Purification equipment for output natural gas

Abstract

The utility model relates to output natural gas purification equipment, and relates to the technical field of natural gas purification. The purification equipment for the output natural gas comprises the cyclone separator, the sprayer and the sulfur recovery device, when the output natural gas is introduced into the barrel body of the cyclone separator, the sprayer sprays water to the output natural gas, so that the mass of solid sulfur particles carried by the output natural gas is increased, and the output natural gas is purified. Gaseous natural gas is separated from solid-liquid mixed sulfur particles through a cyclone separator, so that the sulfur particles are led to a sulfur recovery device from an impurity discharge port; and liquid attached to the sulfur is pumped away through vacuumizing equipment in the sulfur recovery device, and dry sulfur solids are obtained. That is to say, the output natural gas purification equipment provided by the utility model not only can purify the output natural gas, but also can realize the effect of recovering sulfur in the output natural gas, and generates extra economic benefits when purifying the natural gas.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas purification, and particularly relates to an external transmission natural gas purification device. Background Art

[0002] In order to remove high hydrogen sulfide contained in natural gas, some production units will adopt a complex iron desulfurization process to desulfurize the collected natural gas.

[0003] Using the complex iron desulfurization process to desulfurize natural gas will produce a large amount of solid sulfur. Since the flow rate of the collected natural gas is relatively fast, fine sulfur dust will be driven to flow during the flow of natural gas. Then the sulfur dust has a certain viscosity and will adhere to the equipment. Moreover, the sulfur dust may react with iron materials, easily causing corrosion of iron pipelines. Summary of the Utility Model

[0004] The utility model provides an external transmission natural gas purification device for removing sulfur dust in the external transmission natural gas.

[0005] The utility model provides an external transmission natural gas purification device, including a cyclone separator. The cyclone separator includes a cylinder body, and the cylinder body is formed with a gas inlet, a gas outlet and an impurity discharge port. The impurity discharge port is arranged at the bottom of the cylinder body, and the height of the gas outlet is higher than that of the impurity discharge port. A vertically extending rotating rod is rotatably connected in the cylinder body, and spiral blades are arranged on the rotating rod; a sprayer, which is installed on the cylinder body and is used for spraying water into the gas inlet; and a sulfur recovery device. The feeding pipeline of the sulfur recovery device is communicated with the impurity discharge port. The sulfur recovery device includes a filter cloth and a vacuum pumping device. The vacuum pumping port of the vacuum pumping device faces the filter cloth, and the vacuum pumping device is used for pumping the liquid on the filter cloth away. The filter cloth is used for collecting sulfur particles introduced into the sulfur recovery device.

[0006] In one embodiment, the lower part of the cylinder body is a conical cylinder part, the inner diameter of the conical cylinder part gradually decreases from top to bottom, and the impurity discharge port is arranged at the bottom of the conical cylinder part.

[0007] In one embodiment, the sprayer includes a pressurized atomization device, and the sprayer is communicated with a first container. Demineralized water is contained in the first container, and the pressurized atomization device is used for pressurizing and atomizing the demineralized water in the first container.

[0008] In one embodiment, the sulfur recovery device further includes a pressing roller and a scraper. The filter cloth is in a ring structure surrounding the outside of the vacuum pumping device, and the filter cloth can circulate and rotate around the vacuum pumping device. The pressing roller and the scraper are both located above the vacuum pumping device, and the pressing roller and the scraper are arranged at intervals along the advancing direction of the filter cloth. The pressing roller is used for pressing the filter cloth downward to fit with the vacuum pumping device, and the scraper is used for scraping the sulfur on the upper surface of the filter cloth.

[0009] In one embodiment, the sulfur recovery device includes a plurality of guide rollers and at least one tension roller. The guide rollers and the tension roller unfold the filter cloth, and the position of the mounting shaft of the tension roller is adjustable to adjust the tightness of the filter cloth.

[0010] In one embodiment, the sulfur recovery device further includes a driving belt. The driving belt is arranged between the filter cloth and the vacuum pumping device. The driving belt is connected with a driving wheel, and the driving wheel is used to drive the driving belt to rotate in a cycle, so as to drive the filter cloth to rotate in a cycle through the driving belt.

[0011] In one embodiment, the sulfur recovery device further includes a plurality of flushing ports facing the filter cloth.

[0012] In one embodiment, a slurry pump is further arranged between the sulfur recovery device and the cyclone separator.

[0013] In one embodiment, a liquid collecting tank is further arranged between the sulfur recovery device and the cyclone separator.

[0014] In one embodiment, the cylinder body and the spiral blades are made of nickel-based alloy.

[0015] Compared with the prior art, the advantages of the present utility model are that the external transmission natural gas at the air inlet can be sprayed through the sprayer arranged on the cylinder body, so that water vapor adheres to the surface of the solid particles carried by the external transmission natural gas, increasing the gravity of the solid impurities. When the external transmission natural gas is introduced into the cyclone separator, the solid particles sink under the action of gravity, while the gaseous natural gas generates a gas swirl under the guidance of the spiral blades. The rotating air flow gradually flows towards the center and finally flows out of the cylinder body from the air outlet. The cyclone separator can separate the gas and solid in the external transmission natural gas and remove the sulfur dust carried by the natural gas.

[0016] The sulfur dust particles are discharged from the impurity discharge port below the cylinder body to the sulfur recovery device. The vacuum pumping device below the filter cloth is used to pump the water vapor in the impurities downward, while the solid sulfur dust remains above the filter cloth. The sulfur is recovered by collecting the sulfur dust above the filter cloth. It can not only quickly remove the water vapor attached to the sulfur dust, improve the sulfur recovery efficiency, but also avoid heating the sulfur dust, reducing the risk of sulfur sublimation due to high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Hereinafter, the present utility model will be described in more detail based on embodiments and with reference to the drawings.

[0018] Figure 1 is a schematic structural diagram of the external transmission natural gas purification device in the embodiment of the present utility model;

[0019] Figure 2 is a schematic structural diagram of the cyclone separator in the embodiment of the present utility model;

[0020] Figure 3 This is a schematic structural diagram of a sulfur recovery device in an embodiment of the present utility model.

[0021] Reference numerals:

[0022] 100, cyclone separator;

[0023] 110, cylinder body; 111, gas inlet; 112, gas outlet; 113, impurity discharge port; 114, conical cylinder section; 120, rotating rod; 121, spiral blade;

[0024] 200, sprayer;

[0025] 300, sulfur recovery device; 301, filter cloth; 302, vacuum pumping equipment; 303, pressing roller; 304, scraper; 305, guiding roller; 306, tensioning roller; 307, driving belt; 308, driving wheel; 309, flushing port;

[0026] 400, slurry pump;

[0027] 500, liquid collecting tank. Specific implementation manners

[0028] The present utility model will be further described below in conjunction with the accompanying drawings.

[0029] See Figure 1 As shown, an embodiment of the present utility model provides an external transmission natural gas purification device, which includes a cyclone separator 100, a sprayer 200, and a sulfur recovery device 300.

[0030] See Figure 1 As Figure 2 shown, the cylinder body 110 of the cyclone separator 100 is provided with a gas inlet 111. During use, the external transmission natural gas is led to the gas inlet 111 of the cylinder body 110. Since a vertically extending rotating rod 120 is rotatably connected inside the cylinder body 110, and spiral blades 121 are arranged on the rotating rod 120. The external transmission natural gas entering the cylinder body 110 forms a cyclone under the guidance of the spiral blades 121 and gradually moves towards the center of the cylinder body 110; solid particles (such as sulfur dust, etc.) move radially outwards under the action of centrifugal force and gradually fall with gravity. That is to say, the external transmission natural gas containing solid impurities can achieve gas-solid separation in the cyclone separator 100, so that the natural gas of the gas is discharged from the upper gas outlet 112, while the sulfur dust will fall to the impurity discharge port 113 under the action of gravity.

[0031] Among them, the sprayer 200 is installed on the cylinder body 110 of the cyclone separator 100. Water is sprayed through the sprayer 200 into the gas inlet 111 of the cylinder body 110, so that the solid sulfur dust adheres to water vapor on the outside and its weight increases, promoting the fall of the sulfur dust and improving the efficiency of separating sulfur dust from the exported natural gas.

[0032] The feed pipe of the sulfur recovery device 300 is connected to the impurity discharge port 113 of the cylinder body 110, so that the sulfur dust separated by the cyclone separator 100 will flow into the sulfur recovery device 300 for recovery. The sulfur recovery device 300 includes a filter cloth 301 and a vacuum pumping device 302. The vacuum pumping port of the vacuum pumping device 302 faces the filter cloth 301, and the liquid on the filter cloth 301 is pumped away through the vacuum pumping device 302 to reduce the moisture of the sulfur particles, and the sulfur particles introduced into the sulfur recovery device 300 are collected through the filter cloth 301.

[0033] That is to say, the embodiment of the present application can not only separate the sulfur dust in the exported natural gas through the cyclone separator 100, but also remove the water vapor attached to the sulfur dust by using the vacuum pumping device 302 to obtain relatively dry sulfur dust. Removing the water vapor attached to the sulfur dust by vacuum pumping not only has a high drying efficiency, but also avoids the sublimation of sulfur due to heat, reduces the loss of sulfur in the drying process, and improves the recovery rate of sulfur.

[0034] In some implementation manners, the filter cloth 301 is in a ring structure, and the vacuum pumping device 302 is arranged inside the filter cloth 301 for pumping away the water vapor outside the filter cloth 301. In other implementation manners, the filter cloth 301 can also be set as a plate-shaped or sheet-shaped structure. The upper side of the filter cloth 301 faces the feed pipe of the sulfur recovery device 300, and the vacuum pumping device 302 is arranged on the lower side of the filter cloth 301 to pump away the moisture on the upper side of the filter cloth 301 through the vacuum pumping device 302.

[0035] In summary, the embodiment of the present application provides an exported natural gas purification device that can fully recover solid sulfur in the exported natural gas, and can obtain solid sulfur during the process of purifying natural gas, bringing additional benefits.

[0036] See Figure 2 As shown, in some embodiments, the lower part of the cylinder body 110 is a conical cylinder section 114, the inner diameter of the conical cylinder section 114 gradually decreases from top to bottom, and the impurity discharge port 113 is arranged at the bottom of the conical cylinder section 114. Through the conical cylinder section 114, not only can the flow direction of the natural gas flow be restricted to promote the natural gas to flow along the cylinder wall to form a cyclone, but also the sulfur dust attached with spray water can be guided downward to the impurity discharge port 113.

[0037] Such as Figure 2As shown, in some implementations, the gas outlet 112 is disposed at the top of the cylinder 110 and close to the vertical axis of the cylinder 110 , and the gas gradually flows into the gas outlet 112 when flowing along the spiral blades 121 toward the central axis of the cylinder 110 .

[0038] In some implementations, the sprayer 200 includes a pressurized atomization device, and the sprayer 200 is connected to a first container, the first container contains desalted water, and the pressurized atomization device is used to pressurize and atomize the desalted water in the first container. Desalted water refers to the finished water obtained after removing suspended matter, colloids, and inorganic cations, anions and other impurities in water. Due to the low content of ions in desalted water, it is difficult to form scale impurities, which avoids the mixing of scale impurities in sulfur dust and reduces the purity of recovered sulfur. The desalted water can be atomized into fine water vapor through the pressurized atomization device, so that the desalted water is more evenly attached to the sulfur dust carried by natural gas, thereby promoting the separation of sulfur dust from natural gas.

[0039] See also Figure 1 as well as Figure 3 As shown, in some implementations, the sulfur recovery device 300 also includes a pressing roller 303 and a scraper 304, the filter cloth 301 is in an annular structure surrounding the outside of the vacuum device 302, and the filter cloth 301 can circulate around the vacuum device 302, the pressing roller 303 and the scraper 304 are both located above the vacuum device 302, the pressing roller 303 and the scraper 304 are spaced apart along the forward direction of the filter cloth 301, the pressing roller 303 is used to press the filter cloth 301 downward until the filter cloth 301 is in contact with the vacuum device 302, and the scraper 304 is used to scrape the sulfur on the upper surface of the filter cloth 301.

[0040] In some implementations, a flow equalizer is provided in front of the scraper 304, the flow equalizer is parallel to the scraper box, and a plurality of channels are provided on the flow equalizer, which can separate a large volume of solid into a plurality of small volume particles to avoid the accumulation of solid sulfur.

[0041] In some implementations, a scraper 304 with a shovel-shaped structure may be used, and the scraper 304 may be connected to a lifting device. When collecting sulfur on the filter cloth 301, the sulfur is received by the shovel-shaped scraper 304. When the sulfur received by the scraper 304 reaches the maximum load capacity of the scraper 304, the filter cloth 301 is controlled to stop rotating, and the shovel-shaped scraper 304 is raised by the lifting device to collect the sulfur on the scraper 304.

[0042] That is, the filter cloth 301 can be circulated and rotated like a conveyor belt to realize the transfer and transportation of sulfur above the filter cloth 301. By scraping the upper surface of the filter cloth 301 by the scraper 304, the sulfur on the filter cloth 301 can be gathered on the front side of the scraper 304, which is convenient for subsequent collection of sulfur. The filter cloth 301 can be pressed downward by the pressing roller 303, so that the filter cloth 301 is attached to the outside of the vacuum device 302, thereby improving the efficiency of the vacuum device 302 in extracting water vapor above the filter cloth 301.

[0043] It can be understood that the inflow pipe of the sulfur recovery device 300 is arranged between the pressing roller 303 and the scraper 304 , and the conveying direction of the filter cloth 301 is the same as the direction from the pressing roller 303 to the scraper 304 .

[0044] See also Figure 3 As shown, in some implementations, the sulfur recovery device 300 includes a plurality of guide rollers 305 and at least one tensioning roller 306. The guide rollers 305 cooperate with the tensioning roller 306 to open the filter cloth 301, and the mounting shaft position of the tensioning roller 306 is adjustable to adjust the tightness of the filter cloth 301. In other words, the filter cloth 301 can be adjusted to a relaxed state or a tightened state by moving the position of the mounting shaft of the tensioning roller 306. When the filter cloth 301 needs to be replaced, the filter cloth 301 can be adjusted to a relaxed state by adjusting the tensioning roller 306, thereby reducing the difficulty of replacing the filter cloth 301. When sulfur needs to be recovered, the filter cloth 301 can be adjusted to a tightened state by moving the position of the mounting shaft of the tensioning roller 306, so as to avoid the wrinkles of the filter cloth 301 affecting the normal operation of the scraper 304.

[0045] See also Figure 3 As shown, in some implementations, the sulfur recovery device 300 also includes a driving belt 307, which is arranged between the filter cloth 301 and the vacuum device 302. The driving belt 307 is connected to a driving wheel 308, and the driving wheel 308 is used to drive the driving belt 307 to rotate in a circular motion, thereby driving the filter cloth 301 to rotate in a circular motion through the driving belt 307.

[0046] That is to say, in the present application, the friction between the driving belt 307 and the filter cloth 301 is actually used to drive the filter cloth 301 to circulate, and the filter cloth 301 only needs to be pressed down by the pressing roller 303 so that the filter cloth 301 is close to the driving belt 307. The friction of the filter cloth 301 can be increased by providing anti-slip patterns on the driving belt 307. Compared with directly assembling the filter cloth 301 outside the driving wheel 308, the friction of the filter cloth 301 can be relatively uniform and dispersed at various locations, thereby avoiding deformation or breakage of the filter cloth 301 caused by concentrated friction.

[0047] In some implementations, multiple filter cloths 301 can be arranged side by side on the drive belt 307, reducing the replacement cost of a single filter cloth 301. At the same time, it can avoid frequent replacement of the filter cloth 301 in less polluted areas, reducing the loss cost of the filter cloth 301. For example, three filter cloths 301 can be arranged side by side on the drive belt 307. The central filter cloth 301 will be sulfur-polluted faster because it is closer to the feed pipe of the sulfur recovery device 300, while the filter cloths 301 on both sides will be polluted slower due to relatively less sulfur. In actual use, it is possible to only increase the replacement frequency of the central filter cloth 301 while reducing the replacement times of the filter cloths 301 on both sides, reducing the loss of the filter cloth 301.

[0048] See Figure 3 As shown, in some implementations, the sulfur recovery device 300 further includes a plurality of flushing ports 309 that face the filter cloth 301. By spraying water through the flushing ports 309 onto the filter cloth 301, the cleaning of the filter cloth 301 can be achieved, avoiding the accumulation of impurities on the filter cloth 301. The outer surface of the filter cloth 301 can be divided into a sulfur collection area and a non-sulfur collection area. The sulfur collection area specifically refers to the area between the pressing roller 303 and the scraper 304. In this embodiment, the flushing ports 309 face the non-sulfur collection area of the outer surface of the filter cloth 301, avoiding the water sprayed from the cleaning ports from wetting the sulfur in the sulfur collection area.

[0049] See Figure 1 As shown, in some implementations, a slurry pump 400 is further provided between the sulfur recovery device 300 and the cyclone separator 100. The slurry pump 400 can be used to transport the solid-liquid mixture formed by the spray water and sulfur dust.

[0050] See Figure 1 As shown, in some implementations, a liquid collection tank 500 is further provided between the sulfur recovery device 300 and the cyclone separator 100. The inlet side of the liquid collection tank 500 is connected to the impurity discharge port 113, and the outlet side of the liquid collection tank 500 is connected to the feed pipe of the sulfur recovery device 300, and the height of the outlet of the liquid collection tank 500 is higher than the height of the bottom surface of the liquid collection tank 500. When the solid-liquid mixture is introduced into the liquid collection tank 500, due to the fact that the height of the outlet of the liquid collection tank 500 is higher than the height of the bottom surface of the liquid collection tank 500, the mixture will gather at the bottom of the liquid collection tank 500 and form a layer with solids at the bottom and liquid on top, initially separating the sulfur particles from the water. Then, the upper liquid in the mixture is guided into the sulfur recovery device 300 through the outlet of the liquid collection tank 500, and the sulfur particles carried in the liquid are separated by the sulfur recovery device 300.

[0051] In some implementations, a control valve may also be provided at the outlet of the liquid collecting tank 500 to adjust the state of the control valve and the working state of the sulfur recovery device 300 according to the liquid level height of the liquid collecting tank 500. The control valve and the sulfur recovery device 300 are only opened after the liquid level height in the liquid collecting tank 500 is higher than a threshold value, so as to shorten the working time of the sulfur recovery device 300 and extend the service life of the vacuum pumping device 302.

[0052] In some implementations, the cylinder body 110 and the spiral blade 121 are made of a nickel-based alloy. The nickel-based alloy has good corrosion resistance, avoiding being corroded by sulfur during use.

[0053] Although the present utility model has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present utility model. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A natural gas purification device for external transmission, characterized in that: It includes: A cyclone separator, wherein the cyclone separator comprises a cylinder, wherein the cylinder is formed with an air inlet, an air outlet and an impurity discharge outlet, wherein the impurity discharge outlet is arranged at the bottom of the cylinder, wherein the height of the air outlet is higher than the height of the impurity discharge outlet, wherein a vertically extending rotating rod is rotatably connected in the cylinder, and wherein the rotating rod is provided with spiral blades; a sprayer, mounted on the cylinder, for spraying water toward the air inlet; and A sulfur recovery device, wherein the feed pipe of the sulfur recovery device is connected to the impurity discharge port, the sulfur recovery device comprises a filter cloth and a vacuum device, the vacuum port of the vacuum device faces the filter cloth, the vacuum device is used to extract the liquid on the filter cloth, and the filter cloth is used to collect sulfur particles passing into the sulfur recovery device.

2. The natural gas purification equipment for export according to claim 1, characterized in that: The lower part of the cylinder is a conical cylinder part, the inner diameter of which gradually decreases from top to bottom, and the impurity discharge port is arranged at the bottom of the conical cylinder part.

3. The natural gas purification equipment for export according to claim 1, characterized in that: The sprayer comprises a pressurized atomizing device, and the sprayer is connected to a first container, wherein the first container contains desalted water, and the pressurized atomizing device is used for pressurizing and atomizing the desalted water in the first container.

4. The natural gas purification equipment for export according to any one of claims 1 to 3, characterized in that: The sulfur recovery device also includes a pressing roller and a scraper. The filter cloth is in an annular structure surrounding the outside of the vacuum equipment, and the filter cloth can circulate around the vacuum equipment. The pressing roller and the scraper are both located above the vacuum equipment, and the pressing roller and the scraper are spaced apart along the forward direction of the filter cloth. The pressing roller is used to press the filter cloth downward to fit it to the vacuum equipment, and the scraper is used to scrape the sulfur on the upper surface of the filter cloth.

5. The natural gas purification equipment for export according to claim 4, characterized in that: The sulfur recovery device comprises a plurality of guide rollers and at least one tensioning roller. The guide rollers and the tensioning roller stretch the filter cloth. The mounting shaft position of the tensioning roller is adjustable to adjust the tightness of the filter cloth.

6. The natural gas purification equipment for export according to claim 4, characterized in that: The sulfur recovery device also includes a driving belt, which is arranged between the filter cloth and the vacuum pumping device. The driving belt is connected to a driving wheel, and the driving wheel is used to drive the driving belt to rotate cyclically, thereby driving the filter cloth to rotate cyclically through the driving belt.

7. The natural gas purification equipment for export according to claim 4, characterized in that: The sulfur recovery device further comprises a plurality of flushing ports, wherein the flushing ports face the filter cloth.

8. The natural gas purification equipment for export according to any one of claims 1 to 3, characterized in that: A slurry pump is also provided between the sulfur recovery device and the cyclone separator.

9. The natural gas purification equipment for export according to any one of claims 1 to 3, characterized in that: A liquid collecting tank is also arranged between the sulfur recovery device and the cyclone separator.

10. The natural gas purification equipment for export according to any one of claims 1 to 3, characterized in that: The cylinder and the spiral blades are made of nickel-based alloy.

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