CN209894781U - Hydrogen sulfide inhibitor evaluation test device - Google Patents
Hydrogen sulfide inhibitor evaluation test device Download PDFInfo
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- CN209894781U CN209894781U CN201822141971.4U CN201822141971U CN209894781U CN 209894781 U CN209894781 U CN 209894781U CN 201822141971 U CN201822141971 U CN 201822141971U CN 209894781 U CN209894781 U CN 209894781U
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Abstract
The utility model discloses a hydrogen sulfide inhibitor evaluation test device. The device comprises a hydrogen sulfide gas cylinder, a nitrogen gas cylinder, a gas mixing and buffering device, a hydrogen sulfide inhibitor reaction device and a 4-level hydrogen sulfide tail gas absorption kettle. Pressure gauges with control valves are arranged on the nitrogen cylinder and the hydrogen sulfide cylinder and are connected with the gas mixing and buffering device through connecting pipes, safety valves, flow meters and one-way stop valves; the gas mixing and buffering device is connected with the hydrogen sulfide inhibitor reaction device through a connecting pipe and a one-way stop valve, and hydrogen sulfide concentration detection ports with control valves are respectively arranged on inlet and outlet connecting pipes of the hydrogen sulfide inhibitor reaction device; the hydrogen sulfide inhibitor reaction device is connected with the tail gas absorption kettle through a connecting pipe and a one-way stop valve; 4-stage tail gas absorption kettles are sequentially connected in series. The utility model discloses device safe and reliable, convenient operation, the suppression effect of evaluation hydrogen sulfide inhibitor that can be qualitative fast and quantitative is applicable to the evaluation work of pursuing field hydrogen sulfide inhibitors such as chemical industry, oil.
Description
The technical field is as follows:
the utility model relates to a chemical reaction and evaluation device, concretely relates to fields such as chemical industry, oil hydrogen sulfide inhibitor screening evaluation test device.
Background
With the continuous development of economy in China, the energy demand is in a continuously increasing situation. Crude oil extraction shows a trend of high sulfur content, for example, most of the crude oil extraction is oil gas containing medium and high sulfur content on offshore production platforms such as Bob and Bohai south of China general offshore oil companies. The most effective method for stimulation of oil field reservoirs is acid fracturing, but H is generated during flowback of acid fracturing2S acute virulent gas can also generate H in chemical cleaning of oil field gathering and transportation pipelines2S acute virulent gas causes harm to human and livestock, pollutes the environment, has explosion danger, can cause serious stress cracks to sensitive materials, and brings many safety problems to oil field production and oil gas gathering and transportation.
To solve H2S causes trouble in the safe production of oil and gas, and a hydrogen sulfide inhibitor is usually added into the oil and gas for sulfur removal. But due to H2The high-risk characteristic of S gas, still lack quick convenient operation and safe and reliable' S hydrogen sulfide inhibitor performance evaluation device at present, lead to can not carry out effectual evaluation to the desulfurization performance of medicament in the laboratory.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome prior art not enough, provide a hydrogen sulfide inhibitor evaluation test device.
The utility model relates to a thinking does: a hydrogen sulfide inhibitor evaluation test device which is safe, environment-friendly, reasonable in structure, convenient and fast is designed, hydrogen sulfide and nitrogen in a gas cylinder are used as gas sources, and tail gas of hydrogen sulfide gas passing through a hydrogen sulfide inhibitor is absorbed through a tail gas absorption kettle. The inhibition effect of the hydrogen sulfide inhibitor on hydrogen sulfide is evaluated by studying the concentration change of hydrogen sulfide gas entering and exiting the hydrogen sulfide inhibitor reaction device or the quality change of the hydrogen sulfide inhibitor reaction device. Whether hydrogen sulfide is completely absorbed is detected through the change of the color of the liquid in the penultimate tail gas absorption kettle, and then the hydrogen sulfide tail gas is completely absorbed by connecting the first-stage tail gas absorption kettle.
The utility model relates to a hydrogen sulfide inhibitor evaluation test device, which comprises a hydrogen sulfide gas cylinder 1, a nitrogen gas cylinder 2, a gas mixing and buffering device 3, a hydrogen sulfide inhibitor reaction device 4, a first-stage tail gas absorption kettle 5, a second-stage tail gas absorption kettle 6, a third-stage tail gas absorption kettle 7 and a fourth-stage tail gas absorption kettle 8 which are connected in sequence;
the hydrogen sulfide gas cylinder 1 is connected with the gas mixing and buffering device 3 through a first pressure gauge 9a with a control valve, a connecting pipe 10, a first safety valve 11a, a first flow meter 12a and a first one-way stop valve 13a, and the nitrogen gas cylinder 2 is connected with the gas mixing and buffering device 3 through a second pressure gauge 9b with a control valve, a connecting pipe 10, a second flow meter 12b and a second one-way stop valve 13 b;
the inlet and outlet ends of the hydrogen sulfide inhibitor reaction device 4 are respectively provided with a first gas detection port 14a with a control valve and a second gas detection port 14b with a control valve, the gas mixing and buffering device 3 is connected with the hydrogen sulfide inhibitor reaction device 4 through a connecting pipe and a third one-way stop valve 13c, and the connecting pipe is provided with the first gas detection port 14a with a control valve;
the system comprises a first-stage tail gas absorption kettle 5, a second-stage tail gas absorption kettle 6, a third-stage tail gas absorption kettle 7 and a fourth-stage tail gas absorption kettle 8, wherein a hydrogen sulfide inhibitor reaction device 4 is connected with the first-stage tail gas absorption kettle 5 through a connecting pipe, a second safety valve 11b and a fourth one-way stop valve 13d from the top to the bottom, the connecting pipe is provided with a pressure gauge 15 and a second gas detection port 14b with a control valve, the top of the first-stage tail gas absorption kettle 5 is connected with the second-stage tail gas absorption kettle 6 through the connecting pipe from the top to the bottom, the 4-stage tail gas absorption kettles are sequentially connected in series through the connecting pipe, an outlet of the first-stage tail gas absorption kettle 5 is provided with a pressure release; first order tail gas absorption cauldron 5, second level tail gas absorption cauldron 6, third level tail gas absorption cauldron 7, the connecting pipe that admits air in the fourth level tail gas absorption cauldron 8 passes through the device top in proper order, liquid stretches into the device bottom in the device, the exhaust connecting pipe is discharged from the device top and is continuous with next stage device bottom, hydrogen sulfide inhibitor reaction unit 4, first order tail gas absorption cauldron 5, second level tail gas absorption cauldron 6, third level tail gas absorption cauldron 7, fourth level tail gas absorption cauldron 8 bottom is equipped with first blowoff valve 17a respectively, second blowoff valve 17b, third blowoff valve 17c, fourth blowoff valve 17d, fifth blowoff valve 17 e.
The pipeline, the valve, the first stage tail gas absorption kettle 5, the second stage tail gas absorption kettle 6 and the fourth stage tail gas absorption kettle 8 of all the devices in the evaluation device are preferably made of 316L stainless steel; the hydrogen sulfide inhibitor reaction device 4 is made of hastelloy; the third stage tail gas absorption kettle 7 is a transparent tail gas absorption kettle made of organic glass.
Preferably, the absorption liquid of the first stage tail gas absorption kettle 5, the second stage tail gas absorption kettle 6 and the fourth stage tail gas absorption kettle 8 is a sodium hydroxide solution with the mass concentration of 10-50%; the absorption liquid of the third stage tail gas absorption kettle 7 is a ferrous ion solution with a mass concentration of 1-20%, and the ferrous ion solution is more preferably a ferrous chloride, ferrous sulfate or ferrous nitrate solution. In the evaluation process, the saturation degree of the absorption liquid in the first stage tail gas absorption kettle 5 and the second stage tail gas absorption kettle 6 can be quickly judged through the color change of the ferric iron solution and the ferrous iron solution in the third stage tail gas absorption kettle 7, and the replacement and supplement period of the alkali liquor is determined. When alkali liquor of the first-stage tail gas absorption kettle 5 and the second-stage tail gas absorption kettle 6 needs to be replaced, the fourth-stage tail gas absorption kettle 8 can absorb residual hydrogen sulfide, and hydrogen sulfide is prevented from escaping.
Compared with the prior art, the utility model, following beneficial effect has:
the utility model discloses evaluation test device's pipeline, valve and first order tail gas absorption cauldron 5, second grade tail gas absorption cauldron 6, fourth level tail gas absorption cauldron 8 material are 316L stainless steel, and hydrogen sulfide inhibitor reaction unit 4 is the hastelloy material, and third level tail gas absorption cauldron 7 is organic glass's transparent cauldron, is airtight device except that fourth level tail gas absorption cauldron 8 is equipped with the evacuation outside of the tubes, a whole set of evaluation device safe and reliable.
The utility model discloses but evaluation test device rapid evaluation hydrogen sulfide inhibitor, the hydrogen sulfide concentration change or hydrogen sulfide inhibitor reaction unit 4's quality variation evaluation hydrogen sulfide inhibitor is to the inhibitory effect of hydrogen sulfide around through detecting hydrogen sulfide inhibitor reaction unit 4 imports and exports.
The utility model discloses evaluation test device is equipped with gas mixture and buffer 3, can guarantee gaseous intensive mixing, can adjust the concentration of required hydrogen sulfide at any time as required to the hydrogen sulfide inhibitor of different grade type.
The utility model discloses evaluation test device is equipped with first order tail gas absorption cauldron 5, second level tail gas absorption cauldron 6, third level tail gas absorption cauldron 7, fourth level tail gas absorption cauldron 8, guarantees that hydrogen sulfide all is absorbed by completely under the alkali lye needs the change condition in normal conditions and first order tail gas absorption cauldron 5, second level tail gas absorption cauldron 6, effectively prevents during hydrogen sulfide escapes the air.
The utility model discloses evaluation test device third level tail gas absorbs cauldron 7 is organic glass's transparent cauldron, through the change of ferric solution to ferrous solution colour in the third level tail gas absorbs cauldron 7 can judge the saturation of absorption liquid in first level tail gas absorption cauldron 5, the second level tail gas absorption cauldron 6 fast, confirms the change and the replenishment cycle of alkali lye, in time changes alkali lye, ensures that remaining hydrogen sulfide is absorbed.
The utility model is provided with a safety valve, and the air tightness of the device can be detected through a second safety valve 11b at the hydrogen sulfide inhibitor reaction device 4 before the experiment; when detecting that the hydrogen sulfide leaks or needs emergency shutdown, the hydrogen sulfide cylinder can be quickly closed through a first safety valve 11a at the outlet of the hydrogen sulfide cylinder 1; the device is provided with a first one-way stop valve 13a, a second one-way stop valve 13b, a third one-way stop valve 13c and a fourth one-way stop valve 13d, so that liquid is effectively prevented from being sucked backwards; the device is provided with a pressure release valve 16, so that operation under pressure can be avoided in the experimental process, and the hydrogen sulfide inhibitor reaction device 4 can be disassembled after pressure release; the bottom of the liquid device is provided with the emptying valve, so that liquid can be safely and quickly replaced according to needs, and the liquid device is convenient to operate, safe and reliable.
The utility model discloses evaluation test device does not need any electrical apparatus, and each device is independent unit, has to connect and dismantles the convenience, convenient to use, and the energy consumption is low grade characteristics, can quantitatively evaluate the effect of getting rid of hydrogen sulfide inhibitor to hydrogen sulfide through the change of hydrogen sulfide inhibitor reaction unit 4 front and back quality. The method is suitable for screening and evaluating the hydrogen sulfide inhibitor in the fields of chemical engineering, petroleum and the like.
Drawings
Fig. 1 is a schematic structural diagram of a hydrogen sulfide inhibitor evaluation test device according to an embodiment of the present invention.
In the figure, 1-a hydrogen sulfide gas cylinder, 2-a nitrogen gas cylinder, 3-a gas mixing and buffering device, 4-a hydrogen sulfide inhibitor reaction device, 5-a first-stage tail gas absorption kettle, 6-a second-stage tail gas absorption kettle, 7-a third-stage tail gas absorption kettle, 8-a fourth-stage tail gas absorption kettle, 9 a-a first pressure gauge with a control valve, 9 b-a second pressure gauge with a control valve, 10-a connecting pipe, 11 a-a first safety valve, 11 b-a second safety valve, 12 a-a first flowmeter, 12 b-a second flowmeter, 13 a-a first one-way stop valve, 13 b-a second one-way stop valve, 13 c-a third one-way stop valve, 13 d-a fourth one-way stop valve, 14 a-a first gas detection port with a control valve, 14 b-a second gas detection port with a control valve, 15-a pressure gauge, 16-a pressure relief valve, 17 a-a first emptying valve, 17 b-a second emptying valve, 17 c-a third emptying valve, 17 d-a fourth emptying valve, 17 e-a fifth emptying valve and 18-an exhaust pipe.
Detailed Description
The structure of the hydrogen sulfide inhibitor evaluation test device of the present invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic structural diagram of a hydrogen sulfide inhibitor evaluation test device, as can be seen from FIG. 1, the device comprises a hydrogen sulfide gas cylinder 1, a nitrogen gas cylinder 2, a gas mixing and buffering device 3, a hydrogen sulfide inhibitor reaction device 4, a 4-stage tail gas absorption kettle (comprising a first-stage tail gas absorption kettle 5, a second-stage tail gas absorption kettle 6, a third-stage tail gas absorption kettle 7 and a fourth-stage tail gas absorption kettle 8), and a first pressure gauge 9a with a control valve, a second pressure gauge 9b with a control valve, a first safety valve 11a, a second safety valve 11b, a first flow meter 12a, a second flow meter 12b, a first one-way stop valve 13a, a second one-way stop valve 13b, a third one-way stop valve 13c, a fourth one-way stop valve 13d, a first gas detection port 14a with a control valve, a second gas detection port 14b with a control valve, a pressure gauge 15, a relief valve 16, a first exhaust valve 17a, a second exhaust valve 17b, a third exhaust valve 17c, a fourth exhaust valve 17d, a fifth exhaust valve 17e, and an exhaust pipe 18.
The lower parts of the hydrogen sulfide gas cylinder 1 and the gas mixing and buffering device 3 are connected through a first pressure gauge 9a with a control valve, a connecting pipe 10, a first safety valve 11a, a first flow meter 12a and a first one-way stop valve 13a, the lower parts of the nitrogen gas cylinder 2 and the gas mixing and buffering device 3 are connected through a second pressure gauge 9b with a control valve, a connecting pipe 10, a second flow meter 12b and a second one-way stop valve 13b, and the flow rate of gas entering the gas mixing and buffering device 3 and the concentration of hydrogen sulfide gas are controlled; the top of the gas mixing and buffering device 3 is connected with the bottom of the hydrogen sulfide inhibitor reaction device 4 through the top of the hydrogen sulfide inhibitor reaction device 4 through a connecting pipe 10 and a third one-way stop valve 13c, and a first gas detection port 14a with a control valve is arranged on the connecting pipe; the top of the hydrogen sulfide inhibitor reaction device 4 is connected with the bottom of the first-stage tail gas absorption kettle 5 through the top of the first-stage tail gas absorption kettle 5 through a connecting pipe, and a second safety valve 11b, a pressure gauge 15, a fourth one-way stop valve 13d and a second gas detection port 14b with a control valve are arranged on the connecting pipe; the top of first order tail gas absorption cauldron 5 passes through the top of second order tail gas absorption cauldron 6 through connecting pipe 10 and links to each other with the bottom of second order tail gas absorption cauldron 6, every level of tail gas absorption cauldron loops through the connecting pipe series connection, first order tail gas absorption cauldron's top is equipped with relief valve 16, last one-level absorbing device top is equipped with blast pipe 18, hydrogen sulfide inhibitor reaction unit 4, first order tail gas absorption cauldron 5, second order tail gas absorption cauldron 6, third level tail gas absorption cauldron 7, fourth level tail gas absorption cauldron 8 bottom is equipped with first blowoff valve 17a respectively, second blowoff valve 17b, third blowoff valve 17c, fourth blowoff valve 17d, fifth blowoff valve 17 e.
The utility model discloses its operation method of hydrogen sulfide inhibitor performance evaluation of hydrogen sulfide inhibitor evaluation test device test is as follows:
(1) preparing 30 percent NaOH solution, adding the NaOH solution into a first-stage absorption kettle 5 (about 2.5L), a second-stage absorption kettle 6 (about 2L) and a fourth-stage absorption kettle 8 (about 2L) to be used as a first-stage tail gas absorption kettle, a second-stage tail gas absorption kettle and a fourth-stage tail gas absorption kettle in sequence; preparing 10% ferrous chloride solution, adding the ferrous chloride solution into a third-stage absorption kettle 7 to serve as a third-stage tail gas absorption kettle and a hydrogen sulfide residual detector;
(2) adding a certain mass of hydrogen sulfide inhibitor into a hydrogen sulfide inhibitor reaction device 4 filled with a certain amount of filler (ensuring that liquid is fully contacted with gas), and weighing G;
(3) according to the figure 1, the device is connected, a second pressure gauge 9b with a control valve and connected with the nitrogen cylinder is opened, all other valves are in a closed state, a first flow meter 12a on a connecting pipe of the nitrogen cylinder is adjusted by adjusting the second pressure gauge 9b with the control valve for about 1min, and the indication number of the pressure gauge 15 is observed to be stabilized at 3MPa, which indicates that the tightness is good; opening a second safety valve 11b, wherein bubbles emerge from the third-stage tail gas absorption kettle 7, and the sleeving device is normally connected;
(4) opening a first pressure gauge 9a with a control valve connected with a hydrogen sulfide cylinder, adjusting the flow and concentration of hydrogen sulfide gas by adjusting the first pressure gauge 9a with the control valve and observing the readings of a first flow meter 12a, opening a first gas detection port 14a with the control valve to detect the concentration of hydrogen sulfide at the inlet of a hydrogen sulfide inhibitor reaction device, closing the first gas detection port 14a with the control valve, opening a pressure release valve 16 and a second gas detection port 14b with the control valve in sequence, rapidly detecting the concentration of hydrogen sulfide at the outlet of the hydrogen sulfide inhibitor reaction device, closing the second gas detection port 14b with the control valve and the pressure release valve 16 in sequence after detection, detecting the concentration of the outlet every 5min, closing the first pressure gauge 9a with the control valve of the hydrogen sulfide cylinder when the concentration of the outlet is not reduced any more or when the iron trichloride solution in a third stage tail gas absorption kettle 7 is changed from brownish red to yellowish green, and (3) continuously introducing nitrogen for purging, closing a second pressure gauge 9b with a control valve of the nitrogen cylinder after several minutes, discharging and collecting waste liquid in the tail gas absorption kettle through a second emptying valve 17b, a third emptying valve 17c, a fourth emptying valve 17d and a fifth emptying valve 17e after the reading number of the pressure gauge 15 is 0, cleaning the device, detaching the hydrogen sulfide inhibitor reaction device 4, and weighing G1.
(5) Evaluation of Hydrogen sulfide inhibitor Performance
The inhibitor can be qualitatively evaluated by adding the mass and the reaction time of the inhibitor of the hydrogen sulfide inhibitor reaction device 4, the change of the concentration of the hydrogen sulfide at the inlet and the outlet of the hydrogen sulfide inhibitor reaction device 4, and the like; the saturation ratio is calculated from the amount of the inhibitor added and the change in mass of the hydrogen sulfide inhibitor reaction apparatus 4 before and after the reaction, and the inhibitor can be quantitatively evaluated.
The calculation formula of the desulfurization rate is as follows:
in the formula: g0Mass g of the reactor 4 for introducing hydrogen sulfide pre-inhibitor, filler and hydrogen sulfide inhibitor;
g is the mass G of the reaction device 4 for introducing the hydrogen sulfide later, adding the inhibitor, the filler and the hydrogen sulfide inhibitor;
G1mass of filler plus hydrogen sulfide inhibitor reaction unit 4, g.
The utility model relates to a hydrogen sulfide inhibitor evaluation test device safe and reliable, convenient operation, economical and practical can make the evaluation to the inhibitor fast.
Claims (4)
1. A hydrogen sulfide inhibitor evaluation test device comprises a hydrogen sulfide gas cylinder (1), a hydrogen sulfide inhibitor reaction device (4) and a tail gas absorption kettle, and is characterized by also comprising a nitrogen cylinder (2) and a gas mixing and buffering device (3) respectively connected with the hydrogen sulfide gas cylinder (1) and the nitrogen cylinder (2), wherein the tail gas absorption kettle is a 4-stage tail gas absorption kettle and comprises a first-stage tail gas absorption kettle (5), a second-stage tail gas absorption kettle (6), a third-stage tail gas absorption kettle (7) and a fourth-stage tail gas absorption kettle (8);
the hydrogen sulfide gas cylinder (1) is connected with the gas mixing and buffering device (3) through a first pressure gauge (9 a) with a control valve, a connecting pipe (10), a first safety valve (11 a), a first flow meter (12 a) and a first one-way stop valve (13 a), and the nitrogen gas cylinder (2) is connected with the gas mixing and buffering device (3) through a second pressure gauge (9 b) with a control valve, a connecting pipe (10), a second flow meter (12 b) and a second one-way stop valve (13 b);
the inlet end and the outlet end of the hydrogen sulfide inhibitor reaction device (4) are respectively provided with a first gas detection port (14 a) with a control valve and a second gas detection port (14 b) with a control valve, the gas mixing and buffering device (3) is connected with the hydrogen sulfide inhibitor reaction device (4) through a connecting pipe and a third one-way stop valve (13 c), and the connecting pipe is provided with the first gas detection port (14 a) with a control valve;
the system comprises a first-stage tail gas absorption kettle (5), a second-stage tail gas absorption kettle (6), a third-stage tail gas absorption kettle (7) and a fourth-stage tail gas absorption kettle (8), wherein a hydrogen sulfide inhibitor reaction device (4) is connected with the first-stage tail gas absorption kettle (5) through a connecting pipe, a second safety valve (11 b) and a fourth one-way stop valve (13 d) through the top to the bottom, a pressure gauge (15) and a second gas detection port (14 b) with a control valve are arranged on the connecting pipe, the top of the first-stage tail gas absorption kettle (5) is connected with the second-stage tail gas absorption kettle (6) through the connecting pipe through the top to the bottom, the 4-stage tail gas absorption kettles are sequentially connected in series through the connecting pipe, a pressure release valve (16) is arranged at the outlet of the first-stage tail; the device is characterized in that an air inlet connecting pipe in the first-stage tail gas absorption kettle (5), the second-stage tail gas absorption kettle (6), the third-stage tail gas absorption kettle (7) and the fourth-stage tail gas absorption kettle (8) sequentially passes through the top of the device, liquid in the device stretches into the bottom of the device, the air outlet connecting pipe is discharged from the top of the device and is connected with the bottom of the next-stage device, and the hydrogen sulfide inhibitor reaction device (4), the first-stage tail gas absorption kettle (5), the second-stage tail gas absorption kettle (6), the third-stage tail gas absorption kettle (7) and the fourth-stage tail gas absorption kettle (8) are respectively provided with a first emptying valve (17 a), a second emptying valve (17 b), a third emptying valve (17 c), a fourth emptying valve (17 d) and a fifth emptying valve (.
2. The hydrogen sulfide inhibitor evaluation test device according to claim 1, characterized in that: the pipeline, the valve, the first stage tail gas absorption kettle (5), the second stage tail gas absorption kettle (6) and the fourth stage tail gas absorption kettle (8) of the whole device are all made of 316L stainless steel, and the hydrogen sulfide inhibitor reaction device (4) is made of Hastelloy; the third stage tail gas absorption kettle 7 is a transparent tail gas absorption kettle made of organic glass.
3. The hydrogen sulfide inhibitor evaluation test device according to claim 1, characterized in that: absorption liquids of a first-stage tail gas absorption kettle (5), a second-stage tail gas absorption kettle (6) and a fourth-stage tail gas absorption kettle (8) of the 4-stage tail gas absorption kettle are sodium hydroxide solution with the mass concentration of 10-50%; the absorption liquid of the third-stage tail gas absorption kettle (7) is a solution of ferrous ions with the mass concentration of 1-20%.
4. The hydrogen sulfide inhibitor evaluation test device according to claim 1, characterized in that: the ferrous ion solution is ferrous chloride, ferrous sulfate or ferrous nitrate solution.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693400A (en) * | 2020-05-21 | 2020-09-22 | 中海油田服务股份有限公司 | Evaluation device of dynamic sulphur removal efficiency of sulphur removal agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693400A (en) * | 2020-05-21 | 2020-09-22 | 中海油田服务股份有限公司 | Evaluation device of dynamic sulphur removal efficiency of sulphur removal agent |
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