Natural gas drying device

Abstract

The invention relates to the technical field of natural gas drying, in particular to a natural gas drying device which comprises a supporting frame, a condensation assembly, a mist catching assembly and two adsorption assemblies, the condensation assembly comprises a condensation tank and a spiral pipe, the mist catching assembly comprises a mist catching tank and a mist catching mechanism, and each adsorption assembly comprises an adsorption tank and an adsorption sieve. A backflow pipe is arranged on the outer wall of each adsorption tank, a control gas circuit is arranged above the mist catching tank, a circulation gas circuit is arranged below the mist catching tank, a backflow gas circuit is arranged between each adsorption tank and the condensation tank, and a cooling circulation mechanism is arranged on the supporting frame. According to the device, natural gas can circularly flow in the two adsorption tanks through the control gas path and the circulating gas path, residual moisture of the natural gas containing moisture in the adsorption tanks can be removed by the adsorption sieves, and the dried natural gas can dry the adsorption sieves in the adsorption tanks, so that the adsorption sieves can be regenerated; and finally, the whole drying process is continuous and environment-friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas drying, and in particular to a natural gas drying device. Background Art

[0002] Natural gas is a gaseous fossil fuel mainly composed of methane. It is mainly found in oil fields and natural gas fields, and a small amount is also found in coal seams. Natural gas is one of the safer fuels. It does not contain carbon monoxide and is lighter than air. Once leaked, it will immediately spread upwards and is not easy to accumulate to form explosive gas. It is relatively safe.

[0003] Natural gas often contains a certain amount of water during the extraction, processing and transportation process. The presence of this water will bring many problems, such as accelerating internal corrosion of pipelines, shortening the service life of pipelines, forming natural gas hydrates, blocking pipelines and valves, affecting the safe operation of pipelines, reducing the quality of natural gas supply, and affecting the normal use of users. The existing Chinese patent with publication number CN114106899A discloses a natural gas drying device, but the patent also has the following defects: First, when the natural gas in the cylinder passes through the spiral tube, the water in the natural gas will be condensed into liquid. However, since the natural gas flows from bottom to top in the spiral tube, the water in the spiral tube will be driven by the natural gas to flow upward, and finally the water in the spiral tube will be difficult to flow downward to the lower end of the cylinder for centralized discharge. Secondly, after the molecular sieve in the box absorbs the moisture contained in the natural gas, since the moisture in the molecular sieve cannot be removed by itself, the subsequent adsorption capacity of the molecular sieve to moisture will be reduced, and eventually the molecular sieve will lose its function of adsorbing moisture. Summary of the invention

[0004] Based on this, it is necessary to provide a natural gas drying device to address the existing technical problems.

[0005] In order to solve the problems of the prior art, the technical scheme adopted by the present invention is as follows: a natural gas drying device comprises a support frame, a condensation component, a fog collecting component and two groups of adsorption components, the condensation component comprises a condensation tank and a spiral tube, the condensation tank is vertically fixed on the support frame, the spiral tube is vertically wound in the condensation tank, the upper and lower ends of the spiral tube are respectively connected with an air inlet pipe and an air outlet pipe passing through the outside of the condensation tank, the outer wall of the condensation tank is provided with a water outlet and a water inlet distributed up and down, the fog collecting component comprises a fog collecting tank and a fog collecting mechanism, the fog collecting tank is vertically fixed on the side of the condensation tank, the lower end of the fog collecting tank is provided with a drain pipe, the fog collecting mechanism is arranged in the fog collecting tank, and the two groups of adsorption components are about the fog collecting tank. The fog tank is in a symmetrical state. Each group of adsorption components includes a vertical adsorption tank and an adsorption screen arranged in the adsorption tank. A reflux pipe located above the adsorption screen is provided on the outer wall of the adsorption tank. A control air path connecting the fog catcher tank with the two adsorption tanks is provided above the fog catcher tank. A circulating air path connecting the two adsorption tanks is provided below the fog catcher tank. A heater is provided on the circulating air path, and exhaust pipes located on both sides of the heater are connected to the circulating air path. A reflux air path connecting the reflux pipe and the air inlet pipe is provided between each adsorption tank and the condensation tank. A cooling circulation mechanism is provided on the support frame. Water discharged from the condensation tank and the fog catcher tank is discharged back into the condensation tank through the cooling circulation mechanism.

[0006] Furthermore, the fog collecting mechanism includes a fog collecting pipe and a plurality of hollow conical disks. The fog collecting pipe is vertically fixed on the top of the fog collecting tank. The upper end of the fog collecting pipe is extended out of the fog collecting tank, and the lower end of the fog collecting pipe is inserted into the fog collecting tank. A filter is fixed inside the lower end of the fog collecting pipe. A plurality of hollow conical disks are evenly distributed below the fog collecting pipe in the vertical direction. Each hollow conical disk is fixedly connected to the inner wall of the fog collecting tank. The conical end of each hollow conical disk faces downward. A ventilation pipe is formed on the outer wall of the fog collecting tank. The ventilation pipe is connected to the exhaust pipe through a No. 1 connecting pipe.

[0007] Furthermore, a vertical water pipe is formed at the bottom of the fog catching tank, the upper end of the water pipe extends into the fog catching tank, the lower end of the water pipe is extended out of the fog catching tank, a plurality of water grooves are opened on the outer wall of the upper end of the water pipe, a floating valve is provided in the upper end of the water pipe, the floating valve includes a valve pin, a sliding rod and a conical floating disk, the valve pin coaxially slides in the upper end of the water pipe, and a plurality of water grooves are blocked by the valve pin, a retaining ring for limiting the downward movement of the valve pin is formed on the inner wall of the water pipe, a sealing cover is fixedly provided on the top of the water pipe, the sliding rod is coaxially formed on the top of the valve pin, the sliding rod coaxially passes through the sealing cover upward, the conical floating disk is coaxially formed on the top of the sliding rod, and the conical end of the conical floating disk faces upward.

[0008] Furthermore, the control air circuit includes a No. 1 lifting pump, a No. 2 connecting pipe, a No. 3 connecting pipe, a No. 1 check valve and a No. 2 check valve. An air inlet is provided on the top of each adsorption tank. The No. 1 lifting pump is arranged at the upper end of the mist catching pipe. The No. 2 connecting pipe connects the air inlet of one of the adsorption tanks with the No. 1 lifting pump. The No. 3 connecting pipe connects the air inlet of another adsorption tank with the No. 1 lifting pump. The No. 1 check valve is arranged on the No. 2 connecting pipe, and the No. 2 check valve is arranged on the No. 3 connecting pipe.

[0009] Furthermore, the circulating gas circuit includes a No. 4 connecting pipe, a No. 5 connecting pipe, a No. 3 non-return valve and a No. 4 non-return valve. An air outlet is provided at the bottom of each adsorption tank, and a No. 2 lifting pump is provided on each air outlet. The heater is fixed on the support frame. The No. 4 connecting pipe connects the heater to one of the No. 2 lifting pumps, and the No. 5 connecting pipe connects the heater to another No. 2 lifting pump. The No. 3 non-return valve is arranged on the No. 4 connecting pipe, and the No. 4 non-return valve is arranged on the No. 5 connecting pipe. The two exhaust pipes are respectively connected to the No. 4 connecting pipe and the No. 5 connecting pipe, and each exhaust pipe is provided with an exhaust non-return valve.

[0010] Furthermore, each return gas circuit includes a No. 6 connecting pipe, a No. 3 lifting pump, a No. 5 one-way valve and a No. 6 one-way valve. The two ends of the No. 6 connecting pipe are respectively connected to the return pipe and the intake pipe. The No. 3 lifting pump is arranged on the No. 6 connecting pipe. The No. 5 one-way valve is arranged at the connection between the No. 6 connecting pipe and the return pipe. The No. 6 one-way valve is arranged at the connection between the No. 6 connecting pipe and the intake pipe.

[0011] Furthermore, the cooling circulation mechanism includes a warm water tank, a cold water tank, a cooler, water pump No. 1, water pump No. 2 and water pump No. 3. The warm water tank, the cold water tank and the cooler are all fixed on a support frame. The water pipe is connected to the warm water tank. The water outlet is connected to the warm water tank through a No. 7 connecting pipe. The warm water tank is connected to the cooler through water pump No. 1. The cooler is connected to the cold water tank through water pump No. 2. The cold water tank is connected to the water inlet through water pump No. 3.

[0012] Furthermore, a No. 7 one-way valve is provided on the drainage pipe, and a No. 4 water pump is provided on the support frame, and the No. 4 water pump connects the No. 7 one-way valve and the warm water tank.

[0013] Compared with the prior art, the present invention has the following beneficial effects: First, when using the device, the natural gas flows from top to bottom in the spiral tube, so that when the condensed water in the condenser condenses the natural gas in the spiral tube, the formed condensed water will be carried by the natural gas into the fog catcher smoothly, and the gas entering the fog catcher will be dried twice, and the removed water will be concentrated at the bottom of the fog catcher, and the water in the fog catcher will be discharged in a concentrated manner later; Secondly, the device controls the gas path and the circulating gas path to allow the natural gas to circulate in the two adsorption tanks. The natural gas containing moisture will be removed by the adsorption screen in the adsorption tank, and the dried natural gas will dry the adsorption screen in the adsorption tank, so that the adsorption screen can be regenerated, ultimately ensuring that the entire drying process is continuous and environmentally friendly; Thirdly, the condensed water in the condensation tank circulates through a cooling circulation mechanism, and the discharge direction of the condensed water is opposite to the flow direction of the natural gas. Thus, when the natural gas flows downward in the spiral tube, it will be cooled by the condensed water that continuously flows upward, thereby ensuring the cooling efficiency of the condensed water. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the three-dimensional structure of the embodiment Figure 1 ; Figure 2 yes Figure 1 A1 is a partial enlarged schematic diagram; Figure 3 yes Figure 1 A2 is a partial enlarged schematic diagram; Figure 4 Schematic diagram of the three-dimensional structure of the embodiment Figure 2 ; Figure 5 yes Figure 4 A3 is a partial enlarged schematic diagram; Figure 6 yes Figure 4 A4 is a partial enlarged schematic diagram; Figure 7 It is a three-dimensional structural diagram of the control gas path and the return gas path; Figure 8 It is a three-dimensional structural schematic diagram of the circulating gas circuit; Fig. 9 This is a schematic diagram of the three-dimensional structure of the cooling cycle mechanism. Figure 1 ; Fig.10 This is a schematic diagram of the three-dimensional structure of the cooling cycle mechanism. Figure 2 ; Fig.11 It is a top view of the condensation tank; Fig.12 yes Fig.11 Section view along line AA; Fig.13 It is a top view of the fog catching tank; Fig.14 yes Fig.13 Sectional view along line BB; Fig.15 yes Fig.14 A partial enlarged schematic diagram indicated by A5; Fig.16 It is a top view of the adsorption tank; Fig.17 yes Fig.16 Cross-sectional view along line CC.

[0015] The numbers in the figure are: 1, support frame; 2, condenser tank; 3, spiral tube; 4, air inlet pipe; 5, air outlet pipe; 6, water outlet; 7, water inlet; 8, fog catching tank; 9, drain pipe; 10, adsorption tank; 11, adsorption screen; 12, reflux pipe; 13, heater; 14, exhaust pipe; 15, fog catching pipe; 16, hollow conical disk; 17, filter screen; 18, ventilation pipe; 19, No. 1 connecting pipe; 20, water pipe; 21, water trough; 22, valve pin; 23, slide rod; 24, conical floating plate; 25, retaining ring; 26, sealing cover; 27, No. 1 lifting pump; 28, No. 2 connecting pipe; 29. Connecting pipe No. 3; 30. Check valve No. 1; 31. Check valve No. 2; 32. Air inlet; 33. Connecting pipe No. 4; 34. Connecting pipe No. 5; 35. Check valve No. 3; 36. Check valve No. 4; 37. Air outlet; 38. Lifting pump No. 2; 39. Exhaust check valve; 40. Connecting pipe No. 6; 41. Lifting pump No. 3; 42. Check valve No. 5; 43. Check valve No. 6; 44. Warm water tank; 45. Cold water tank; 46. Cooler; 47. Water pump No. 1; 48. Water pump No. 2; 49. Water pump No. 3; 50. Connecting pipe No. 7; 51. Check valve No. 7; 52. Water pump No. 4. DETAILED DESCRIPTION

[0016] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] refer to Figures 1 to 17 The natural gas drying device shown in the figure comprises a support frame 1, a condensation component, a mist collection component and two sets of adsorption components. The condensation component comprises a condensation tank 2 and a spiral tube 3 (such as Fig.12As shown in the figure, the condensation tank 2 is vertically fixed on the support frame 1, the spiral tube 3 is wound in the condensation tank 2 along the vertical direction, the upper and lower ends of the spiral tube 3 are respectively connected with the air inlet pipe 4 and the air outlet pipe 5 passing through the outside of the condensation tank 2, and the outer wall of the condensation tank 2 is provided with a water outlet 6 and a water inlet 7 distributed up and down. The fog catching component includes a fog catching tank 8 and a fog catching mechanism. The fog catching tank 8 is vertically fixed on the side of the condensation tank 2, and a drain pipe 9 is provided at the lower end of the fog catching tank 8. The fog catching mechanism is arranged in the fog catching tank 8. The two groups of adsorption components are symmetrical about the fog catching tank 8, and each group of adsorption components includes a vertical adsorption tank 10 and an adsorption screen 1 arranged in the adsorption tank 10. 1. A reflux pipe 12 located above the adsorption screen 11 is provided on the outer wall of the adsorption tank 10, a control gas path connecting the fog catcher tank 8 with the two adsorption tanks 10 is provided above the fog catcher tank 8, a circulating gas path connecting the two adsorption tanks 10 is provided below the fog catcher tank 8, a heater 13 is provided on the circulating gas path, and exhaust pipes 14 located on both sides of the heater 13 are connected to the circulating gas path, a reflux gas path for connecting the reflux pipe 12 and the air inlet pipe 4 is provided between each adsorption tank 10 and the condensation tank 2, a cooling circulation mechanism is provided on the support frame 1, and the water discharged from the condensation tank 2 and the fog catcher tank 8 is discharged back into the condensation tank 2 through the cooling circulation mechanism.

[0018] The natural gas is dried three times through this device. The condensation component is used for the first drying of the natural gas, the mist collection component is used for the second drying of the natural gas, and the adsorption component is used for the third drying of the natural gas. After the three dryings, all the moisture in the natural gas will be removed. The specific drying process is as follows: The condenser 2 is filled with condensed water in advance, and the natural gas containing water is injected into the spiral tube 3 through the air inlet pipe 4. The natural gas will flow downward in the spiral tube 3. During the flow of the natural gas in the spiral tube 3, the condensed water stored in the condenser 2 will condense the water vapor in the natural gas. The water vapor will become liquefied water after condensation. The liquefied water will flow along the spiral tube 3 to the outlet pipe 5 along the natural gas. Thereafter, the natural gas will drive the liquefied water into the mist catcher 8 through the outlet pipe 5. After entering the mist catcher 8, the liquefied water will fall to the bottom of the mist catcher 8 due to gravity, and the natural gas will flow upward after entering the mist catcher 8. During the upward flow of the natural gas, the liquid droplets carried by the natural gas are removed by the mist catcher mechanism. After the liquid droplets are removed, The natural gas enters the control gas path. Since the two adsorption tanks 10 have the same structure, for the convenience of distinction, the two adsorption tanks 10 are set to be A tank and B tank respectively. When the natural gas enters the control gas path, the control gas path will pass the natural gas into the A tank. The natural gas flowing into the A tank will pass through the adsorption screen 11. The adsorption screen 11 will remove all the remaining water in the natural gas. After that, the natural gas will flow from the adsorption tank 10 into the circulation gas path. A part of the natural gas entering the circulation gas path will be discharged through the exhaust pipe 14. The natural gas discharged from the exhaust pipe 14 has been dried three times to remove all the water. The other part of the natural gas will enter the B tank after passing through the heater 13. The natural gas entering the B tank will pass through the adsorption screen 11 after returning to the circulation gas path. The natural gas discharged from the B tank and the natural gas continuously introduced into the spiral tube 3 will converge in the intake pipe 4, and enter the fog collecting tank 8 again after passing through the spiral tube 3. At this time, the natural gas discharged from the fog collecting tank 8 will enter the B tank through the control gas path, so that part of the natural gas discharged from the B tank will be discharged through the exhaust pipe 14, and the other part of the natural gas will enter the A tank through the heater 13. At this time, the natural gas entering the A tank will dry the adsorption screen 11 in the A tank, so as to achieve the regeneration of the adsorption screen 11. Thereafter, the natural gas in the A tank will flow into the intake pipe 4 again through the return pipe 12 and the return gas path. In summary, after the natural gas is dried three times, a Part of the dried natural gas will be discharged, while the other part of the dried natural gas will circulate on the adsorption screens 11 in the two adsorption tanks 10, so that the moisture in the adsorption screen 11 is taken out by the dry and hot natural gas, and finally the adsorption screen 11 is regenerated, so that the natural gas drying process of the device is continuous and environmentally friendly. When the cooling water in the condensation tank 2 condenses the natural gas in the spiral tube 3, the condensed water in the condensation tank 2 is circulated through the cooling circulation mechanism, that is, the condensed water will be discharged into the condensation tank 2 from the bottom through the cooling circulation mechanism, and the condensed water in the condensation tank 2 will be discharged from the condensation tube into the cooling circulation mechanism, so that the condensation effect of the natural gas in the spiral tube 3 is ensured by the circulation of the condensed water.

[0019] In order to show the specific structure of the fog capture mechanism, the following features are set: The fog collecting mechanism includes a fog collecting pipe 15 and a plurality of hollow conical disks 16. The fog collecting pipe 15 is vertically fixed on the top of the fog collecting tank 8. The upper end of the fog collecting pipe 15 is extended outside the fog collecting tank 8, and the lower end of the fog collecting pipe 15 penetrates into the fog collecting tank 8. A filter screen 17 (such as Fig.14 As shown in the figure, a plurality of hollow conical disks 16 are evenly distributed below the fog catching pipe 15 in the vertical direction, each hollow conical disk 16 is fixedly connected to the inner wall of the fog catching tank 8, and the conical end of each hollow conical disk 16 faces downward. A ventilation pipe 18 is formed on the outer wall of the fog catching tank 8, and the ventilation pipe 18 is connected to the air outlet pipe 5 through a No. 1 connecting pipe 19.

[0020] The condensed natural gas will be discharged into the fog catching tank 8 from the bottom through the No. 1 connecting pipe 19. The natural gas entering the fog catching tank 8 will pass through a number of hollow conical disks 16 in sequence. During this process, the liquid droplets carried by the natural gas will adhere to the hollow conical disks 16, and the natural gas will pass through the hollow conical disks 16 to enter the fog catching pipe 15 upward. The liquid droplets attached to the hollow conical disks 16 will drip down along the hollow conical disks 16 to the bottom of the fog catching tank 8. The natural gas entering the fog catching pipe 15 will pass through the filter 17 to further remove the liquid droplets carried. The natural gas after the liquid droplets are removed will enter the control gas path, and then enter the three drying of the natural gas.

[0021] In order to prevent the water level in the mist catching tank 8 from continuing to rise, the following features are provided: A vertical water pipe 20 is formed at the bottom of the fog catching tank 8, the upper end of the water pipe 20 extends into the fog catching tank 8, and the lower end of the water pipe 20 is extended outside the fog catching tank 8. A plurality of water grooves 21 are provided on the outer wall of the upper end of the water pipe 20, and a floating valve is provided in the upper end of the water pipe 20. The floating valve includes a valve pin 22, a slide rod 23 and a conical floating disk 24. The valve pin 22 coaxially slides in the upper end of the water pipe 20, and the plurality of water grooves 21 are blocked by the valve pin 22. A retaining ring 25 for limiting the downward movement of the valve pin 22 is formed on the inner wall of the water pipe 20, and a sealing cover 26 is fixedly provided on the top of the water pipe 20. The slide rod 23 is coaxially formed on the top of the valve pin 22, and the slide rod 23 coaxially passes through the sealing cover 26 upward, and the conical floating disk 24 is coaxially formed on the top of the slide rod 23, and the conical end of the conical floating disk 24 faces upward.

[0022] In the initial state, the floating valve descends by gravity. During this process, the valve pin 22 slides downward in the lower end of the water pipe 20 and finally conflicts with the retaining ring 25. At this time, the valve pin 22 will block several water grooves 21. When the liquefied water level in the fog catcher 8 continues to rise, the conical floating plate 24 will rise due to the buoyancy of the water. The conical floating plate 24 will drive the valve pin 22 to rise through the slide rod 23, so that the water groove 21 blocked by the valve pin 22 will open, and the liquefied water in the fog catcher 8 will automatically leak into the water pipe 20, and finally the liquefied water in the fog catcher 8 will flow into the cooling circulation mechanism. In summary, when the liquefied water in the fog catcher 8 continues to increase, the water level in the fog catcher 8 is lowered by the floating valve arranged in the water pipe 20.

[0023] In order to show the specific structure of the control gas circuit, the following features are set: The control gas circuit includes a No. 1 lift pump 27, a No. 2 connecting pipe 28, a No. 3 connecting pipe 29, a No. 1 check valve 30 and a No. 2 check valve 31. The top of each adsorption tank 10 is provided with an air inlet 32 ​​(such as Fig.13 As shown in the figure, the No. 1 lifting pump 27 is arranged at the upper end of the mist catching pipe 15, the No. 2 connecting pipe 28 connects the air inlet 32 ​​of one of the adsorption tanks 10 with the No. 1 lifting pump 27, the No. 3 connecting pipe 29 connects the air inlet 32 ​​of the other adsorption tank 10 with the No. 1 lifting pump 27, the No. 1 one-way valve 30 is arranged on the No. 2 connecting pipe 28, and the No. 2 one-way valve 31 is arranged on the No. 3 connecting pipe 29.

[0024] The natural gas in the fog collecting tank 8 is accelerated to flow into the fog collecting pipe 15 through the No. 1 lifting pump 27. After the natural gas enters the control gas path, the No. 1 check valve 30 will first close the No. 2 connecting pipe 28, so that the No. 1 lifting pump 27 will introduce the natural gas in the fog collecting tank 8 into one of the adsorption tanks 10 through the No. 3 connecting pipe 29. At this time, the natural gas will be dried three times in the current adsorption tank 10. A part of the natural gas after drying will be discharged through the exhaust pipe 14, and the other part of the natural gas will enter another adsorption tank 10 through the circulating gas path, so that the water adsorbed by the adsorption screen 11 in the other adsorption tube is dried by the natural gas. Remove and regenerate the adsorption screen 11. After the natural gas has been circulated once, that is, after the natural gas has regenerated the adsorption screen 11 in the corresponding adsorption tank 10, the No. 1 one-way valve 30 will open the No. 2 connecting pipe 28, and the No. 2 one-way valve 31 will close the No. 3 connecting pipe 29, then the subsequent natural gas will be introduced into the corresponding adsorption tank 10 through the No. 2 connecting pipe 28. In summary, the natural gas will circulate in the two adsorption tanks 10 through the control gas path. After the adsorption screen 11 in the current adsorption tank 10 dries the natural gas, the dried natural gas will regenerate the adsorption screen 11 in the other adsorption tank 10.

[0025] In order to show the specific structure of the circulating gas circuit, the following features are set: The circulating gas circuit includes a No. 4 connecting pipe 33, a No. 5 connecting pipe 34, a No. 3 one-way valve 35 and a No. 4 one-way valve 36. Each adsorption tank 10 is provided with an outlet 37 at the bottom, and each outlet 37 is provided with a No. 2 lifting pump 38 (such as Figure 8 As shown in the figure, the heater 13 is fixed on the support frame 1, the No. 4 connecting pipe 33 connects the heater 13 and one of the No. 2 lifting pumps 38, the No. 5 connecting pipe 34 connects the heater 13 and the other No. 2 lifting pump 38, the No. 3 one-way valve 35 is arranged on the No. 4 connecting pipe 33, the No. 4 one-way valve 36 is arranged on the No. 5 connecting pipe 34, the two exhaust pipes 14 are respectively connected to the No. 4 connecting pipe 33 and the No. 5 connecting pipe 34, and each exhaust pipe 14 is provided with an exhaust one-way valve 39.

[0026] After the natural gas in the adsorption tank 10 passes through the adsorption screen 11, the natural gas will enter the circulating gas path through the No. 2 lifting pump 38. During this process, the natural gas will be discharged to the heater 13 through the No. 4 connecting pipe 33. Part of the natural gas entering the No. 4 connecting pipe 33 will be discharged through the corresponding exhaust pipe 14, and the other part of the natural gas will enter another adsorption tank 10 through the No. 5 connecting pipe 34 after passing through the heater 13. When the natural gas enters the No. 5 connecting pipe 34 through the heater 13, the exhaust pipe 14 connected to the No. 5 connecting pipe 34 will be closed by the corresponding exhaust one-way valve 39. When the natural gas enters the No. 4 connecting pipe 33 through the heater 13, the exhaust pipe 14 connected to the No. 4 connecting pipe 14 will be closed by the corresponding exhaust one-way valve 39. When all the upstream natural gas is dried, the natural gas that needs to be dried stops circulating and is completely discharged. At this time, the No. 3 one-way valve 35 and the No. 4 one-way valve 36 will close the No. 4 connecting pipe 33 and the No. 5 connecting pipe 34 respectively, so the natural gas can only be completely discharged through the corresponding exhaust pipe 14.

[0027] In order to show the specific structure of the return gas path, the following features are set: Each return air circuit includes a No. 6 connecting pipe 40, a No. 3 lifting pump 41, a No. 5 one-way valve 42 and a No. 6 one-way valve 43. The two ends of the No. 6 connecting pipe 40 are respectively connected to the return pipe 12 and the intake pipe 4. The No. 3 lifting pump 41 is arranged on the No. 6 connecting pipe 40. The No. 5 one-way valve 42 is arranged at the connection between the No. 6 connecting pipe 40 and the return pipe 12. The No. 6 one-way valve 43 is arranged at the connection between the No. 6 connecting pipe 40 and the intake pipe 4.

[0028] When the natural gas enters the adsorption tank 10 for drying, the No. 5 one-way valve 42 closes the return pipe 12. At this time, the natural gas can only be discharged from the gas outlet 37. When the natural gas enters the adsorption tank 10 for regenerating the adsorption screen 11, the No. 5 one-way valve 42 opens the return pipe 12, and the No. 2 connecting pipe 28 and the No. 3 connecting pipe 29 are closed by the No. 1 one-way valve 30 and the No. 2 one-way valve 31 respectively. In this way, after the natural gas regenerates the adsorption screen 11 in the adsorption tank 10, the natural gas will carry liquid droplets and flow back into the intake pipe 4.

[0029] In order to show the specific structure of the cooling cycle mechanism, the following features are set: The cooling circulation mechanism includes a warm water tank 44, a cold water tank 45, a cooler 46, a No. 1 water pump 47, a No. 2 water pump 48 and a No. 3 water pump 49. The warm water tank 44, the cold water tank 45 and the cooler 46 are all fixed on the support frame 1. The water pipe 20 is connected to the warm water tank 44. The water outlet 6 is connected to the warm water tank 44 through the No. 7 connecting pipe 50. The warm water tank 44 is connected to the cooler 46 through the No. 1 water pump 47. The cooler 46 is connected to the cold water tank 45 through the No. 2 water pump 48. The cold water tank 45 is connected to the water inlet 7 through the No. 3 water pump 49.

[0030] The liquefied water discharged from the mist collecting pipe 15 will flow into the warm water tank 44, and the liquefied water stored in the warm water tank 44 will enter the cooler 46 through the No. 1 water pump 47. After being cooled by the cooler 46, the liquefied water will flow into the cold water tank 45 through the No. 2 water pump 48, and the condensed water stored in the cold water tank 45 will be introduced into the condensation tank 2 through the No. 3 water pump 49. Since the condensation tank 2 is filled with condensed water in advance, the condensed water introduced from the cold water tank 45 into the condensation tank 2 will press out the condensed water originally in the condensation tank 2, and the condensed water pressed out from the condensation tank 2 will flow into the warm water tank 44 through the No. 7 connecting pipe 50. In this way, when the condensed water dries the natural gas, the condensed water will self-circulate, thereby ensuring that the condensed water always has a low temperature that cools the water vapor.

[0031] In order to actively discharge the liquefied water in the mist catching tank 8, the following features are provided: A No. 7 one-way valve 51 is provided on the drainage pipe 9 , and a No. 4 water pump 52 is provided on the support frame 1 . The No. 4 water pump 52 connects the No. 7 one-way valve 51 and the warm water tank 44 .

[0032] Since the floating valve can only lower the water level in the mist catching tank 8 and cannot discharge all the liquefied water in the mist catching tank 8, when all the upstream natural gas has been dried, the fourth water pump 52 will pump out the liquefied water in the mist catching tank 8 and introduce it into the warm water tank 44 for temporary storage.

[0033] Working principle: The natural gas is dried three times through this device. The condensation component is used for the first drying of the natural gas, the mist collection component is used for the second drying of the natural gas, and the adsorption component is used for the third drying of the natural gas. After the three dryings, all the moisture in the natural gas will be removed. The specific drying process is as follows: The condensation tank 2 is filled with condensed water in advance, and the natural gas containing water is injected into the spiral tube 3 through the air inlet pipe 4. The natural gas will flow downward in the spiral tube 3. In the process of the natural gas flowing in the spiral tube 3, the condensed water stored in the condensation tank 2 will condense the water vapor in the natural gas. The water vapor will become liquefied water after condensation. The liquefied water will flow along the spiral tube 3 to the air outlet pipe 5 along the natural gas. Thereafter, the natural gas will drive the liquefied water into the fog catcher 8 through the air outlet pipe 5. After entering the fog catcher 8, the liquefied water will fall to the bottom of the fog catcher 8 due to gravity, and the natural gas will flow upward after entering the fog catcher 8. In the process of the natural gas flowing upward, the liquid droplets carried by the natural gas are removed by the fog capture mechanism. The natural gas after entering the control gas path, since the two adsorption tanks 10 have the same structure, in order to facilitate the distinction, the two adsorption tanks 10 are set to be A tank and B tank respectively. When the natural gas enters the control gas path, the control gas path will pass the natural gas into the A tank. The natural gas flowing into the A tank will pass through the adsorption screen 11, and the remaining water in the natural gas will be completely removed by the adsorption screen 11. After that, the natural gas will flow from the adsorption tank 10 into the circulation gas path. A part of the natural gas entering the circulation gas path will be discharged through the exhaust pipe 14. The natural gas discharged from the exhaust pipe 14 has been dried three times to remove all the water. The other part of the natural gas will enter the B tank after passing through the heater 13. The natural gas entering the B tank will pass through the adsorption screen 11 after passing through the The reflux pipe 12 and the reflux gas path flow back into the intake pipe 4. Thereafter, the natural gas discharged from tank B and the natural gas continuously introduced into the spiral tube 3 will converge in the intake pipe 4 and enter the mist catching tank 8 again after passing through the spiral tube 3. At this time, the natural gas discharged from the mist catching tank 8 will enter tank B through the control gas path, so that part of the natural gas discharged from tank B will be discharged through the exhaust pipe 14, and the other part of the natural gas will enter tank A through the heater 13. At this time, the natural gas entering tank A will dry the adsorption screen 11 in tank A, so as to achieve the regeneration of the adsorption screen 11. Thereafter, the natural gas in tank A will flow back into the intake pipe 4 through the reflux pipe 12 and the reflux gas path. In summary, after the natural gas has been dried three times, A portion of the dry natural gas will be discharged, while the other portion of the dry natural gas will circulate on the adsorption screens 11 in the two adsorption tanks 10, so that the moisture in the adsorption screen 11 is taken out by the dry and hot natural gas, and finally the adsorption screen 11 is regenerated, so that the natural gas drying process of the device is continuous and environmentally friendly. When the cooling water in the condensation tank 2 condenses the natural gas in the spiral tube 3, the condensed water in the condensation tank 2 is circulated through the cooling circulation mechanism, that is, the condensed water will be discharged into the condensation tank 2 from the bottom through the cooling circulation mechanism, and the condensed water in the condensation tank 2 will be discharged from the condensation tube into the cooling circulation mechanism, so that the condensation effect of the natural gas in the spiral tube 3 is ensured by the circulation of the condensed water.

[0034] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A natural gas drying device, characterized in that: The invention comprises a support frame (1), a condensation component, a fog collecting component and two groups of adsorption components. The condensation component comprises a condensation tank (2) and a spiral tube (3). The condensation tank (2) is vertically fixed on the support frame (1). The spiral tube (3) is vertically wound inside the condensation tank (2). The upper and lower ends of the spiral tube (3) are respectively connected to an air inlet pipe (4) and an air outlet pipe (5) passing through the outside of the condensation tank (2). The outer wall of the condensation tank (2) is provided with a water outlet (6) and a water inlet (7) distributed vertically. The fog collecting component comprises a fog collecting tank (8) and a fog collecting mechanism. The fog collecting tank (8) is vertically fixed on the side of the condensation tank (2). The lower end of the fog collecting tank (8) is provided with a drainage pipe (9). The fog collecting mechanism is arranged inside the fog collecting tank (8). The two groups of adsorption components are symmetrical about the fog collecting tank (8). Each group of adsorption components comprises a vertical adsorption tank (8). A tank (10) and an adsorption screen (11) arranged in the adsorption tank (10); a return pipe (12) located above the adsorption screen (11) is arranged on the outer wall of the adsorption tank (10); a control air path connecting the fog catcher (8) and the two adsorption tanks (10) is arranged above the fog catcher (8); a circulation air path connecting the two adsorption tanks (10) is arranged below the fog catcher (8); a heater (13) is arranged on the circulation air path, and exhaust pipes (14) located on both sides of the heater (13) are connected to the circulation air path; a return air path for connecting the return pipe (12) and the air inlet pipe (4) is arranged between each adsorption tank (10) and the condensation tank (2); a cooling circulation mechanism is arranged on the support frame (1); water discharged from the condensation tank (2) and the fog catcher (8) is discharged back into the condensation tank (2) through the cooling circulation mechanism.

2. The natural gas drying device according to claim 1, characterized in that: The fog collecting mechanism comprises a fog collecting pipe (15) and a plurality of hollow conical disks (16), wherein the fog collecting pipe (15) is vertically fixed on the top of the fog collecting tank (8), the upper end of the fog collecting pipe (15) is extended outside the fog collecting tank (8), the lower end of the fog collecting pipe (15) is inserted into the fog collecting tank (8), a filter screen (17) is fixedly arranged inside the lower end of the fog collecting pipe (15), a plurality of hollow conical disks (16) are evenly distributed below the fog collecting pipe (15) along the vertical direction, each hollow conical disk (16) is fixedly connected to the inner wall of the fog collecting tank (8), and the conical end of each hollow conical disk (16) faces downward, and a ventilation pipe (18) is formed on the outer wall of the fog collecting tank (8), and the ventilation pipe (18) is connected to the air outlet pipe (5) through a No. 1 connecting pipe (19).

3. The natural gas drying device according to claim 1, characterized in that: A vertical water pipe (20) is formed at the bottom of the fog catching tank (8). The upper end of the water pipe (20) extends into the fog catching tank (8), and the lower end of the water pipe (20) is extended out of the fog catching tank (8). A plurality of water grooves (21) are provided on the outer wall of the upper end of the water pipe (20). A floating valve is provided in the upper end of the water pipe (20). The floating valve includes a valve pin (22), a slide rod (23) and a conical floating disc (24). The valve pin (22) slides coaxially on the upper end of the water pipe (20). A plurality of water channels (21) are blocked by a valve pin (22) at the end, a retaining ring (25) is formed on the inner wall of the water channel (20) to limit the downward movement of the valve pin (22), a sealing cover (26) is fixedly provided on the top of the water channel (20), a slide rod (23) is coaxially formed on the top of the valve pin (22), the slide rod (23) coaxially passes through the sealing cover (26) upward, and a conical floating plate (24) is coaxially formed on the top of the slide rod (23), and the conical end of the conical floating plate (24) faces upward.

4. The natural gas drying device according to claim 2, characterized in that: The control gas circuit comprises a No. 1 lifting pump (27), a No. 2 connecting pipe (28), a No. 3 connecting pipe (29), a No. 1 non-return valve (30) and a No. 2 non-return valve (31). The top of each adsorption tank (10) is provided with an air inlet (32). The No. 1 lifting pump (27) is arranged at the upper end of the mist collecting pipe (15). The No. 2 connecting pipe (28) connects the air inlet (32) of one adsorption tank (10) with the No. 1 lifting pump (27). The No. 3 connecting pipe (29) connects the air inlet (32) of another adsorption tank (10) with the No. 1 lifting pump (27). The No. 1 non-return valve (30) is arranged on the No. 2 connecting pipe (28), and the No. 2 non-return valve (31) is arranged on the No. 3 connecting pipe (29).

5. The natural gas drying device according to claim 4, characterized in that: The circulating gas circuit comprises a No. 4 connecting pipe (33), a No. 5 connecting pipe (34), a No. 3 non-return valve (35) and a No. 4 non-return valve (36). Each adsorption tank (10) is provided with an air outlet (37) at the bottom, and each air outlet (37) is provided with a No. 2 lifting pump (38). The heater (13) is fixed on the support frame (1). The No. 4 connecting pipe (33) connects the heater (13) and one of the No. 2 lifting pumps (38). The No. 5 connecting pipe (34) connects the heater (13) and another No. 2 lifting pump (38). The No. 3 non-return valve (35) is provided on the No. 4 connecting pipe (33), and the No. 4 non-return valve (36) is provided on the No. 5 connecting pipe (34). Two exhaust pipes (14) are respectively connected to the No. 4 connecting pipe (33) and the No. 5 connecting pipe (34), and each exhaust pipe (14) is provided with an exhaust non-return valve (39).

6. The natural gas drying device according to claim 5, characterized in that: Each return gas path comprises a No. 6 connecting pipe (40), a No. 3 lifting pump (41), a No. 5 check valve (42) and a No. 6 check valve (43); both ends of the No. 6 connecting pipe (40) are respectively connected to the return pipe (12) and the intake pipe (4); the No. 3 lifting pump (41) is arranged on the No. 6 connecting pipe (40); the No. 5 check valve (42) is arranged at the connection between the No. 6 connecting pipe (40) and the return pipe (12); and the No. 6 check valve (43) is arranged at the connection between the No. 6 connecting pipe (40) and the intake pipe (4).

7. The natural gas drying device according to claim 3, characterized in that: The cooling circulation mechanism comprises a warm water tank (44), a cold water tank (45), a cooler (46), a first water pump (47), a second water pump (48) and a third water pump (49). The warm water tank (44), the cold water tank (45) and the cooler (46) are all fixed on the support frame (1). The water pipe (20) is connected to the warm water tank (44). The water outlet (6) is connected to the warm water tank (44) through a seventh connecting pipe (50). The warm water tank (44) is connected to the cooler (46) through the first water pump (47). The cooler (46) is connected to the cold water tank (45) through the second water pump (48). The cold water tank (45) is connected to the water inlet (7) through the third water pump (49).

8. The natural gas drying device according to claim 7, characterized in that: A No. 7 check valve (51) is provided on the drainage pipe (9), a No. 4 water pump (52) is provided on the support frame (1), and the No. 4 water pump (52) connects the No. 7 check valve (51) and the warm water tank (44).

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