CN108982187A - A kind of gas shield sulphur coating unit and its coating method - Google Patents
A kind of gas shield sulphur coating unit and its coating method Download PDFInfo
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- CN108982187A CN108982187A CN201811045968.0A CN201811045968A CN108982187A CN 108982187 A CN108982187 A CN 108982187A CN 201811045968 A CN201811045968 A CN 201811045968A CN 108982187 A CN108982187 A CN 108982187A
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 238000000576 coating method Methods 0.000 title claims abstract description 47
- 239000011248 coating agent Substances 0.000 title claims abstract description 34
- 239000005864 Sulphur Substances 0.000 title abstract description 6
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 61
- 239000011593 sulfur Substances 0.000 claims abstract description 61
- 238000005485 electric heating Methods 0.000 claims abstract description 15
- 238000002360 preparation method Methods 0.000 claims abstract description 15
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 239000011521 glass Substances 0.000 claims abstract description 12
- 230000001681 protective effect Effects 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 96
- 239000002184 metal Substances 0.000 claims description 42
- 238000002844 melting Methods 0.000 claims description 15
- 230000008018 melting Effects 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000004880 explosion Methods 0.000 claims 1
- 230000003647 oxidation Effects 0.000 abstract description 7
- 238000007254 oxidation reaction Methods 0.000 abstract description 7
- 239000000843 powder Substances 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 description 24
- 230000007797 corrosion Effects 0.000 description 24
- 238000011160 research Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 210000003437 trachea Anatomy 0.000 description 3
- 108010085603 SFLLRNPND Proteins 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/32—Polishing; Etching
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
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- Biodiversity & Conservation Biology (AREA)
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Abstract
The invention discloses a kind of its coating methods of gas shield sulphur coating unit; the device includes two sets of gas shield devices; first set gas shield device includes the first high temperature resistant wide-mouth bottle, first gas trap and electric heating cover; first high temperature resistant wide-mouth bottle is sealed by the first rubber stopper; the first disengaging gas pipeline being connected with the first high temperature resistant wide-mouth bottle is provided on first rubber stopper; the connection of first gas trap is provided with the sharp mouth with glass cock on the exit of the first outlet line, the side wall of the first high temperature resistant wide-mouth bottle；Second gas protective device includes the second high temperature resistant wide-mouth bottle and second gas trap; second high temperature resistant wide-mouth bottle passes through the second rubber stopper; it is provided with the second disengaging gas pipeline being connected with the second high temperature resistant wide-mouth bottle on second rubber stopper and injection pipe, second gas trap are connected in the exit of the second outlet line；Using the coating method of the device it is possible to prevente effectively from coating the oxidation of sulphur powder in sulfur test sample preparation link.
Description
Technical Field
The invention relates to a gas protection sulfur coating device and a coating method thereof, which are suitable for preparing a laboratory coating sulfur test research sample, can effectively avoid the oxidation problem in the heating and melting process of sulfur powder, and ensure the reliability of sample preparation in the coating sulfur corrosion resistance test research.
Background
In the process of production and development of a high-sulfur-content gas reservoir, when the solubility of elemental sulfur in the gas reaches critical saturation, the temperature and the pressure are continuously reduced, and the elemental sulfur is separated out and deposited under certain conditions. During the transportation of sulfur-containing oil and gas, the liquid hydrate can partially dissolve gaseous elemental sulfur, and when the liquid hydrate is evaporated, granular sulfur deposition is generated at the bottom of the pipeline. The elemental sulfur corrosion is one of the most serious corrosion in oil and gas field development, and because the sulfur element is in the third period, the outermost layer is 6 electrons, so that the electrons are easy to get lost, the compound of the sulfur is rich and colorful. The existing forms of sulfur element are diversified, so that the corrosion mechanism of sulfur is rich and complex, and although some research has been carried out on the corrosion mechanism of sulfur, the corrosion rules and mechanism of sulfur in high-temperature and high-pressure environments are still the current research hotspots. The following three methods are currently used for sulfur corrosion research: (1) directly adding sulfur powder into the corrosive solution, forming a suspended sulfur-containing solution through a stirrer, and carrying out corrosion research on the suspended sulfur-containing solution; (2) placing the sample at the bottom of the container, burying the sample in sulfur deposited at the bottom of the container to perform corrosion resistance research; (3) and (3) coating sulfur powder on the surface of the metal test piece, and placing the metal test piece in a corrosion medium for corrosion resistance test. The methods are suitable for corrosion researches in different forms, the 1 st corrosion research on the suspended sulfur solution can realize the corrosion research on a sample by the sulfur-containing suspended solution, and the corrosion caused by sulfur deposition is not researched; although the corrosion of deposited sulfur is researched in the 2 nd method, the corrosion is combined in a mode of loosely and completely covering the surface of a sample, the corrosion is not consistent with the actual condition of most pipeline sulfur corrosion, the field corrosion failure mode is adopted, particularly, the sulfur deposits are attached to the inner wall of a pipeline in a single-sided, discontinuous point-like or irregular mode at the inclined part of a downhole pipe column, the low-lying part of the pipeline or the downstream pressure drop part of equipment, the corrosion test of the sulfur coating mode is closer to the actual condition, and the 3 rd research method is the research method which is most consistent with the field working condition. However, in the research process, it is found that the preparation method of coating the surface of the sample by melting sulfur powder by heating (melting point of elemental sulfur is 115.217 ℃) which is commonly used in the preparation process has problems because the bottom of the well or some conveying mediums do not contain oxygen, and the oxidation of the sulfur powder can be caused, thereby bringing errors to the experimental research.
Disclosure of Invention
The invention provides a gas protection sulfur coating device and a coating method thereof, which are designed for avoiding sulfur powder oxidation caused by heating and melting of sulfur powder in air in a sample preparation link of a coated sulfur test research, and can effectively avoid the oxidation of the sulfur powder in the sample preparation link of the coated sulfur test.
The invention is realized by adopting the following technical scheme:
a gas protection sulfur coating device comprises a first set of gas protection device used for carrying out melting treatment on sulfur powder under protective atmosphere, and a second gas protection device used for gas protection in the coating process; wherein,
the first set of gas protection device comprises a first high-temperature-resistant wide-mouth bottle, a first gas trap and an electric heating sleeve for heating the first high-temperature-resistant wide-mouth bottle, the first high-temperature-resistant wide-mouth bottle is sealed through a first rubber plug, the first rubber plug is provided with a first gas inlet pipeline and a first gas outlet pipeline which are communicated with the first high-temperature-resistant wide-mouth bottle, the first gas trap is communicated with an outlet of the first gas outlet pipeline, and the side wall of the first high-temperature-resistant wide-mouth bottle is provided with a sharp mouth with a glass cock;
the second gas protection device comprises a second high-temperature-resistant wide-mouth bottle and a second gas trap, the second high-temperature-resistant wide-mouth bottle is sealed through a second rubber plug, a second gas inlet pipeline, a second gas outlet pipeline and an injection pipe which are communicated with the second high-temperature-resistant wide-mouth bottle are arranged on the second rubber plug, and the second gas trap is communicated with an outlet of the second gas outlet pipeline;
during the user state, the sulphur powder setting of treating the heating is in first high temperature resistant wide-necked bottle, and the metal sample setting of treating sulphur coating is in second high temperature resistant wide-necked bottle, and is located the filling tube export under.
The invention is further improved in that the first gas protection device also comprises a thermometer communicated from the first rubber plug to the inside of the first high-temperature-resistant wide-mouth bottle.
A further development of the invention is that the first inlet line is provided with a first flow meter.
A further development of the invention provides that the second inlet line is provided with a second flow meter.
A further development of the invention consists in that the filler pipe is provided with a glass plug.
A further improvement of the invention is that the first inlet line and the first outlet line are provided with valves.
A further improvement of the invention is that the second inlet line and the second outlet line are provided with valves.
A gas-shielded sulfur coating method adopting the gas-shielded sulfur coating device comprises the following steps:
1) preparation of metal samples: preparing a metal sample with the required size according to the requirement;
2) preparation of metal samples: polishing the metal sample to the fineness of 800# abrasive paper or higher, finally cleaning, drying, measuring the size and weighing; preparing a paper sheet with the same size, drawing the shape of the sulfur to be coated on the paper sheet, cutting off and pasting the paper sheet on a test piece, recording the pasting area and the shape, and placing the metal test piece in a second high-temperature-resistant wide-mouth bottle;
3) oxygen removal of the gas protection device: respectively putting the sulfur powder with set mass and the prepared metal sample into two high-temperature-resistant wide-mouth bottles, opening an inert gas inlet valve, introducing at least 20min per liter of the container volume according to the minimum speed of 100mL/min to perform deoxidization treatment on a second high-temperature-resistant wide-mouth bottle, ensuring the smoothness of an inlet and outlet gas pipeline during deoxidization, and avoiding the occurrence of burst due to higher pressure generated by accumulated gas in the second high-temperature-resistant wide-mouth bottle;
4) melting of sulfur powder: opening an electric heating sleeve to 115 ℃ to melt the sulfur powder, wherein nitrogen is continuously introduced at a small flow, the size of the nitrogen is controlled according to bubbles in the solution of the first gas catcher, and when bubbles are emitted, the gas flows in;
5) opening a piston on a sharp mouth at one side of a first high-temperature-resistant wide-mouth bottle, discarding a few drops of molten sulfur which flows out firstly, coating the molten sulfur on the exposed part of the surface of the metal sample through an injection pipe, taking out the metal sample after cooling and fixing, and removing paper sheets to obtain the metal sample coated into a fixed shape and size.
The invention has the following beneficial technical effects:
the gas protection sulfur coating device and the coating method thereof provided by the invention have the advantages of simple structure and convenience in operation, can avoid oxidation caused by the heating process of sulfur powder in the research of a coating sulfur corrosion test, ensure the coating effect of the sulfur powder, are low in cost and are easy to popularize in other fields needing solid or solid-liquid substance heating coating.
Drawings
FIG. 1 is a schematic view of a first set of gas protection devices;
in the figure: 1-an electric heating sleeve, 2-a first high-temperature-resistant wide-mouth bottle, 3-sulfur powder, 4-a first air inlet pipeline, 5-a thermometer, 6-a first rubber plug, 7-a first flowmeter, 8-a first air outlet pipeline, 9-a first gas catcher and 10-a tip with a glass cock.
FIG. 2 is a schematic diagram of a second set of gas protecting devices;
in the figure: 11-a second high-temperature-resistant wide-mouth bottle, 12-a metal sample, 13-a second air inlet pipeline, 14-a second rubber plug, 15-a second flowmeter, 16-a second air outlet pipeline, 17-a second gas trap and 18-an injection pipe (with a glass cock).
Detailed Description
The invention is further described below with reference to the following figures and examples.
The invention is designed to avoid sulfur powder oxidation caused by heating and melting sulfur powder in air in the sample preparation link of coating sulfur test research.
The invention provides a gas protection sulfur coating device which comprises two sets of gas protection devices, namely a first set of gas protection device and a second set of gas protection device.
As shown in fig. 1, the first set of gas protection device is used for performing melting treatment of sulfur powder under a protective atmosphere, and comprises an electric heating jacket 1, a first high-temperature-resistant jar 2 (one side of which is provided with a tip 10 with a glass cock), a first gas inlet pipeline 4, a first flowmeter 7, a thermometer 5, a first rubber plug 6, a first gas outlet pipeline 8 and a first gas trap 9; the second gas protection device is used for gas protection in the coating process and comprises a second high-temperature-resistant wide-mouth bottle 11, a second gas inlet pipeline 13, a second flowmeter 15, a second rubber plug 14, a second gas outlet pipeline 16, a second gas trap 17 and an injection pipe 18 (with a glass cock).
In the first set of gas protection device, a first high-temperature resistant wide-mouth bottle 2 is arranged in an electric heating sleeve 1, the heating temperature is controlled through the electric heating sleeve 1, so that sulfur powder 3 is melted, and meanwhile, the heating temperature is determined and calibrated through a measured thermometer 5. First high temperature resistant wide-necked bottle 2 is sealed through first rubber buffer 6, it has three holes to open on first rubber buffer 6, one is used for installing thermometer 5, and two other installations that are used for first air inlet line 4 and first play trachea line 8 respectively, and first air inlet line 4 and first play trachea line 8 all adopt the hose and guarantee to have the length of sufficient operation, and first air inlet line 4 stretches into 2 bottoms of first high temperature resistant wide-necked bottle, and first play trachea line 8 is located 6 lower extremes of first rubber buffer. High purity inert gas is introduced through the first gas inlet line 4 to displace air out of the first high temperature resistant jar 2, the time of displacement being related to the flow rate and the volume of the first high temperature resistant jar 2, the flow rate being controlled by the first flow meter 7. The discharge of gas is realized through the first gas outlet line 8, thereby ensuring that no excessive pressure is accumulated in the first high temperature resistant jar 2, and ensuring safety. The end of the first gas outlet pipeline 8 is connected with a first gas catcher 9, and the flow of the discharged gas can be observed through the first gas catcher 9. One side of the first high-temperature resistant wide-mouth bottle 2 is provided with a sharp mouth 10 with a glass cock, the sharp mouth 10 with the glass cock is provided with a piston, the piston is provided with a round hole, and the outflow of molten sulfur can be controlled by adjusting the round hole of the piston, so that the molten sulfur is coated on the surface of a metal sample 12.
When in use: 1) filling required amount of sulfur powder 3 into a first high-temperature-resistant wide-mouth bottle 2, connecting a thermometer 5 and a first air inlet pipeline 4 on a first rubber stopper 6, and sealing the first high-temperature-resistant wide-mouth bottle 2; 2) placing the first high-temperature-resistant wide-mouth bottle 2 in the electric heating sleeve 1, introducing inert gas to displace air in the first high-temperature-resistant wide-mouth bottle 2, calculating and determining displacement time according to the used first high-temperature-resistant wide-mouth bottle 2 and the adopted gas flow, and observing the gas flowing condition through the first gas catcher 9 to avoid overlarge or no bubble; 3) after the displacement is finished, adjusting an air inlet valve to ensure that the first gas catcher 9 keeps slow bubbles (micro-positive pressure) to appear; 4) setting the temperature of the heating jacket to the required temperature, starting a switch, displaying the temperature setting of the temperature adjusting electric heating jacket 1 through a thermometer 5, and enabling the temperature setting to be at the melting temperature of the sulfur powder; 5) after the sulfur powder is melted, the switch of the electric heating sleeve 1 is closed; 6) the application of molten sulphur is done through a sharp mouth on the side of the first gas trap 9.
In the second set of gas protection device, the second gas inlet pipeline 13 is used for introducing inert gas, the second gas outlet pipeline 17 is used for discharging gas, the function of the second gas protection device is consistent with that of the first gas protection device, the middle part of the second rubber plug 14 is provided with the injection pipe 18, and the upper part of the injection pipe 18 is provided with a valve for injecting molten sulfur through the injection pipe so as to coat the molten sulfur on the surface of the metal sample 12 in the second high-temperature resistant wide-mouth bottle 11.
The invention provides a gas protection sulfur coating method, which comprises the following steps:
1) preparation of metal samples: the metal coupon 12 is machined as necessary to the desired dimensions, preferably 40 x 10 x 3mm rectangular, and may be perforated at one end if necessary for subsequent corrosion studies.
2) Preparation of metal samples: polishing the metal sample 12 to the fineness of 800# abrasive paper or higher, finally cleaning, drying, measuring the size and weighing; a sheet of paper of the same size is prepared, the desired sulfur-coated shape (usually circular or linear with a certain width) is drawn on the sheet, cut off, stuck on the test piece (either single or double sided), and the area and shape of the sticking are recorded, and the metal test piece 12 is placed in the second high temperature resistant jar 11.
3) Oxygen removal of the gas protection device: the sulfur powder 3 with set quality and the prepared metal sample 12 are respectively put into two high-temperature resistant jars, an inert gas inlet valve is opened, the minimum speed is 100mL/min, at least 20min is introduced per liter according to the volume of a container to carry out deoxidization treatment on the second high-temperature resistant jar 11, an air inlet and outlet pipeline is guaranteed to be smooth during deoxidization, and the situation that the accumulated gas in the second high-temperature resistant jar 11 generates higher pressure to cause burst is avoided.
4) Melting of sulfur powder: the sulfur powder 3 is melted by starting the electric heating sleeve 1 to 115 ℃, and the nitrogen is always introduced at a small flow rate, the size of the nitrogen can be controlled according to bubbles in the solution of the first gas catcher 9, and the gas inflow is indicated when bubbles are emitted.
5) And (3) opening a piston on a tip on one side of the first high-temperature-resistant wide-mouth bottle 2, discarding 2 drops of molten sulfur which flows out firstly, coating the molten sulfur on the exposed part of the surface of the metal sample 12 through an injection pipe 18, cooling and fixing, taking out the metal sample 12, and removing paper sheets to obtain the metal sample 12 coated into a fixed shape and a fixed size.
Examples
The preparation of a 316L stainless steel material coated with a sulfur corrosion test sample is taken as an example.
1) Preparation of a metal sample. Preparing a strip-shaped metal sample, and punching holes at the end of the metal sample for hanging or fixing; metal samples were sanded, polished, degreased with solvent, dehydrated with alcohol, dried, then weighed, and sized.
2) Leaving a bare part with the diameter of 5mm on the surface of the metal sample, covering the rest with paper, placing the metal sample in a second high-temperature-resistant wide-mouth bottle 11, carrying out deoxidization treatment, and then carrying out micro-positive pressure treatment for later use.
3) And (4) melting sulfur powder. 100g of sulfur powder 3 is placed in a first high-temperature-resistant wide-mouth bottle 2, a first air inlet pipeline 4, a first air outlet pipeline 8 and a thermometer 5 are connected, and the mouth of the bottle is sealed; deoxidizing the inside of the first high-temperature-resistant wide-mouth bottle 2 by using nitrogen; after deoxygenation is completed, the flow of inert gas is reduced, so that micro-positive pressure is kept in the first high-temperature-resistant wide-mouth bottle 2, and air is prevented from entering; and opening the electric heating sleeve 1, heating to the melting point of the sulfur powder of 119 ℃, melting the sulfur powder, and closing the electric heating sleeve 1 after the temperature is stable.
4) And (4) coating sulfur powder. Taking out the first high-temperature resistant wide-mouth bottle 2 with the heat insulation gloves, opening a sharp-mouth piston with a glass cock on the first high-temperature resistant wide-mouth bottle 2, discarding 2 drops of molten sulfur at the front end, closing the piston, then rapidly connecting the piston with an injection port of a second high-temperature resistant wide-mouth bottle 11, opening two pistons, and coating liquid sulfur on the surface of a metal sample 12; after cooling, metal coupon 12 was tapped to confirm that the coating was firm and complete.
Claims (8)
1. A gas protection sulfur coating device is characterized by comprising a first set of gas protection device used for carrying out melting treatment on sulfur powder under protective atmosphere, and a second gas protection device used for gas protection in the coating process; wherein,
the first set of gas protection device comprises a first high-temperature-resistant wide-mouth bottle (2), a first gas trap (9) and an electric heating sleeve (1) for heating the first high-temperature-resistant wide-mouth bottle (2), the first high-temperature-resistant wide-mouth bottle (2) is sealed through a first rubber plug (6), a first gas inlet pipeline (4) and a first gas outlet pipeline (8) communicated with the first high-temperature-resistant wide-mouth bottle (2) are arranged on the first rubber plug (6), the first gas trap (9) is communicated at an outlet of the first gas outlet pipeline (8), and a sharp nozzle (10) with a glass cock is arranged on the side wall of the first high-temperature-resistant wide-mouth bottle (2);
the second gas protection device comprises a second high-temperature-resistant wide-mouth bottle (11) and a second gas trap (17), the second high-temperature-resistant wide-mouth bottle (11) is sealed through a second rubber plug (14), a second gas inlet pipeline (13) communicated with the second high-temperature-resistant wide-mouth bottle (11), a second gas outlet pipeline (16) and an injection pipe (18) are arranged on the second rubber plug (14), and the second gas trap (17) is communicated at an outlet of the second gas outlet pipeline (16);
when the device is in use, the sulfur powder (3) to be heated is arranged in the first high-temperature-resistant wide-mouth bottle (2), and the metal sample (12) to be coated with sulfur is arranged in the second high-temperature-resistant wide-mouth bottle (11) and is positioned right below the outlet of the injection pipe (18).
2. A gas-shielded sulfur coating apparatus as claimed in claim 1 wherein the first set of gas-shielded apparatus further comprises a thermometer communicating from the first rubber stopper (6) to the inside of the first high temperature-resistant jar (2).
3. A gas-shielded sulfur coating apparatus as claimed in claim 1, characterized in that the first gas inlet line (4) is provided with a first flow meter (7).
4. A gas-shielded sulfur coating apparatus as claimed in claim 3, characterized in that the second gas inlet line (13) is provided with a second flow meter (15).
5. A gas-shielded sulfur coating device as claimed in claim 1, wherein the injection pipe (18) is provided with a glass tap.
6. A gas-shielded sulfur coating apparatus as claimed in claim 1, characterized in that the first gas inlet line (4) and the first gas outlet line (8) are provided with valves.
7. A gas-shielded sulfur coating installation according to claim 1, characterized in that valves are provided on both the second gas inlet line (13) and the second gas outlet line (16).
8. A gas-shielded sulfur coating method using a gas-shielded sulfur coating apparatus according to any one of claims 1 to 7, comprising the steps of:
1) preparation of metal samples: preparing a metal sample (12) according to the required size according to the requirement;
2) preparation of metal samples: polishing the metal sample (12) to the fineness of 800# abrasive paper or higher, finally cleaning, drying, measuring the size and weighing; preparing a paper sheet with the same size, drawing the shape of sulfur to be coated on the paper sheet, cutting off and pasting the paper sheet on a test piece, recording the pasting area and the shape, and placing a metal test piece (12) in a second high-temperature-resistant wide-mouth bottle (11);
3) oxygen removal of the gas protection device: respectively putting the sulfur powder (3) with set mass and the prepared metal sample (12) into two high-temperature-resistant jars, opening an inert gas inlet valve, introducing at least 20min per liter according to the volume of a container at the minimum speed of 100mL/min to perform deoxidization treatment on the second high-temperature-resistant jar (11), ensuring the smoothness of an air inlet and outlet pipeline during deoxidization, and avoiding the explosion of the second high-temperature-resistant jar (11) due to higher pressure generated by accumulated gas;
4) melting of sulfur powder: opening the electric heating sleeve (1) to 115 ℃ to melt the sulfur powder (3), wherein nitrogen is continuously introduced at a small flow rate during the melting, the size of the nitrogen is controlled according to bubbles in the solution of the first gas catcher (9), and when bubbles are emitted, the gas flows in;
5) and (3) opening a piston on a sharp mouth at one side of the first high-temperature-resistant wide-mouth bottle (2), discarding a few drops of molten sulfur which flows out firstly, coating the molten sulfur on the exposed part of the surface of the metal sample (12) through an injection pipe (18), taking out the metal sample (12) after cooling and fixing, and removing paper sheets to obtain the metal sample (12) coated into a fixed shape and size.
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| CN201811045968.0A CN108982187B (en) | 2018-09-07 | 2018-09-07 | Gas protection sulfur coating device and coating method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111434882A (en) * | 2019-01-11 | 2020-07-21 | 中国石油天然气股份有限公司 | Method for establishing one-way drainage gas production channel on oil pipe |
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| CN111434882B (en) * | 2019-01-11 | 2022-05-06 | 中国石油天然气股份有限公司 | Method for establishing one-way drainage gas production channel on oil pipe |
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