provided with a gas inlet flowmeter 32, and the gas outlet pipeline 4 is provided with a gas outlet flowmeter 42.
Specifically, an intake ball valve 31, a pressure gauge 30, and an intake flowmeter 32 are provided in this order on the intake pipe 3 from the natural gas intake pipe direction to the outlet pipe direction.
Further, an air inlet pipe butt joint is arranged at the lower part of the container barrel 1, the air inlet pipe 3 is connected with the air inlet pipe butt joint in a sealing manner through a flange, namely, an air inlet pipe matching flange 33 is arranged at the joint of the air inlet pipe 3 and the air inlet pipe butt joint in pairs, the air inlet pipe matching flange 33 comprises two flanges respectively arranged on the air inlet pipe 3 and the air inlet pipe butt joint, the two flanges are matching flanges, and the standards, the calibers and the pressure grades of the two flanges of the matching flanges are the same, so the matching flanges are called.
Specifically, an outlet flow meter 42 and an outlet ball valve 41 are provided on the outlet pipe 4 in this order from the inlet pipe direction to the outlet pipe direction of the natural gas.
Further, an air outlet pipe butt joint is arranged at the upper part of the container barrel 1, the air outlet pipe 4 is in flange sealing connection with the air outlet pipe butt joint, namely, an air outlet pipe butt flange 43 is arranged at the joint of the air outlet pipe 4 and the air inlet pipe butt joint, and the specific connection method of the air outlet pipe butt flange 43 is referred to as the connection method of the air inlet pipe butt flange 33.
As a preferred embodiment, the inlet pipe 3 and the outlet pipe 4 are provided at both sides of the container tub 1, respectively.
In order to facilitate the accumulation of soot deposits in the container tub 1, a lower portion of the container tub 1 is provided with a soot accumulation portion 10, and the soot accumulation portion 10 is used to load soot particles falling from the soot absorber 2.
In order to improve the stability of the container barrel 1, the bottom of the container barrel 1 is provided with a plurality of supporting legs 5, the supporting legs 5 are parallel to each other, and the top ends of the supporting legs are fixed at the bottom of the container barrel 1 and the bottom ends of the supporting legs are positioned on the same plane.
In order to facilitate the discharge of the soot deposit of the soot accumulation section 10, the bottom of the container tub 1 is provided with a discharge pipe 6, and in order to control the discharge of the soot deposit by the discharge pipe 6, the discharge pipe 6 is provided with a discharge gate valve 61 and a discharge ball valve 62, and the discharge ball valve 62 is a manual ball valve, and is disposed near the air outlet end of the discharge pipe 6, and the discharge gate valve 61 is a manual gate valve, and is disposed near the air inlet end of the discharge pipe 6.
Example 2
Embodiment 2 provides a method for using a device for sampling and monitoring black powder of a natural gas conveying pipe network in real time, which adopts the device for sampling and monitoring black powder of the natural gas conveying pipe network provided in embodiment 1, and comprises the following steps:
Step S1, natural gas mixed with black powder enters from an air inlet pipeline 3 positioned at the lower part of a container barrel 1, sequentially passes through an air inlet ball valve 31, a pressure gauge 30 and an air inlet flow meter 32, enters into the container barrel 1, sequentially passes through a black powder adsorber 2 from bottom to top, rapidly contacts a plurality of permanent magnet rods 21 and permanent magnet conical spiral rings 22 in the black powder adsorber 2 with the natural gas mixed with black powder, and the iron-based black powder and the non-iron-based black powder in the black powder are adsorbed, and the natural gas moves to the upper part of the container barrel 1 and flows into an air outlet pipeline 4, sequentially passes through an air outlet flow meter 42 and an air outlet ball valve 41, and flows out from the outlet of the air outlet pipeline 4;
step S2, lasting for a plurality of hours or days;
S3, closing the air inlet ball valve 31 and the air outlet ball valve 41, disconnecting the flange connection of the air inlet pipeline 3 and the natural gas transmission pipeline and the flange connection of the air outlet pipeline 4 and the natural gas transmission pipeline, and isolating the black powder in the container barrel 1;
Step S4, opening a discharge pipe 6 at the bottom of the container barrel 1, collecting black powder discharged from an outlet of the discharge pipe 6, and continuously monitoring the pressure value change of the pressure gauge 30 until the normal pressure state is restored;
step S5, sampling and weighing the black powder in the black powder absorber 2:
step S6, according to the real-time monitoring time of the soot absorber 2, the flow changes of the inlet flow meter 32 and the outlet flow meter 42, the pressure value P of the pressure meter 30 and the soot mass change in the soot absorber 2, a relation between the total soot amount W in the whole pipeline and the pressure value P is established.
Specifically, opening the discharge pipe 6 at the bottom of the container tub 1 comprises the steps of:
First, the discharge ball valve 62 is kept closed;
opening the discharge gate valve 61;
the discharge ball valve 62 is then slowly opened again for pressure relief and gas venting.
Specifically, step S5 includes the steps of:
After the black powder absorber 2 is subjected to pressure release and gas venting to atmospheric pressure, opening the end cover 11;
The top plate 20, the permanent magnet rod 21 and the permanent magnet conical spiral ring 22 are connected together and taken out vertically from the right upper part of the container barrel 1, the iron-based black powder and the non-iron-based black powder adsorbed on the permanent magnet rod 21 and the permanent magnet conical spiral ring 22 are peeled off, all the black powder are put together and weighed, and the total weight w is obtained.
Specifically, establishing a relation between the total black powder amount W and the pressure value P in the whole pipeline comprises the following steps:
Let the total black powder amount between adjacent gas stations be W, the total distance between the adjacent upstream gas stations to the adjacent downstream gas stations be L, the gas flow rate be Q, the pressure value on the pressure gauge 30 be P, the natural gas flow rate through the black powder absorber 2 be Q, the calculation expression of the total black powder amount W is:
WL,P=w/q*Q
By monitoring the pressure value P of the pressure gauge 30 in the air intake pipe 3, the change of the total amount W of the soot trapped by the soot adsorber 2 is obtained, and the functional relationship between the total amount W of the soot in the whole pipe and the pressure value P in the pipe can be obtained.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (7)
1. The device for sampling and real-time monitoring the black powder of the natural gas conveying pipe network is characterized by comprising a container barrel (1), a black powder absorber (2), an air inlet pipeline (3) and an air outlet pipeline (4), wherein an end cover (11) is arranged at the top end of the container barrel (1),
The black powder adsorber (2) is arranged in the upper part of the container barrel (1), the air inlet pipeline (3) and the air outlet pipeline (4) are respectively communicated with the lower part and the upper part of the container barrel (1), and the air inlet pipeline (3) and the air outlet pipeline (4) are respectively provided with an air inlet ball valve (31) and an air outlet ball valve (41);
A discharge pipe (6) is arranged at the bottom end of the container barrel (1), and a valve is arranged on the discharge pipe (6);
The black powder absorber (2) is detachably arranged in the upper part of the container barrel (1), the black powder absorber (2) comprises a top plate (20), a plurality of permanent magnet rods (21) and a permanent magnet conical spiral ring (22), the top plate (20) is covered on the top of the container barrel (1), the permanent magnet rods (21) are perpendicular to the lower surface of the top plate (20), the starting end of the permanent magnet conical spiral ring (22) is fixed on the lower surface of the top plate (20), the permanent magnet conical spiral ring (22) is spirally wound downwards on the outer side of the permanent magnet rods (21) to form a spiral ring of a plurality of ramps, and adjacent ramps of the spiral ring are tightly arranged;
The gas inlet pipeline (3) is provided with a pressure gauge (30), the gas inlet pipeline (3) and the gas outlet pipeline (4) are respectively provided with a gas inlet flowmeter (32) and a gas outlet flowmeter (42), wherein the gas inlet ball valve (31), the pressure gauge (30) and the gas inlet flowmeter (32) are sequentially arranged on the gas inlet pipeline (3) from the gas inlet pipeline direction to the gas outlet pipeline direction, and the gas outlet flowmeter (42) and the gas outlet ball valve (41) are sequentially arranged on the gas outlet pipeline (4) from the gas inlet pipeline direction to the gas outlet pipeline direction;
The bottom of the container barrel (1) is provided with a discharge pipe (6), the discharge pipe (6) is provided with a discharge gate valve (61) and a discharge ball valve (62), the discharge ball valve (62) is close to the air outlet end of the discharge pipe (6), and the discharge gate valve (61) is close to the air inlet end of the discharge pipe (6).
2. The device for sampling and monitoring the black powder of the natural gas conveying pipe network in real time according to claim 1, wherein the end cover (11) is a quick-opening end cover, and a handle ring (110) is arranged on the end cover (11).
3. The device for sampling and monitoring the black powder of the natural gas conveying pipe network in real time according to claim 1, wherein,
An air inlet pipeline butt joint is arranged at the lower part of the container barrel (1), and the air inlet pipeline (3) is connected with the air inlet pipeline butt joint in a sealing way through a flange;
the upper part of the container barrel (1) is provided with an air outlet pipeline butt joint, and the air outlet pipeline (4) is in sealing connection with the air outlet pipeline butt joint through a flange.
4. The device for sampling and monitoring the black powder of the natural gas conveying pipe network in real time according to any one of the claims 1 to 3, wherein,
The air inlet pipeline (3) and the air outlet pipeline (4) are respectively arranged at two sides of the container barrel (1).
5. The device for sampling and monitoring the black powder of the natural gas conveying pipe network in real time according to claim 1, wherein,
The bottom of the container barrel (1) is provided with a plurality of supporting legs (5).
6. The device for sampling and monitoring the black powder of the natural gas conveying pipe network in real time according to claim 1, wherein,
The lower part of the container barrel (1) is provided with a black powder accumulating part (10), and the black powder accumulating part (10) is used for loading black powder particles falling from the black powder absorber (2).
7. The method for using the device for sampling and monitoring the black powder of the natural gas conveying pipe network in real time according to claim 1, wherein the method for using the device comprises the following steps:
The method comprises the steps that S1, natural gas mixed with black powder enters from an air inlet pipeline (3) positioned at the lower part of a container barrel (1), sequentially passes through an air inlet ball valve (31), a pressure gauge (30) and an air inlet flow meter (32), enters into the container barrel (1), sequentially passes through a black powder adsorber (2) from bottom to top, a plurality of permanent magnet rods (21) and permanent magnet conical coils (22) in the black powder adsorber (2) are in quick contact with the natural gas mixed with the black powder, the iron-based black powder and the non-iron-based black powder in the black powder are adsorbed, the natural gas moves to the upper part of the container barrel (1) and flows into an air outlet pipeline (4), sequentially passes through an air outlet flow meter (42) and an air outlet ball valve (41), and flows out from an outlet of the air outlet pipeline (4);
step S2, lasting for a period of time;
s3, closing an air inlet ball valve (31) and an air outlet ball valve (41) to isolate black powder in the container barrel (1);
s4, opening a discharge pipe (6) at the bottom of the container barrel (1), collecting black powder discharged from an outlet of the discharge pipe (6), and continuously monitoring the pressure value change of the pressure gauge (30) until the normal pressure state is restored;
Step S5, sampling and weighing the black powder in the black powder absorber (2):
And S6, establishing a relation between the total black powder amount W in the whole pipeline and the pressure value P in the pipeline according to the real-time monitoring time of the black powder adsorber (2), the flow changes of the air inlet flowmeter (32) and the air outlet flowmeter (42), the pressure value P of the pressure gauge (30) and the black powder quality change in the black powder adsorber (2).
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| CN209829258U (en) * | 2019-03-19 | 2019-12-24 | 庞鑫 | Natural gas line iron rust adsorption equipment |
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| CN108408790A (en) * | 2017-12-15 | 2018-08-17 | 金川集团股份有限公司 | A kind of processing unit and processing method of carbonyl iron dust adsorbed gas |
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