Rapid detection device for LNG (Liquefied Natural Gas) impurities

Abstract

The utility model provides an LNG impurity rapid detection device, which relates to the LNG impurity detection field, and comprises a support, a base and a gas chromatograph, the support is fixedly connected with the gas chromatograph, the upper end of the base is provided with a rotating part, the inner part of the rotating part is provided with a spiral diversion trench, and the lower end of the rotating part is provided with a gas inlet. The gas leading-in end of the gas chromatograph is communicated with the flow guide groove through an exhaust mechanism; according to the LNG impurity rapid detection device, the hot water pipe and the gas conveying pipe are arranged and used for heating natural gas and converting the liquid state into the gas state, the gas state natural gas rises to a chromatographic column of a gas chromatograph under the action of buoyancy, impurities can fall down due to the gravity of the impurities, the filtering assembly is arranged and used for filtering the impurities, and when the rotating assembly rotates, the impurities can be separated from the gas chromatograph. Through cooperation of the protruding block and the multiple arc-shaped blocks, when the filtering assembly rotates along with the rotating component, the vibration effect is achieved, impurities at the position of the filter screen are shaken off, and therefore the filter screen is prevented from being blocked, and the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chemical industry detection, specifically is a LNG impurity rapid detection device. BACKGROUND

[0002] LNG refers to liquefied natural gas, with the increasing demand for energy, LNG as a clean, efficient energy, its application is more and more widely, however, the impurities that may exist in LNG will affect its quality and use safety, therefore, it is crucial to detect the impurity composition in LNG quickly and accurately, dust and sand particles are easily mixed in the production, storage or transportation process of LNG, when LNG impurity detection is carried out, impurities need to be filtered, because the existence of impurities may affect the accuracy of detection results, through filtration, these impurities can be removed, and the reliability of detection results is ensured, in the processing and application process of LNG, filtration is an important step, it helps to improve the purity and quality of LNG, thereby guaranteeing its safety and effectiveness in various application scenarios, in addition, filtration can remove solid particles and liquid impurities in LNG, further reduce the interference to detection equipment and detection method, and ensure the accuracy and reliability of detection results.

[0003] When the common LNG impurity detection device is used, the micro-porous filter is needed to remove the tiny particle impurities, but the pore size of this filter is very small, and the filter is easily blocked by impurities, so the filter element needs to be cleaned or replaced frequently, the filtration speed is reduced, and the LNG impurity detection speed is also affected. UTILITY MODEL CONTENTS

[0004] In view of the defects of the prior art, the utility model provides a LNG impurity rapid detection device, converts liquid natural gas into gas, makes the impurities in natural gas separate out, adopts a plurality of filter screens with different pore sizes, reduces the filtration burden, reduces the probability of impurity blockage, cooperates with the vibrating structure, shakes off the impurities, prevents the filter screen from being blocked, and improves the detection efficiency.

[0005] To achieve the above object, the utility model realizes the following technical scheme: a LNG impurity rapid detection device, including support, base and gas chromatograph, the support is fixedly connected with the gas chromatograph, the upper end of the base is installed with rotating part, the inside of rotating part is opened with spiral flow guide groove, the gas introduction end of gas chromatograph is communicated with flow guide groove through exhaust mechanism, the inside of rotating part is installed with filter assembly, the upper surface of rotating part is fixedly installed with hot water tank, the inside of hot water tank is fixedly installed with spiral conveying pipe, the upper end of conveying pipe is fixedly connected with hot water tank, and natural gas is conveyed to flow guide groove through conveying pipe.

[0006] The filtering assembly comprises a movable plate and four filter screens, the four filter screens are fixedly installed in the interior of the movable plate, the aperture of the four filter screens is gradually reduced, and each filter screen is located in the interior of the flow guide groove.

[0007] Further, the movable plate is fixedly connected with a horizontal plate at one end close to the base, the horizontal plate is fixedly connected with a protruding block in an arc shape at the middle end, two springs are installed between the horizontal plate and the rotating component, the two springs are in a static state, the inner bottom wall of the base is fixedly connected with a fixing ring, and the upper surface of the fixing ring is fixedly connected with a plurality of arc blocks arranged in a circle.

[0008] Further, the exhaust mechanism comprises a hose and a baffle for disassembly and assembly, one end of the hose is communicated with the gas introduction end of the gas chromatograph, the other end of the hose is fixedly connected with the baffle, and the baffle is installed at the outer end of the flow guide groove.

[0009] Further, the upper part of the rotating component is made of heat-conducting material, and the bottom part and the middle part are made of heat-insulating material.

[0010] Further, the bottom end of the conveying pipe is located at the center position of the flow guide groove.

[0011] Further, the inside of the hot water tank is installed with a heating wire in a spiral shape.

[0012] Further, the inner bottom wall of the base is installed with a motor, and the output end of the motor is fixedly connected with the bottom part of the rotating component.

[0013] The beneficial effects of the utility model lie in:

[0014] 1. The LNG impurity rapid detection device is used for heating natural gas, converting liquid natural gas into gaseous natural gas, and separating sand particles from the gaseous natural gas, the filter assembly is used for filtering impurities, and the filter assembly is vibrated when the rotating component rotates, so that impurities in the filter screen are shaken off, the filter screen is prevented from being blocked, and the detection efficiency is improved.

[0015] 2. The LNG impurity rapid detection device is used for heating liquid natural gas, and the rotating component is rotated, so that the rotation of the flow guide groove generates centrifugal force on the natural gas and impurities, the efficiency of natural gas conveying is accelerated, and the detection efficiency is further improved. DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the utility model;

[0017] Figure 2 is a sectional view of the front view of the rotating part of the utility model;

[0018] Figure 3 is a sectional view of the top view of the rotating part of the utility model;

[0019] Figure 4 is a schematic view of the support structure of the utility model;

[0020] Figure 5 is a schematic view of the conveying pipe structure of the utility model;

[0021] Figure 6 is a schematic view of the filter assembly, the fixing ring and the arc-shaped block of the utility model;

[0022] Figure 7 is a schematic view of the exhaust mechanism structure of the utility model.

[0023] Wherein: 1, support; 2, base; 3, gas chromatograph; 4, rotating part; 5, flow guide groove; 6, filter assembly; 601, movable plate; 602, filter screen; 7, hot water tank; 8, conveying pipe; 9, cross plate; 10, protruding block; 11, fixing ring; 12, arc-shaped block; 13, spring; 14, exhaust mechanism; 141, hose; 142, baffle; 15, heating wire; 16, motor. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Reference Figures 1-7The utility model provides a kind of LNG impurity rapid detection device, including support 1, base 2 and gas chromatograph 3 equipped with thermal conductivity detector, utilize the difference of distribution coefficient between different substances in stationary phase and mobile phase, make mixture separate in chromatographic column, then detect by detector, support 1 is fixedly connected with gas chromatograph 3, base 2 is below gas chromatograph 3, the upper end of base 2 is equipped with rotating component 4, rotating component 4 is internally provided with spiral flow guide groove 5, the upper portion of rotating component 4 is set to heat-conducting material, its bottom and middle portion are set to heat-insulating material, both achieve that the heat in hot water tank 7 effectively carries out heat transfer to gas in flow guide groove 5, and reduce the loss of heat, the gas introduction end of gas chromatograph 3 is communicated with flow guide groove 5 by exhaust mechanism 14, exhaust mechanism 14 includes hose 141 and baffle 142 for disassembly, one end of hose 141 is communicated with the gas introduction end of gas chromatograph 3, and the other end is fixedly connected with baffle 142, baffle 142 is installed at the outer end of flow guide groove 5, baffle 142 is internally provided with through hole, baffle 142 is used for disassembly, is also used for plugging the outer end of flow guide groove 5, so that gas enters the gas introduction end of gas chromatograph 3 by hose 141, the inner bottom wall of base 2 is equipped with motor 16, the output end of motor 16 is fixedly connected with the bottom of rotating component 4, and motor 16 is used to drive rotating component 4 to rotate, to make gaseous natural gas diffuse to the outer ring of flow guide groove 5, rotating component 4 is internally provided with filter assembly 6, the inside of rotating component 4 is provided with notch, filter assembly 6 is lifted along notch, and filter assembly 6 is in close contact with notch, and the contact part of the two is sealed, hot water tank 7 is fixedly installed on the upper surface of rotating component 4, the upper surface of hot water tank 7 is communicated with water injection pipe, the inside of hot water tank 7 is fixedly installed with conveying pipe 8 with middle end spiral, the upper end of conveying pipe 8 is used to inject liquid natural gas, the bottom end of conveying pipe 8 is located at the center position of flow guide groove 5, when rotating component 4 rotates, it is favorable to diffuse natural gas along flow guide groove 5 outward, and pass through four filter screens 602, realize filtration, the upper end of conveying pipe 8 is fixedly connected with hot water tank 7, and one-way valve is installed in the inside of conveying pipe 8, liquid natural gas in conveying pipe 8 is converted into gaseous natural gas by the heating of hot water in hot water tank 7, convenient to remove dust and impurities, natural gas is conveyed to flow guide groove 5 by conveying pipe 8, heating wire 15 is installed in the inside of hot water tank 7, heating wire 15 is spiral, and the contact area of spiral heating wire 15 with water in hot water tank 7 is larger, which is favorable to uniformly heat the water in hot water tank 7.

[0026] The filtering assembly 6 comprises a movable plate 601 and four filter screens 602, the four filter screens 602 are fixedly installed in the interior of the movable plate 601, the pore diameters of the four filter screens 602 are gradually reduced, each filter screen 602 is located in the interior of the flow guide groove 5, one end of the movable plate 601 close to the base 2 is fixedly connected with a horizontal plate 9, the middle end of the horizontal plate 9 is fixedly connected with a protruding block 10 in an arc shape, two springs 13 are installed between the horizontal plate 9 and the rotating part 4, the two springs 13 can be detached, the two springs 13 are in a static state, the inner bottom wall of the base 2 is fixedly connected with a fixed ring 11, the upper surface of the fixed ring 11 is fixedly connected with a plurality of arc-shaped blocks 12 arranged in a circumferential direction, the protruding block 10 performs a circumferential action along with the rotating part 4, and the plurality of arc-shaped blocks 12 are sequentially extruded, the positions of the arc-shaped blocks 12 are fixed, the protruding block 10 drives the horizontal plate 9 and the movable plate 601 to repeatedly lift and drop, so that the filtering assembly 6 repeatedly lifts and drops, and the elastic deformation force of the springs 13 is combined, so that the vibration effect is achieved, and the residual impurities at the four filter screens 602 are shaken off.

[0027] Working principle:

[0028] Firstly, the water in the hot water tank 7 is heated by the heating wire 15, since the upper part of the rotating part 4 is made of a heat-conducting material, the water in the hot water tank 7 transmits heat to the flow guide groove 5 through the upper part of the rotating part 4, so that the interior of the flow guide groove 5 maintains a suitable temperature, and the bottom part and the middle part are made of heat-insulating materials, which further reduces the heat loss, then the liquid natural gas to be detected is injected into the conveying pipe 8, when the natural gas moves along the conveying pipe 8 to the hot water tank 7, the hot water in the hot water tank 7 heats the liquid natural gas, the temperature of the liquid natural gas is generally-162℃, when the temperature is above-162℃, the temperature rise makes the molecules on the surface of the liquid more easily escape into the gas phase, because the temperature rise increases the kinetic energy of the molecules, so that the molecules can overcome the binding force on the surface of the liquid and enter the gas phase, the liquid natural gas is converted into the gaseous state, and the gravity of the dust and sand particles in the liquid natural gas makes the dust and sand particles sink, so that the dust and sand particles are separated, since the conveying pipe 8 is spiral, the liquid natural gas moves along the spiral track of the conveying pipe 8, and since the moving distance is increased, the purpose of sufficiently heating the liquid natural gas is achieved.

[0029] Then, the natural gas, the dust and the sand particles enter the flow guide groove 5, the rotating part 4 is driven to rotate by the motor 16, the flow guide groove 5 starts to rotate along with the flow guide part, the centrifugal force generated by the rotation makes the natural gas, the dust and the sand particles quickly move to the outer end along the spiral track of the flow guide groove 5, and in the moving process, the four filter screens 602 are sequentially passed through, the four filter screens 602 are used for filtering the dust and the sand particles, since the pore diameters of the four filter screens 602 are gradually reduced, the larger particles are blocked by the filter screens 602 in advance and stay at the filter screens 602, so as to reduce the filtering burden of the next layer of filter screens 602, and prevent the dust and the sand particles from being accumulated together to cause large-area blockage.

[0030] Then, the rotating component 4 drives the filtering assembly 6 to move in a circle during the rotation, and then drives the horizontal plate 9 and the convex block 10 to move in a circle, the convex block 10 moves and sequentially presses the plurality of arc blocks 12, the position of the arc block 12 is unchanged, the convex block 10 drives the horizontal plate 9 to rise, and then drives the filtering assembly 6 to rise, at this time, the two springs 13 start to store the force, when the convex block 10 moves to the position away from the arc block 12, the elastic force of the two springs 13 makes the filtering assembly 6 reset, the purpose of the reciprocating lifting of the filtering assembly 6 is achieved, with the periodic rotation of the rotating assembly, the filtering assembly 6 vibrates during the working process, the dust and sand on the surface of the filter screen 602 are shaken off, the filter screen 602 is prevented from being blocked, so that the situation that the detection efficiency is low due to the blockage of the filter screen 602 is prevented, the filtering assembly 6 can be disassembled by removing the two springs 13, the baffle 142 is removed, and the dropped impurities are thrown out by the rotation of the rotating component 4.

[0031] Finally, the gaseous natural gas enters the gas introduction end of the gas chromatograph 3 through the exhaust mechanism 14, the gas chromatograph 3 utilizes the difference of the distribution coefficient of different substances between the stationary phase and the mobile phase, makes the mixture dispersed in the chromatographic column to realize the separation, and then is detected by the detector.

[0032] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions.

[0033] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A LNG impurity rapid detection device, comprising a support (1), a base (2) and a gas chromatograph (3), the support (1) is fixedly connected with the gas chromatograph (3), characterized in that: The upper end of the base (2) is provided with a rotating part (4), a spiral flow guide groove (5) is formed in the rotating part (4), the gas introduction end of the gas chromatograph (3) is communicated with the flow guide groove (5) through an exhaust mechanism (14), a filter assembly (6) is installed in the rotating part (4), a hot water tank (7) is fixedly installed on the upper surface of the rotating part (4), a spiral conveying pipe (8) is fixedly installed in the hot water tank (7), the upper end of the conveying pipe (8) is fixedly connected with the hot water tank (7), and natural gas is conveyed into the flow guide groove (5) through the conveying pipe (8). The filter assembly (6) comprises a movable plate (601) and four filter screens (602), the four filter screens (602) are fixedly installed in the movable plate (601), the pore sizes of the four filter screens (602) are gradually reduced, and each filter screen (602) is located in the flow guide groove (5).

2. The LNG impurity rapid detection device according to claim 1, characterized in that: The end of the movable plate (601) close to the base (2) is fixedly connected with a horizontal plate (9), the middle end of the horizontal plate (9) is fixedly connected with an arc-shaped protrusion (10), two springs (13) are installed between the horizontal plate (9) and the rotating part (4), the two springs (13) are in a static state, the inner bottom wall of the base (2) is fixedly connected with a fixed ring (11), and the upper surface of the fixed ring (11) is fixedly connected with a plurality of circumferentially arranged arc-shaped blocks (12).

3. The LNG impurity rapid detection device according to claim 1, characterized in that: The exhaust mechanism (14) comprises a hose (141) and a baffle (142) for disassembly, one end of the hose (141) is communicated with the gas introduction end of the gas chromatograph (3), the other end of the hose (141) is fixedly connected with the baffle (142), and the baffle (142) is installed at the outer end of the flow guide groove (5).

4. The LNG impurity rapid detection device according to claim 1, characterized in that: The upper part of the rotating part (4) is made of a heat-conducting material, and the bottom part and the middle part are made of heat-insulating materials.

5. The LNG impurity rapid detection device according to claim 1, characterized in that: The bottom end of the conveying pipe (8) is located at the center position of the flow guide groove (5).

6. The LNG impurity rapid detection device according to claim 1, characterized in that: A heating wire (15) is installed in the hot water tank (7), and the heating wire (15) is in a spiral shape.

7. The LNG impurity rapid detection device according to claim 1, characterized in that: A motor (16) is installed on the inner bottom wall of the base (2), and the output end of the motor (16) is fixedly connected with the bottom part of the rotating part (4).

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