CN111693341A - Sampling device and sampling method thereof - Google Patents
Sampling device and sampling method thereof Download PDFInfo
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- CN111693341A CN111693341A CN201910194632.9A CN201910194632A CN111693341A CN 111693341 A CN111693341 A CN 111693341A CN 201910194632 A CN201910194632 A CN 201910194632A CN 111693341 A CN111693341 A CN 111693341A
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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
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N21/783—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour for analysing gases
Abstract
The invention provides a sampling device and a sampling method thereof, and belongs to the field of detection equipment. The technical scheme is as follows: including stock solution cavity and gas storage cavity, gas storage cavity both ends are all opened, gas storage cavity top is provided with the end cover, the inside baffle that is provided with of gas storage cavity, be provided with the gas pocket on the baffle, be provided with absorption mechanism on the baffle, still include the trachea, trachea one end sets up in the absorption mechanism, the other end is pegged graft in the gas pocket, be located on the gas storage cavity the below of baffle is provided with the sample connection, is located the top of baffle is provided with the gas outlet, is located the below of sample connection is provided with the sample interface, be provided with the overflow mouth on the stock solution cavity, the sample connection the overflow mouth all is provided with the valve. The invention has the beneficial effects that: the gas-liquid separation can be realized, the accuracy of data acquisition is improved, and the requirements on safety and environmental protection are met.
Description
Technical Field
The invention relates to the field of detection equipment, in particular to a sampling device and a sampling method thereof.
Background
Hydrogen sulfide is a toxic, flammable, colorless gas and readily soluble in water, alcohols, carbon disulfide, white spirit and crude oil, and therefore, it is necessary to periodically sample the location containing hydrogen sulfide in order to detect the concentration of hydrogen sulfide.
Particularly in the petroleum industry, the detection of the hydrogen sulfide is particularly important, and accurate and reliable data can be provided for various designs, constructions and the like of petroleum engineering. At present, oil field front-line production units do not have relevant collection equipment, only by directly opening the sampling gate in flows such as hydrogen sulfide-containing oil gas well, oil gas gathering pipeline and oil gas gathering and transportation station to take a sample, such collection mode has a lot of problems: the collected mixture is usually oil, gas and water; splashing can be generated at the gate, and the splashing object can pollute the detection tube; the data are collected in an open environment, and the collected data are inaccurate; part of hydrogen sulfide gas is directly discharged into the ambient air to cause environmental pollution. In addition, the concentration of hydrogen sulfide is different and harms people, and the life of detection personnel can be endangered under serious conditions, in the actual sampling detection, the hydrogen sulfide can be sampled by an air bag sometimes, and the existing sampling device can not be used for prejudging the concentration of the hydrogen sulfide.
Disclosure of Invention
The invention aims to provide a sampling device and a sampling method thereof, which can realize gas-liquid separation, improve the accuracy of data acquisition and meet the requirements of safety and environmental protection.
The invention is realized by the following technical scheme: the sampling device is characterized by comprising a liquid storage cavity with an open top end and a gas storage cavity arranged above the liquid storage cavity, wherein two ends of the gas storage cavity are open, an end cover is arranged at the top of the gas storage cavity, a partition plate is arranged in the gas storage cavity, an air hole is formed in the partition plate, an absorption mechanism is arranged on the partition plate, the gas storage cavity further comprises a gas pipe, one end of the gas pipe is arranged in the absorption mechanism, the other end of the gas pipe is inserted into the air hole, the gas storage cavity is arranged on the partition plate, a sampling port is arranged below the partition plate, the gas outlet is arranged above the partition plate, a sampling interface is arranged below the sampling port, an overflow port is arranged below the liquid storage cavity, and a valve is arranged on the sampling port.
The absorption mechanism adopts in the absorption cell, be provided with the absorption liquid in the absorption cell. The absorption liquid can be selected according to different gases, and by taking hydrogen sulfide gas as an example, an alkaline solution such as a sodium hydroxide solution can be adopted, so that the hydrogen sulfide in the gas can be discharged after being absorbed by the sodium hydroxide solution, and the harm to people and the pollution to the environment are avoided.
The test paper box comprises a gas storage cavity and is characterized in that a first test paper box is arranged on the upper portion of the inner wall of the gas storage cavity, an air vent is formed in the bottom of the first test paper box, test paper is arranged in the first test paper box, and an observation port is formed in the gas storage cavity. The gas containing hydrogen sulfide is contacted with the test paper after reaction to generate chemical reaction, the concentration of the hydrogen sulfide in the gas after reaction is judged according to the color change condition of the test paper, when the color is black, the concentration of the hydrogen sulfide is proved to be very high, the condition can strengthen the protection measures of detection personnel, and a sampling or detection device with corresponding concentration is selected.
The trachea sets up in the absorption tank and the bottom passes the absorption tank, the outside cover of trachea has the inflator, the inflator with the interval has between the trachea, the inflator top be provided with the air chamber of inflator intercommunication, the inflator bottom sets up the bottom of absorption tank, the trachea top is located in the air chamber, be provided with the venthole on the lateral wall of air cylinder bottom.
The top of the gas chamber is provided with a mesh plate, the mesh plate is provided with a second test paper box, and test paper is arranged in the second test paper box, so that the concentration of hydrogen sulfide in unreacted gas can be directly pre-judged, and the method is more accurate.
The air holes are formed outside the absorption tank, and the absorption tank is inserted into the partition plate. The inner wall of the top of the absorption tank is provided with an annular buckle, and the air pipe is connected with the absorption tank through the annular buckle.
The air storage cavity is located the below of baffle is long and thin air flue, the horn mouth is connected to long and thin air flue bottom, the horn mouth with the liquid storage cavity is connected, the sampling mouth sets up on the lateral wall of long and thin air flue. The slender air channel is convenient for filling gas and reduces the space. The gas in the slender air channel does not pass through the absorption cell, and the data of the sample collected by the collecting port is more accurate.
The end cover with the gas storage cavity passes through the clamp connection, the stock solution cavity with the gas storage cavity passes through the clamp connection, and the junction is provided with the sealing member. The clamp may be of the prior art or may be attached by other means, such as a threaded connection.
A support rod is arranged between the air storage cavity and the liquid storage cavity, the support rod is positioned on the periphery of the slender air passage to prevent the slender air passage from being broken, the sampling interface is connected with a guide pipe, and the bottom end of the guide pipe is lower than the overflow port.
The outer portion of the bottom of the air pipe is provided with an annular boss, and the air cylinder is inserted into the annular boss and can be detached and cleaned conveniently.
The bottom of the end cover is provided with a boss, and the boss is provided with a clamping groove matched with the second test paper box, so that the inflator can be fixed conveniently.
The gas storage cavity and the liquid storage cavity can be made of transparent materials so as to observe the test paper and the conditions inside the cavity.
The liquid in the absorption tank is lower than the air chamber and higher than the air outlet.
Sampling method using the sampling device, step 1): closing valves of the sampling interface, the sampling port, the air outlet and the overflow port, selecting an air bag with the same volume as that of the sampling device, and connecting the air bag with the valve of the air outlet;
step 2): connecting the sampling interface with a pipeline to be detected, opening valves of the sampling interface and the gas outlet, closing the valve of the gas outlet when the gas bag is full, removing the gas bag, observing the blackening degree of the test paper in the test paper box II and the quantity of bubbles in the absorption pool at any time, closing the valve of the sampling interface when the liquid level is level with the lower end of the bell mouth, standing for 1-2 minutes, observing the blackening degree of the test paper in the test paper box I, and estimating the concentration of the hydrogen sulfide according to the discoloration conditions of the two test paper; the test paper in the paper box II directly reacts with the gas in the pipeline to be detected, the result is more accurate, the test paper in the test paper box I reacts with the gas absorbed by the absorption liquid in the absorption tank, the two times of comparison are carried out, and the effect is better.
Step 3): making protective measures according to the estimated concentration, and selecting a sampling appliance with proper concentration;
step 4): connecting the selected sampling device with a valve of the sampling port, opening the valve of the overflow port, opening the valve of the sampling port for sampling when bubbles exist in the absorption tank, and closing the valves of the sampling port and the overflow port after sampling is finished;
step 5): and a valve on the sampling port is connected with a blowing pump, the valve of the gas outlet is opened, and residual gas in the device is absorbed by the absorption cell and then discharged. After absorption in the absorption cell, the residual gas is substantially free of hydrogen sulfide.
The invention has the beneficial effects that: the gas-liquid separation can be realized, the sampling is not contacted with the external environment, the accuracy of the collected data is improved, the safety and environmental protection requirements are met, and in addition, the concentration of the hydrogen sulfide can be pre-judged.
Drawings
Fig. 1 is a schematic overall structure diagram of a first embodiment of the present invention.
Fig. 2 is a schematic internal structure diagram according to a first embodiment of the present invention.
Fig. 3 is a schematic overall structure diagram of a second embodiment of the present invention.
Fig. 4 is a schematic internal structure diagram of a second embodiment of the present invention.
Wherein the reference numerals are: 1. a liquid storage cavity; 2. a gas storage cavity; 3. an end cap; 4. a first hoop is clamped; 5. a second hoop; 6. an absorption tank; 7. an air outlet; 8. a sampling interface; 9. a sampling port; 10. an overflow port; 11. a support bar; 201. a partition plate; 202. a first test paper box; 203. an elongated airway; 204. a bell mouth; 301. a handle; 302. a boss; 601. an air tube; 602. an air cylinder; 603. an air chamber; 604. an air outlet; 605. a second test paper box; 606. an annular boss; 607. an annular buckle; 801. a conduit.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
The first embodiment;
referring to fig. 1-2, the invention is a sampling device, which comprises a liquid storage cavity 1 with an open top end and a gas storage cavity 2 arranged above the liquid storage cavity 1, wherein two ends of the gas storage cavity 2 are open, an end cover 3 is arranged at the top of the gas storage cavity 2, a partition plate 201 is arranged inside the gas storage cavity 2, an air hole is formed in the partition plate 201, an absorption pool 6 is arranged on the partition plate 201, an air pipe 601 is further included, one end of the air pipe 601 is arranged in the absorption pool 6, the other end of the air pipe is inserted into the air hole, a sampling port 9 is arranged below the partition plate 201 on the gas storage cavity 2, an air outlet 7 is arranged above the partition plate 201, a sampling port 8 is arranged below the sampling port 9, an overflow port 10 is arranged on the liquid storage cavity 1, and. The sampling port 9, the air outlet 7, the sampling port 8 and the overflow port 10 are all provided with valves. The absorption liquid can be selected according to different gases, and by taking hydrogen sulfide gas as an example, an alkaline solution such as a sodium hydroxide solution can be adopted, so that hydrogen sulfide in the gas can be discharged after being absorbed by the sodium hydroxide solution, and the harm to people and the pollution to the environment are avoided.
A first test paper box 202 is arranged on the upper portion of the inner wall of the air storage cavity 2, an air vent is formed in the bottom of the first test paper box 202, test paper is arranged in the first test paper box 202, and an observation port is formed in the air storage cavity 2. The gas containing hydrogen sulfide is contacted with the test paper after reaction to generate chemical reaction, the concentration of the hydrogen sulfide in the gas after reaction is judged according to the color change condition of the test paper, when the color change is dark, the concentration of the hydrogen sulfide is proved to be very high, the condition can strengthen the protection measures of detection personnel, and a sampling or detection device with corresponding concentration is selected.
The air pipe 601 is arranged in the absorption tank 6, the bottom end of the air pipe 601 penetrates through the absorption tank 6, an air cylinder 602 is sleeved outside the air pipe 601, an interval is reserved between the air cylinder 602 and the air pipe 601, an air chamber 603 communicated with the air cylinder 601 is arranged at the top end of the air cylinder 601, the bottom end of the air cylinder 601 is arranged at the bottom of the absorption tank 6, the top end of the air pipe 601 is located in the air chamber 603, and an air outlet 604 is formed in the side wall of.
The top of the air chamber 603 is provided with a mesh plate, the mesh plate is provided with a second test paper box 605, and test paper is arranged in the second test paper box 605, so that the concentration of hydrogen sulfide in unreacted gas can be directly pre-judged, and the method is more accurate.
The air storage cavity 2 is provided with a slender air passage 203 below the partition 201, the bottom of the slender air passage 203 is connected with a horn mouth 204, the horn mouth 204 is connected with the air storage cavity 1, and the sampling port 9 is arranged on the side wall of the slender air passage 203. The elongated gas channel 203 facilitates filling of gas and reduces space. The gas in the elongated air passage 23 does not pass through the absorption cell 6, and the data of the sample collected through the collecting port 9 is more accurate.
The end cover 3 is connected with the gas storage cavity 2 through a first clamp 4, the liquid storage cavity 1 is connected with the gas storage cavity 2 through a second clamp 5, and a sealing piece is arranged at the joint.
A support rod 11 is arranged between the air storage cavity 2 and the liquid storage cavity 1, the support rod 11 is located on the periphery of the slender air channel 203 and prevents the slender air channel 203 from being broken, the sampling interface 8 is connected with a guide pipe 801, and the bottom end of the guide pipe 801 is lower than the overflow port 10.
The outside of the bottom of the air pipe 601 is provided with an annular boss 606, and the air cylinder 602 is inserted on the annular boss 606, so that the air cylinder can be detached and is convenient to clean.
The bottom of the end cover 3 is provided with a boss 302, and the boss 302 is provided with a clamping groove matched with the second test paper box 605, so that the air cylinder 602 can be conveniently fixed.
The gas storage cavity 2 and the liquid storage cavity 1 can be made of transparent materials so as to observe the test paper and the conditions inside the cavities.
A sampling method using the sampling apparatus, step 1): closing valves of the sampling interface, the sampling port, the air outlet and the overflow port, selecting an air bag with the same volume as that of the sampling device, and connecting the air bag with the valve of the air outlet;
step 2): connecting the sampling interface with a pipeline to be detected, opening valves of the sampling interface and the gas outlet, closing the valve of the gas outlet when the gas bag is full, removing the gas bag, observing the blackening degree of the test paper in the test paper box II and the quantity of bubbles in the absorption pool at any time, closing the valve of the sampling interface when the liquid level is level with the lower end of the bell mouth, standing for 1-2 minutes, observing the blackening degree of the test paper in the test paper box I, and estimating the concentration of the hydrogen sulfide according to the discoloration conditions of the two test paper; the test paper in the paper box II directly reacts with the gas in the pipeline to be detected, the result is more accurate, the test paper in the test paper box I reacts with the gas absorbed by the absorption liquid in the absorption tank, the two times of comparison are carried out, and the effect is better.
Step 3): making protective measures according to the estimated concentration, and selecting a sampling appliance with proper concentration;
step 4): connecting the selected sampling device with a valve of the sampling port, opening the valve of the overflow port, opening the valve of the sampling port for sampling when bubbles exist in the absorption tank, and closing the valves of the sampling port and the overflow port after sampling is finished;
step 5): and a valve on the sampling port is connected with a blowing pump, the valve of the gas outlet is opened, and residual gas in the device is absorbed by the absorption cell and then discharged. After absorption in the absorption cell, the residual gas is substantially free of hydrogen sulfide.
Example two:
referring to fig. 3-4, the invention relates to a sampling device, which comprises a liquid storage cavity 1 with an open top end and a gas storage cavity 2 arranged above the liquid storage cavity 1, wherein two ends of the gas storage cavity 2 are open, an end cover 3 is arranged at the top of the gas storage cavity 2, a partition plate 201 is arranged inside the gas storage cavity 2, an air hole is formed in the partition plate 201, an absorption pool 6 is arranged on the partition plate 201, an air pipe 601 is further included, one end of the air pipe 601 is arranged in the absorption pool 6, the other end of the air pipe 601 is inserted into the air hole, a sampling port 9 is arranged below the partition plate 201 on the gas storage cavity 2, an air outlet 7 is arranged above the partition plate 201, a sampling port 8 is arranged below the sampling port 9, an overflow port 10 is arranged on the liquid storage cavity 1. A first test paper box 202 is arranged on the upper portion of the inner wall of the air storage cavity 2, an air vent is formed in the bottom of the first test paper box 202, test paper is arranged in the first test paper box 202, and an observation port is formed in the air storage cavity 2.
The air hole is arranged outside the absorption tank 6, and the absorption tank 6 is inserted on the partition plate 201. An annular buckle 607 is arranged on the inner wall of the top of the absorption tank 6, and the air pipe 601 is connected with the absorption tank 6 through the annular buckle 607.
The end cover 3 is in threaded connection with the gas storage cavity 2, the liquid storage cavity 1 is in threaded connection with the gas storage cavity 2, and a sealing piece is arranged at the joint.
The sampling port 8 is connected with a conduit 801, and the bottom end of the conduit 801 is lower than the overflow port 10.
The gas storage cavity 2 and the liquid storage cavity 1 can be made of transparent materials so as to observe the test paper and the conditions inside the cavities.
The invention only takes hydrogen sulfide as an example, is also suitable for sampling other gases and liquid with various densities, has small volume, convenient carrying, simple operation, high practicability and low manufacturing cost, generally needs to collect 100ML-1 liters by taking hydrogen sulfide gas as an example, and the volume of the whole device is generally not more than 5 liters.
The technical features of the present invention which are not described in the above embodiments may be implemented by or using the prior art, and are not described herein again, of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and variations, modifications, additions or substitutions which may be made by those skilled in the art within the spirit and scope of the present invention should also fall within the protection scope of the present invention.
Claims (10)
1. The sampling device is characterized by comprising a liquid storage cavity with an open top end and a gas storage cavity arranged above the liquid storage cavity, wherein two ends of the gas storage cavity are open, an end cover is arranged at the top of the gas storage cavity, a partition plate is arranged in the gas storage cavity, an air hole is formed in the partition plate, an absorption mechanism is arranged on the partition plate, the gas storage cavity further comprises a gas pipe, one end of the gas pipe is arranged in the absorption mechanism, the other end of the gas pipe is inserted into the air hole, the gas storage cavity is arranged on the partition plate, a sampling port is arranged below the partition plate, the gas outlet is arranged above the partition plate, a sampling interface is arranged below the sampling port, an overflow port is arranged below the liquid storage cavity, and a valve is arranged on the sampling port.
2. The sampling device of claim 1, wherein the absorption mechanism employs an absorption cell having an absorption liquid disposed therein.
3. The sampling device according to claim 2, wherein a first test paper box is arranged on the upper portion of the inner wall of the air storage cavity, a vent hole is arranged at the bottom of the first test paper box, test paper is arranged in the first test paper box, and an observation port is arranged on the air storage cavity.
4. The sampling device according to claim 2, wherein the air tube is disposed in the absorption cell and the bottom end of the air tube passes through the absorption cell, the air tube is sleeved with an air cylinder, the air cylinder is spaced from the air tube, an air chamber communicated with the air cylinder is disposed at the top end of the air cylinder, the bottom end of the air cylinder is disposed at the bottom of the absorption cell, the top end of the air tube is located in the air chamber, an air outlet is disposed on a side wall of the bottom of the air cylinder, an annular boss is disposed at the outside of the bottom of the air tube, and the air cylinder is inserted into the annular boss.
5. The sampling device according to claim 4, wherein a mesh plate is arranged at the top of the air chamber, a second test paper box is arranged on the mesh plate, test paper is arranged in the second test paper box, a boss is arranged at the bottom of the end cover, and a clamping groove matched with the second test paper box is arranged on the boss.
6. The sampling device according to claim 2, wherein the air hole is arranged outside the absorption cell, the absorption cell is inserted on the partition plate, an annular buckle is arranged on the inner wall of the top of the absorption cell, and the air pipe is connected with the absorption cell through the annular buckle.
7. The sampling device according to claim 2, wherein the air storage cavity is located below the partition plate and is an elongated air passage, a bell mouth is connected to the bottom of the elongated air passage and is connected with the liquid storage cavity, and the sampling port is arranged on the side wall of the elongated air passage.
8. The sampling device of claim 2, wherein the end cap is connected to the air storage cavity by a clamp, the air storage cavity is connected to the liquid storage cavity by a clamp, and a sealing member is disposed at the connection.
9. The sampling device of claim 7, wherein a support rod is disposed between the air storage cavity and the liquid storage cavity, the support rod is located at the periphery of the elongated air passage, the sampling port is connected with a conduit, and the bottom end of the conduit is lower than the overflow port.
10. The sampling method of the sampling device according to any one of claims 1 to 9,
step 1): closing valves of the sampling interface, the sampling port, the air outlet and the overflow port, selecting an air bag with the same volume as that of the sampling device, and connecting the air bag with the valve of the air outlet;
step 2): connecting the sampling interface with a pipeline to be detected, opening valves of the sampling interface and the gas outlet, closing the valve of the gas outlet when the gas bag is full, removing the gas bag, observing the blackening degree of the test paper in the test paper box II and the quantity of bubbles in the absorption pool at any time, closing the valve of the sampling interface when the liquid level is level with the lower end of the bell mouth, standing for 1-2 minutes, observing the blackening degree of the test paper in the test paper box I, and estimating the concentration of the hydrogen sulfide according to the discoloration conditions of the two test paper;
step 3): making protective measures according to the estimated concentration, and selecting a sampling appliance with proper concentration;
step 4): connecting the selected sampling device with a valve of the sampling port, opening the valve of the overflow port, opening the valve of the sampling port for sampling when bubbles exist in the absorption tank, and closing the valves of the sampling port and the overflow port after sampling is finished;
step 5): and a valve on the sampling port is connected with a blowing pump, the valve of the gas outlet is opened, and residual gas in the device is absorbed by the absorption cell and then discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910194632.9A CN111693341A (en) | 2019-03-14 | 2019-03-14 | Sampling device and sampling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910194632.9A CN111693341A (en) | 2019-03-14 | 2019-03-14 | Sampling device and sampling method thereof |
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| Publication Number | Publication Date |
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| CN111693341A true CN111693341A (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910194632.9A Pending CN111693341A (en) | 2019-03-14 | 2019-03-14 | Sampling device and sampling method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686622A (en) * | 2021-10-20 | 2021-11-23 | 胜利油田东强机电设备制造有限公司 | Oil monitoring sampling device based on wireless transmission |
-
2019
- 2019-03-14 CN CN201910194632.9A patent/CN111693341A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686622A (en) * | 2021-10-20 | 2021-11-23 | 胜利油田东强机电设备制造有限公司 | Oil monitoring sampling device based on wireless transmission |
| CN113686622B (en) * | 2021-10-20 | 2022-02-15 | 胜利油田东强机电设备制造有限公司 | Oil monitoring sampling device based on wireless transmission |
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