Composite flow channel plate column for deep dehydration of natural gas

Abstract

The present application relates to natural gas dehydration technical field, specifically to a kind of composite flow channel plate column for natural gas deep dehydration, including tower body, the lower part of tower body is connected with wet gas import, the top of tower body is connected with dry gas outlet and dehydration liquid import, and the bottom of tower body is connected with waste liquid outlet;Tower body is provided with fine dehydration structure, plate dehydration structure, condensing structure and cyclone dehydration structure from top to bottom in it;Fine dehydration structure is located between dry gas outlet and dehydration liquid import, and supply temperature structure is arranged at fine dehydration structure;Cyclone dehydration structure is set as cyclone cylinder, and water vapor condensation beads are separated by mist dehydration liquid centrifugation;Condensing structure includes condensing pipe, carries out condensation dehydration, and plate dehydration structure includes hole plate obliquely arranged in tower body, increases the contact area of natural gas and dehydration liquid;Fine dehydration structure utilizes adjacent hydrophilic plate to form tower body space, for absorbing smaller water molecule.The present application solves the problem that deep dehydration cannot be realized while reducing regeneration energy consumption in natural gas dehydration.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of natural gas dehydration, in particular to a composite flow channel plate tower for deep dehydration of natural gas. BACKGROUND

[0002] When natural gas is mined from the underground, it usually carries various impurities and underground water, so that the natural gas usually contains moisture during transportation. The moisture will form hydrate with part of the impurities during continuous transportation, thereby blocking the pipeline and equipment, and the carrying of the moisture will also reduce the purity of the natural gas and reduce its use effect. Therefore, natural gas dehydration is a key link in the natural gas treatment process.

[0003] At present, the commonly used natural gas dehydration methods in the natural gas treatment process mainly include triethylene glycol (TEG) absorption method and molecular sieve adsorption method. The triethylene glycol absorption method uses a hydrophilic solvent (i.e. dehydration liquid) to continuously contact the natural gas to absorb the mixed moisture therein, and the cost is low, but because of the limitation of the dehydration liquid adsorption effect, the dehydration depth is limited, and it is difficult to achieve deep dehydration; and the molecular sieve adsorption method uses a porous solid material (molecular sieve) to adsorb water molecules, and the dehydration degree is high and the regeneration capacity is strong, but the regeneration needs high temperature action, and the overall regeneration energy consumption is large, and the cost is high. SUMMARY

[0004] The purpose of the present application is to provide a composite flow channel plate tower for deep dehydration of natural gas, which solves the problem that deep dehydration cannot be achieved while reducing the regeneration energy consumption in natural gas dehydration.

[0005] In order to solve the above technical problems, the scheme adopted by the present application is as follows:

[0006] A composite flow channel plate tower for deep dehydration of natural gas, comprising a tower body, a wet gas inlet is communicated at the lower part of the tower body, a dry gas outlet and a dehydration liquid inlet are respectively communicated at the top of the tower body, and a waste liquid outlet is communicated at the bottom of the tower body.

[0007] Preferably, a fine dehydration structure, a plate dehydration structure, a condensation structure and a cyclone dehydration structure are arranged in the tower body from top to bottom.

[0008] Preferably, the fine dehydration structure is located between the dry gas outlet and the dehydration liquid inlet, and a temperature supply structure is arranged at the fine dehydration structure.

[0009] Preferably, the cyclone dehydration structure is provided as a cyclone barrel, a valve pipe is arranged to communicate at the upper part of the cyclone barrel, and the valve pipe is arranged to be tangent to the inner wall of the barrel-shaped structure.

[0010] Preferably, the condensation structure comprises a condensation pipe, and the diameter of the condensation pipe is smaller than the barrel diameter of the cyclone barrel.

[0011] Preferably, the plate dehydration structure comprises a hole plate obliquely arranged in the tower body, and the hole plate is provided with a plurality of through holes.

[0012] Preferably, the fine dehydration structure comprises, from top to bottom, a hydrophobic plate, a hydrophilic plate, a hydrophilic plate, and a hydrophobic plate, the adjacent hydrophobic plates and the adjacent hydrophilic plates are attached, the tower space is arranged between the adjacent hydrophilic plates, and the water vapor outlet and the humidity sensor are arranged in the tower space.

[0013] Preferably, the upper part of the cyclone cylinder is a circular barrel structure, the lower part of the cyclone cylinder is a conical barrel structure, and the conical tip is located at the bottom.

[0014] Preferably, a plurality of atomization structures are fixedly arranged on the wall surface of the conical barrel structure of the lower part of the cyclone cylinder.

[0015] Preferably, the atomization structure is arranged in the form of a long strip-shaped plate, and a plurality of long grooves are arranged through the plate surface of the long strip-shaped plate.

[0016] Preferably, the lower end of the condensing pipe is communicated with the top end of the cyclone cylinder, and the upper end of the condensing pipe is communicated with the internal space of the upper part of the tower body.

[0017] Preferably, a plurality of condensing sub-pipes are fixedly communicated in the condensing pipe, and the pipe diameter of the condensing sub-pipe is smaller than the pipe diameter of the condensing pipe.

[0018] Preferably, filter plates are fixedly arranged in the tower body at the upper and lower ends of the condensing pipe, respectively, and the plate surface area of the filter plate corresponds to the internal cross-sectional area of the tower body.

[0019] Preferably, a plurality of leakage holes are arranged through the filter plate.

[0020] Preferably, the pipe wall of the condensing pipe and the condensing sub-pipe is arranged in the form of a hydrophobic wall surface.

[0021] Preferably, the top part of the cyclone cylinder is arranged in the form of a conical top cavity, and the conical tip of the conical top cavity is close to the lower end of the condensing pipe.

[0022] Preferably, the plate dehydration structure further comprises a flow guide plate.

[0023] Preferably, the flow guide plate is obliquely fixed on the inner wall of the tower body, the oblique bottom end of the flow guide plate is fixedly connected to one end of the hole plate, the other end of the hole plate is in contact with the plate surface of the slow flow plate, and the slow flow plate is fixed on the inner wall of the tower body.

[0024] Preferably, the inclination of the plate surface of the hole plate relative to the tower body is greater than the inclination of the plate surface of the flow guide plate relative to the tower body.

[0025] Preferably, the plate surface of the slow flow plate is arranged as a horizontal plate surface or an inclined plate surface with a relative inclination smaller than that of the guide plate.

[0026] Preferably, at least two layers of plate-type dehydration structures are arranged in the tower body from top to bottom.

[0027] Preferably, the guide plate of the plate-type dehydration structure at the top layer is located below the dehydration liquid inlet.

[0028] Preferably, the end of the plate surface of the slow flow plate of each layer of plate-type dehydration structure is fixedly connected to the inclined top end of the guide plate of the next layer of plate-type dehydration structure.

[0029] Preferably, a plurality of micropores are formed in the plate surface of each of the hydrophobic plate and the hydrophilic plate.

[0030] Preferably, a humidity sensor is arranged in the space of the tower body, and the humidity sensor is electrically connected to the control end of the pump pressure valve of the water vapor outlet and the control end of the pump pressure valve of the moisture inlet, respectively.

[0031] Preferably, the tower body is further connected to the water vapor outlet.

[0032] Preferably, the temperature supply structure comprises a gas cavity.

[0033] Preferably, each of the hydrophobic plates is arranged as a hollow gas cavity, one side of the gas cavity is connected to one end of the air inlet pipe, the other side of the gas cavity is connected to one end of the air outlet pipe, the other ends of the air inlet pipe and the air outlet pipe are connected to the pump gas outlet and the pump gas inlet of the temperature raising assembly, respectively, and the gas cavity is filled with inert gas.

[0034] Preferably, the air inlet pipe penetrates through the bottom of the cyclone cylinder.

[0035] The technical scheme of the present application has at least the following advantages and beneficial effects:

[0036] In order to solve the problem that it is difficult to deeply dehydrate natural gas by using the dehydration liquid absorption method in the prior art, the natural gas is subjected to rough dehydration from top to bottom by sequentially arranging plate-type dehydration structures, condensation structures and cyclone dehydration structures, the larger water vapor condensate in the natural gas is separated by the cyclone centrifugal separation of the cyclone dehydration structure, and then the smaller water vapor condensate in the natural gas is adsorbed by the atomized dehydration liquid which is broken by the cyclone; the water vapor condensate which is not separated in time due to too high flow rate is condensed by the natural gas which is cooled by the Venturi effect of the condensation structure; then the plate-type dehydration structure is used to make sufficient dehydration liquid contact with the natural gas, so as to further adsorb the atomized dehydration liquid and the water vapor condensate in the natural gas, and the rough dehydration process is realized.

[0037] In order to solve the problem that it is difficult to deeply dehydrate natural gas by using the dehydration liquid absorption method in the prior art, the fine dehydration structure and the temperature supply structure are arranged above the plate type dehydration structure to perform fine dehydration on the crude dehydrated natural gas, the hydrophobic plate, the hydrophilic plate, the tower body space, the hydrophilic plate and the hydrophobic plate are arranged, so that when the natural gas enters the hydrophilic plate and the tower body space, the water vapor molecules which are more difficult to separate are quickly adsorbed on the hydrophilic plate to be gathered, the tower body space temporarily retains the natural gas, so that more hydrophilic plate surfaces are contacted when the natural gas flows, the water molecule adsorption effect is improved, then the dry natural gas is discharged, the hydrophobic plate located at the outermost layer can reduce the gathering of water molecules on the plate surface, isolate the water molecules adsorbed by the hydrophilic plate, reduce the situation that the water molecules continue to be discharged with the dry natural gas, and deep dehydration of the natural gas is realized. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is a sectional view structure schematic diagram of the application.

[0039] Figure 2 It is a sectional view structure schematic diagram of the cyclone dehydration structure in the application.

[0040] Figure 3 It is a sectional view structure schematic diagram of the condensation structure in the application.

[0041] Figure 4 It is a sectional view structure schematic diagram of the plate type dehydration structure in the application.

[0042] Figure 5 It is an enlarged structure schematic diagram of A in the application. Figure 1

[0043] Figure 6 It is an enlarged structure schematic diagram of B in the application. Figure 1

[0044] In the drawing: 1-tower body, 11-wet gas inlet, 12-dry gas outlet, 13-waste liquid outlet, 14-dehydration liquid inlet, 2-cyclone dehydration structure, 3-condensation structure, 301-conical top cavity, 302-condensation pipe, 303-condensation auxiliary pipe, 304-filter plate, 4-plate type dehydration structure, 401-guide plate, 402-hole plate, 403-flow slowing plate, 5-fine dehydration structure, 501-hydrophobic plate, 502-hydrophilic plate, 503-micropore, 504-water vapor outlet, 505-humidity sensor, 6-temperature supply structure, 601-gas cavity, 602-gas outlet pipe, 603-warming assembly, 604-gas inlet pipe, 7-atomization structure. DETAILED DESCRIPTION

[0045] ​​Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0046] It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings. If the terms "center", "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore, cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, cannot be understood as limiting the present application. It should also be noted that, unless otherwise explicitly specified and limited, if the terms "arrange", "mount", "connect" appear, they should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] Embodiments

[0048] Please refer to Figures 1-6 The present application provides a composite flow channel plate tower for deep dehydration of natural gas, comprising a whole tower body 1, wherein the lower part of the tower body 1 is communicated with a wet gas inlet 11 for pumping natural gas with water vapor into the tower body 1 for dehydration, the top of the tower body 1 is respectively communicated with a dry gas outlet 12 and a dehydration liquid inlet 14, the dehydration liquid inlet 14 pumps dehydration liquid into the upper part of the tower body 1, and the dehydration liquid successively flows through the plate dehydration structure 4, the condensation structure 3 and the cyclone dehydration structure 2 arranged from top to bottom in the tower body 1, to perform rough dehydration of natural gas, and then the dehydration liquid carrying mixed water vapor flows out of the tower body 1 from the waste liquid outlet 13 communicated with the bottom of the tower body 1.

[0049] And the fine dehydration structure 5 is arranged in the tower body 1, the fine dehydration structure 5 is located between the dry gas outlet 12 and the dehydration liquid inlet 14, for deep dehydration of the rising natural gas after rough dehydration, and then the dry natural gas after dehydration is discharged from the dry gas outlet 12, and the temperature supply structure 6 is arranged at the fine dehydration structure 5, so that the fine dehydration structure 5 can be regenerated by heating after adsorbing too much water vapor, to maintain the deep dehydration effect.

[0050] Specifically, please refer to Figure 2 In this embodiment, the cyclone dehydration structure 2 is provided as a cyclone cylinder, the upper part of the cyclone cylinder is a circular barrel structure, the lower part of the cyclone cylinder is a conical barrel structure, the conical tip is located at the bottom, and the valve pipe at the moisture inlet 11 is connected to the upper part of the cyclone cylinder, and the direction of the valve pipe is tangent to the inner wall of the circular barrel structure.

[0051] When the natural gas with water vapor is pumped into the cyclone cylinder from the moisture inlet 11, a tangential jet will be formed in the barrel, causing the natural gas to rotate at high speed in the barrel, generating a centrifugal effect. Because of the weight difference between the gas and the water vapor, the larger water vapor condensate entrained in the natural gas will be thrown onto the inner wall of the cyclone cylinder under the centrifugal effect, and the natural gas will rotate around the axis of the cyclone cylinder, achieving separation of the two. In this process, the dehydration liquid at the upper part of the tower body 1 will also flow into the cyclone cylinder, and in the process of falling, it will contact the rotating natural gas, and the dehydration liquid will be dispersed into a mist, bringing out more light water vapor, and being thrown onto the inner wall of the cyclone cylinder by centrifugal force.

[0052] The bottom of the cyclone cylinder is connected to the valve pipe of the waste liquid outlet 13, and the dehydration liquid and water vapor condensate thrown onto the barrel wall will be guided into the waste liquid outlet 13 through the conical barrel structure at the lower part of the cyclone cylinder and discharged.

[0053] Further, although the dehydration liquid falls and is passively dispersed by the rotating gas flow at the top of the cyclone cylinder, in actual use, because the natural gas itself has a large flow rate due to pump pressure, the rotating upward gas flow formed by it will disperse the dehydration liquid before it falls to the lower part of the cyclone cylinder, making it easy for the mist of dehydration liquid to gather at the upper part of the cyclone cylinder and difficult to contact the gas flow at the lower part of the cyclone cylinder, affecting the dehydration effect.

[0054] To solve the above problems, in this embodiment, a plurality of atomizing structures 7 are fixedly arranged on the wall surface of the conical barrel structure at the lower part of the cyclone cylinder, which disperses the dehydration liquid that has been gathered by centrifugal force and flows into the lower part of the cyclone cylinder again, forming atomized dehydration liquid.

[0055] Specifically, the atomizing structure 7 is provided as a long strip-shaped plate, which increases the contact area between the dehydration liquid rotating on the wall of the cyclone cylinder and the plate surface by using the long strip structure of the long strip-shaped plate, so that the dehydration liquid collides with the plate surface and is impacted to the center of the cyclone cylinder, is dispersed by the rotating gas flow, and forms a mist of dehydration liquid at the lower part of the cyclone cylinder. The width of the long strip-shaped plate is relatively narrow, and when a sufficient amount of dehydration liquid is rotating on the barrel wall, a part of the dehydration liquid can directly flow over the long strip-shaped plate, so that most of the dehydration liquid can still flow quickly into the waste liquid outlet 13 at the bottom end of the cyclone cylinder, and the effect of the long strip-shaped plate on disturbing the flow will not excessively reduce the solid-liquid separation effect of the cyclone.

[0056] It is worth mentioning that a plurality of long grooves are formed through the plate surface of the long strip-shaped plate, so that the flowability of the dewatering liquid is increased while the plate surface maintains the impact effect of the dewatering liquid, and the solid-liquid separation effect is maintained.

[0057] Further, although the mixed water vapor condensate beads with large particle diameters in the natural gas can be removed by the dispersed mist dewatering liquid and the cyclone effect to perform preliminary dewatering, in actual work, because the flow rate of the upward natural gas flow is large (so as to maintain the cyclone effect of the flow), in the dewatering process, part of the water vapor condensate beads with small particle diameters and the mist dewatering liquid are quickly taken away from the cyclone cylinder by the upward flow before being centrifugally separated from the flow, which leads to an unsatisfactory preliminary dewatering effect.

[0058] In order to solve the problem of unsatisfactory separation of part of the water vapor condensate beads with small particle diameters, please refer to Figure 3 and Figure 5 In the embodiment, a condensing structure 3 is arranged above the cyclone dewatering structure 2, the condensing structure 3 comprises a condensing pipe 302, the lower end of the condensing pipe 302 is communicated with the top end of the cyclone cylinder, and the upper end of the condensing pipe 302 is communicated with the internal space of the upper part of the tower body 1. The condensing structure 3 is used for quickly condensing part of the water vapor condensate beads with small particle diameters mixed in the natural gas when the flow is upward, increasing the diameter and weight, so as to separate from the flow.

[0059] Specifically, the pipe diameter of the condensing pipe 302 is smaller than the cylinder diameter of the cyclone cylinder, when the natural gas passes through the condensing pipe 302, due to the Venturi effect, the flow rate of the flow increases when the flow flows from a large pipe diameter into a small pipe diameter, and the temperature of the condensing pipe 302 with a small pipe diameter begins to decrease. In the temperature decreasing process, the water vapor condensate beads with small particle diameters mixed in the flow begin to condense and form beads, and the weight and diameter begin to gradually increase until the water vapor condensate beads are separated from the natural gas.

[0060] In actual work, the temperature decreasing and condensing effect of a single condensing pipe 302 is not very good, if the condensing and condensing bead separation effect of the water vapor condensate beads is to be achieved, a condensing pipe 302 with a relatively long pipe length must be arranged, but the height of the entire tower body 1 is limited, and it is difficult to arrange a relatively long condensing pipe 302, therefore, in the embodiment, a plurality of condensing auxiliary pipes 303 are fixedly communicated in the condensing pipe 302, the pipe diameter of the condensing auxiliary pipes 303 is smaller than the pipe diameter of the condensing pipe 302, when the flow passes through the plurality of condensing auxiliary pipes 303, because of the pipe wall of the plurality of condensing auxiliary pipes 303, the contact area of the natural gas flow is increased, and the condensing effect is improved, so that the condensing effect is maintained while the length of the entire condensing pipe 302 is reduced.

[0061] It is worth mentioning that because the natural gas flow rate from the upper end of the condensing pipe 302 is fast, it is easy to blow away the falling dewatering liquid directly above the tower body 1, affecting the dewatering effect of the upper plate dewatering structure 4, so a filter plate 304 is fixedly arranged in the tower body 1 at the upper end of the condensing pipe 302. The filter plate 304 intercepts the entire inside of the tower body 1, and a plurality of leakage holes are formed through the filter plate 304 to allow gas and liquid to pass through. When the high-speed airflow blows to the filter plate 304 above, the airflow is blocked by the plate surface, thereby realizing the speed reduction of the airflow passing through.

[0062] It is worth mentioning that because the dewatering liquid flowing downward from the upper part of the tower body 1 will enter the cyclone pipe after passing through the condensing pipe 302, in order to ensure the dewatering effect of the natural gas, the flow rate of the dewatering liquid is generally large. When the dewatering liquid with large flow rate directly falls on the rotating airflow in the cyclone cylinder, on the one hand, the dewatering liquid may be difficult to distribute in the entire cyclone cylinder for dispersion (the cyclone cylinder diameter is smaller than the condensing pipe 302 diameter), and on the other hand, the dewatering liquid may be too heavy at a single position, so that the rotating airflow cannot be dispersed and is blocked in the rotating path by the dewatering liquid, affecting the effect of the airflow rotating upward. In order to solve this problem, a filter plate 304 is also fixedly arranged at the top end of the cyclone cylinder. When the dewatering liquid passing through the condensing pipe 302 enters the cyclone cylinder, it will first fall on the filter plate 304 and then fall into the lower part of the cyclone cylinder through the filter holes of the filter plate 304, thereby reducing the liquid bead diameter of the dewatering liquid and facilitating the rapid dispersion of the rotating airflow into mist.

[0063] It is worth mentioning that the pipe walls of the condensing pipe 302 and the condensing auxiliary pipe 303 are all arranged as hydrophobic surfaces. When water vapor droplets condense on the pipe wall, they will gradually flow downward into the lower cyclone cylinder due to the hydrophobic surface and their own weight. The top part of the cyclone cylinder is arranged as a conical top cavity 301, and the conical tip of the conical top cavity 301 is close to the condensing pipe 302. When water vapor condensate beads flow into the cyclone cylinder from the condensing pipe 302, they can be guided to the cyclone position of the cyclone cylinder by the conical top cavity 301 and discharged with the cyclone liquid, without gathering at the top of the cyclone cylinder, thereby reducing the occurrence of the situation that the condensate beads are blown into the condensing pipe 302 again by the airflow.

[0064] Further, in order to solve the problem that part of the mist-shaped dewatering liquid rises with the airflow (the leakage holes of the filter plate 304 in the condensing structure 3 are not completely covered by the falling dewatering liquid, so the filter plate 304 cannot completely remove the mist-shaped dewatering liquid in the airflow), and further dewater the natural gas, please refer to Figure 4 A plate dewatering structure 4 is further arranged in the tower body 1 above the condensing structure 3.

[0065] The plate dewatering structure 4 includes a flow guide plate 401, a hole plate 402, and a buffer plate 403.

[0066] Specifically, the flow guide plate 401 is fixedly inclined on the inner wall of the tower body 1, and the inclined bottom end is fixedly connected with one end of the hole plate 402, and the other end of the hole plate 402 contacts the plate surface of the slow flow plate 403. Among them, the inclination of the hole plate 402 in the tower body 1 is greater than the inclination of the flow guide plate 401 in the tower body 1. When the dewatering liquid flows onto the flow guide plate 401, it will be guided to the hole plate 402 at the bottom end. The hole plate 402 is provided with a plurality of through holes. By using the large-angle inclined plate surface of the hole plate 402, the dewatering liquid flowing through the entire plate surface of the hole plate 402 is accelerated, so as to avoid the situation that the flow rate is too low to cause all the dewatering liquid to flow out from part of the through holes of the hole plate 402. When the dewatering liquid flows to the inclined bottom end of the hole plate 402, it will flow into the plate surface of the slow flow plate 403. The plate surface of the slow flow plate 403 is provided as a horizontal plate surface or an inclined plate surface with an inclination angle smaller than that of the flow guide plate 401, so that the dewatering liquid flowing into the plate surface is slowed down and accumulated.

[0067] Preferably, since the flow guide plate 401 and the slow flow plate 403 are both closed plate surfaces, when the natural gas rises, it can only pass through the plurality of through holes of the hole plate 402 to rise. When the hole plate 402 with a larger inclination angle is covered with a layer of dewatering liquid, the natural gas passing through the hole plate 402 can fully contact the dewatering liquid to separate the misty dewatering liquid and a small amount of water vapor condensate from the natural gas, thereby maintaining the coarse dewatering effect on the natural gas. The dewatering liquid temporarily accumulated on the slow flow plate 403 can provide sufficient dewatering liquid for the hole plate 402, so that the natural gas continuously contacts sufficient dewatering liquid when passing through the hole plate 402, thereby separating the water vapor (wherein the hole makes the gas flow space smaller, and the natural gas passing rate is slower, and part of the natural gas will be temporarily retained at the position of the hole plate 402).

[0068] In order to ensure the dewatering and dehydrating effect of the plate type dewatering structure 4 on the natural gas, at least two layers of plate type dewatering structures 4 are continuously arranged in the tower body 1 from top to bottom. The dewatering and dehydration of the natural gas is carried out at the hole plate 402 and the slow flow plate 403 of each layer of plate type dewatering structure 4. The flow guide plate 401 of the plate type dewatering structure 4 located at the topmost layer is located below the dewatering liquid inlet 14, so that the dewatering liquid entering the tower body 1 directly falls into the plate type dewatering structure 4. The end of the plate surface of the slow flow plate 403 of each layer of plate type dewatering structure 4 is fixedly connected with the inclined top end of the flow guide plate 401 of the next layer of plate type dewatering structure 4, so that each layer of plate type dewatering structure 4 is seamlessly connected together, thereby maintaining the continuous contact between the natural gas and the dewatering liquid.

[0069] Further, although the coarse dewatering of the natural gas can be achieved by the cyclone dewatering structure 2, the condensing structure 3 and the plate type dewatering structure 4, and the water vapor condensate with a larger diameter can be removed from the natural gas, it is still difficult to remove the micron-level water molecules from the natural gas. Therefore, the natural gas after coarse dewatering needs to be further subjected to deep dewatering treatment.

[0070] To solve the above problems, please refer to Figure 4 And Figure 6 In this embodiment, the plate dehydration structure 4 is also provided with a fine dehydration structure 5 above it, which includes a hydrophobic plate 501, a hydrophilic plate 502, a micro-hole 503, a water vapor outlet 504, and a humidity sensor 505.

[0071] Specifically, a hydrophobic plate 501, a hydrophilic plate 502, a hydrophilic plate 502, and a hydrophobic plate 501 are fixed and installed in the tower body 1 from top to bottom, respectively. Among them, the adjacent hydrophobic plate 501 and the hydrophilic plate 502 are fixed together to form a combined hydrophobic layer and a hydrophilic layer, and then there is a gap between the adjacent hydrophilic plates 502. The tower body space is used to accommodate gas in the tower body space between the two hydrophilic plates 502, and a plurality of micro-holes 503 are formed on the surface of each hydrophobic plate 501 and hydrophilic plate 502. The pore size of the micro-hole 503 is generally less than 10 microns, which can pass through the natural gas and water vapor molecules.

[0072] Preferably, the hydrophobic plate 501 is made of a hydrophobic material, which can isolate water molecules from being adsorbed on the plate, and the hydrophilic plate 502 is made of a hydrophilic material, which can accelerate the adsorption of water molecules on the plate. When the natural gas rises from the lower part of the tower body 1, it will pass through the micro-holes 503 on the surface of the hydrophobic plate 501, the hydrophilic plate 502, the tower body space, the hydrophilic plate 502, and the hydrophobic plate 501 in turn. When the natural gas enters the hydrophilic plate 502 and the tower body space, it will contact the surface of the hydrophilic plate 502 and be quickly adsorbed onto the hydrophilic plate 502 for aggregation. The tower body space can make the natural gas stay, so that more contact with the surface of the hydrophilic plate 502 when the natural gas flows, improving the water molecule adsorption effect. Then, from the top hydrophobic plate 501, the dry natural gas after fine dehydration is pumped out from the dry gas outlet 12 at the top of the tower body 1. The outermost hydrophobic plate 501 can reduce the aggregation of water molecules on its surface and isolate the water molecules adsorbed by the hydrophilic plate 502, limiting them to the hydrophilic plate 502.

[0073] And in the tower body 1 is also fixed with humidity sensor 505, humidity sensor 505 sensing end is located in the tower body space, for detecting the concentration of water molecules (i.e. humidity) in the tower body space, the tower body space is also communicated with water vapor outlet 504, humidity sensor 505 is electrically connected with the pump pressure valve of water vapor outlet 504 and the pump pressure valve of humidity inlet 11 respectively, when the humidity sensor 505 senses the humidity does not exceed the set threshold, the pump pressure valve of water vapor outlet 504 is closed, the pump pressure valve of humidity inlet 11 is opened, the natural gas is pumped into the inside of tower body 1; When the humidity sensor 505 senses the humidity exceeds the set threshold, the pump pressure valve of water vapor outlet 504 is opened, the pump pressure valve of humidity inlet 11 is closed, the natural gas is stopped pumping into the inside of tower body 1, and the water vapor outlet 504 pumps out the water vapor in the tower body space, maintains the dryness of the two layers of hydrophilic plate 502, so that the hydrophilic adsorption function of hydrophilic plate 502 is regenerated.

[0074] But in actual use, because most of the water vapor molecules are adsorbed in the hydrophilic plate 502, it is difficult to pump out directly from the water vapor outlet 504, and it is difficult to regenerate the hydrophilic plate 502, in order to solve the above problems, the embodiment also provides a temperature supply structure 6 at the fine dehydration structure 5, for heating treatment of the hydrophilic plate 502, so that the water molecules adsorbed in the hydrophilic plate 502 are evaporated to the inside of the tower body space by heating, and are conveniently pumped out, so as to maintain the dry effect of the hydrophilic plate 502.

[0075] Among them, the temperature supply structure 6 includes air cavity 601, gas outlet pipe 602, temperature rising assembly 603, gas inlet pipe 604.

[0076] Specifically, each hydrophobic plate 501 is provided with a hollow air cavity 601, one side of the air cavity 601 is communicated with one end of the gas outlet pipe 602, the other side of the air cavity 601 is communicated with one end of the gas inlet pipe 604, and the other end of the gas inlet pipe 604 and the gas outlet pipe 602 is respectively communicated with the pump gas inlet and pump gas outlet of the temperature rising assembly 603, and the whole air cavity 601 is filled with inert gas, the temperature rising assembly 603 is provided as a gas heater, the inert gas is heated by the gas heater and then introduced into the air cavity 601 of the hydrophobic plate 501 through the gas outlet pipe 602, so that the temperature of the whole hydrophobic plate 501 is increased, the adjacent hydrophilic plate 502 of the hydrophobic plate 501 is heated and evaporated.

[0077] It is worth mentioning that, please refer to Figure 2When the inert gas inside the part of the air inlet pipe 604 needs to be heated, it is discharged from the hydrophobic plate 501 first, then flows through the cyclone cylinder, contacts with the high-temperature dewatering mixture in the cylinder, is preheated, enters the heating assembly 603 again, and is finally discharged into the air outlet pipe 602. This makes the heating structure 6 utilize part of the residual heat in the cyclone dewatering structure 2 for heat recovery, reduces the heating power of the heating assembly 603, and saves power supply.

[0078] Preferably, the heating structure 6 is directly installed on the tower body 1, small gas space and small volume heating plate are used to improve heat utilization rate, and no additional heat exchanger or other equipment needs to be additionally arranged outside, thereby reducing the overall equipment installation space.

[0079] So far, the embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions of the present application according to the above description, and the scope of the present application is defined by the appended claims.

Claims

1. A composite flow channel plate tower for deep dehydration of natural gas, characterized in that, The tower body (1) is connected to a moisture inlet (11) at the bottom, a dry gas outlet (12) and a dehydration liquid inlet (14) at the top, and a waste liquid outlet (13) at the bottom. The tower body (1) is provided with a fine dehydration structure (5), a plate dehydration structure (4), a condensation structure (3) and a cyclone dehydration structure (2) from top to bottom. The fine dehydration structure (5) is located between the dry gas outlet (12) and the dehydration liquid inlet (14), and a heating structure (6) is provided at the fine dehydration structure (5). The cyclone dehydration structure (2) is set as a cyclone cylinder, and the valve pipe at the moisture inlet (11) is connected to the upper part of the cyclone cylinder, and the direction of the valve pipe is tangent to the inner wall of the circular barrel structure. The condensation structure (3) includes a condenser tube (302), the diameter of which is smaller than the diameter of the vortex tube; The plate-type dewatering structure (4) includes an orifice plate (402) inclinedly arranged in the tower body (1), and the orifice plate (402) is provided with several through channels; The fine dehydration structure (5) includes a hydrophobic plate (501), a hydrophilic plate (502), a hydrophilic plate (502), and a hydrophobic plate (501) arranged sequentially from top to bottom. The hydrophobic plate (501) and its adjacent hydrophilic plate (502) are attached to each other. A tower space is provided between the adjacent hydrophilic plates (502). A water vapor outlet (504) and a humidity sensor (505) are provided in the tower space.

2. A composite flow channel plate tower for deep dehydration of natural gas according to claim 1, characterized in that, The upper part of the cyclone tube is a circular barrel-shaped structure, and the lower part of the cyclone tube is a conical barrel-shaped structure, with the conical tip located at the bottom.

3. A composite flow channel plate tower for deep dehydration of natural gas according to claim 2, characterized in that, Several atomizing structures (7) are fixedly installed on the conical barrel-shaped structure wall at the lower part of the cyclone tube. The atomizing structure (7) is configured as a long strip plate, and several long grooves are passed through the surface of the long strip plate.

4. A composite flow channel plate tower for deep dehydration of natural gas according to claim 1, characterized in that, The lower end of the condenser tube (302) is connected to the top of the cyclone separator, and the upper end of the condenser tube (302) is connected to the internal space of the upper part of the tower body (1). The condenser tube (302) has several condenser sub-tubes (303) fixedly connected inside it, and the diameter of the condenser sub-tubes (303) is smaller than the diameter of the condenser tube (302).

5. A composite flow channel plate tower for deep dehydration of natural gas according to claim 1, characterized in that, Filter plates (304) are fixedly installed in the tower body (1) at both ends of the condenser tube (302), and the surface area of ​​the filter plate (304) corresponds to the internal cross-sectional area of ​​the tower body (1). The filter plate (304) has several through holes.

6. A composite flow channel plate tower for deep dehydration of natural gas according to claim 4, characterized in that, The walls of the condenser tube (302) and the condenser auxiliary tube (303) are configured with hydrophobic walls; The top of the cyclone tube is configured as a conical top cavity (301), and the conical tip of the conical top cavity (301) is close to the lower end of the condenser tube (302).

7. A composite flow channel plate tower for deep dehydration of natural gas according to claim 1, characterized in that, The plate-type dewatering structure (4) also includes a guide plate (401). The guide plate (401) is fixedly inclined on the inner wall of the tower body (1). The inclined bottom end of the guide plate (401) is fixedly connected to one end of the perforated plate (402). The other end of the perforated plate (402) contacts the plate surface of the slow flow plate (403). The slow flow plate (403) is fixed on the inner wall of the tower body (1). The inclination of the orifice plate (402) relative to the tower body (1) is greater than the inclination of the guide plate (401) relative to the tower body (1); The surface of the flow-retardant plate (403) is set as a horizontal plate surface or an inclined plate surface with a relative inclination less than that of the flow guide plate (401).

8. A composite flow channel plate tower for deep dehydration of natural gas according to claim 7, characterized in that, The tower body (1) has at least two layers of plate-type dewatering structures (4) continuously arranged from top to bottom. The guide plate (401) of the top plate dewatering structure (4) is located below the dewatering liquid inlet (14); The end of the flow-retarding plate (403) of each layer of the plate dewatering structure (4) is fixedly connected to the inclined top of the flow guide plate (401) of the next layer of plate dewatering structure (4).

9. A composite flow channel plate tower for deep dehydration of natural gas according to claim 1, characterized in that, Each of the hydrophobic plates (501) and hydrophilic plates (502) has a number of micropores (503) through its surface. A humidity sensor (505) is installed inside the tower body space. The humidity sensor (505) is electrically connected to the pump pressure valve control terminal of the water vapor outlet (504) and the pump pressure valve control terminal of the moisture inlet (11). The tower body also has a water vapor outlet (504) connected to it.

10. A composite flow channel plate tower for deep dehydration of natural gas according to claim 1, characterized in that, The heating structure (6) includes an air cavity (601); Each of the hydrophobic plates (501) is configured with a hollow air cavity (601). One side of the air cavity (601) is connected to one end of the air outlet pipe (602), and the other side of the air cavity (601) is connected to one end of the air inlet pipe (604). The other ends of the air inlet pipe (604) and the air outlet pipe (602) are respectively connected to the air pump inlet and air pump outlet of the heating component (603). The air cavity (601) is filled with inert gas. The air intake pipe (604) passes through the bottom of the vortex tube.

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