High-pressure impurity removing and sand filtering integrated device and using method

Abstract

The invention relates to the technical field of natural gas pretreatment, and particularly discloses a high-pressure impurity-removing and sand-filtering integrated device and a using method thereof.The high-pressure impurity-removing and sand-filtering integrated device comprises a buffer chamber used for receiving natural gas guided out of a wellhead; a cyclone desander connected with the buffer chamber is arranged in the cyclone separation chamber; the filter shell is communicated with the cyclone separation chamber and is used for receiving the natural gas separated by the cyclone desander; the adsorption separation assembly comprises a plurality of adsorption plates which are arranged at intervals in a staggered manner in the airflow direction; the outer wall of the adsorption plate is a rough surface, and the adsorption plate is provided with a temperature control cavity; the temperature control assembly is used for introducing a cooling medium or a heating medium into the temperature control cavity to cool or heat the adsorption plate; and the buffer chamber and the cyclone separation chamber are integrated on the filter shell. High-viscosity flocculent floating objects in natural gas can be effectively separated, the separation effect of the natural gas is improved, and the problem that the sand remover is eroded due to the fact that the pressure of the natural gas at a wellhead outlet is large can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas pretreatment, and specifically relates to a high-pressure impurity removal and sand filtration integrated device and a using method thereof. Background Art

[0002] With the continuous update of natural gas extraction technology and the continuous breakthrough of the drilling depth from deep wells to ultra-deep wells, a large amount of mud, high-viscosity flocculent floating substances and formation water are carried in the produced natural gas, and the working condition pressure is relatively high (up to 69 MPa), and the gas flow rate is relatively fast; generally, a desander is used to treat natural gas. Existing desanders generally change the gas flow direction forcibly and use the centrifugal principle to separate impurities from the gas. However, in the working conditions of mud and high-viscosity flocculent floating substances, the relatively large high-viscosity flocculent floating substances have a large gravity and can be separated in the desander. However, for some smaller high-viscosity flocculent floating substances, due to their small own gravity and large viscosity, they flow out with the natural gas, resulting in poor separation effect of natural gas; the prior art uses a filter component to filter natural gas to separate high-viscosity flocculent floating substances from natural gas. However, due to its large viscosity, it is easy to cause the filter component to be blocked.

[0003] At the same time, the natural gas at the wellhead outlet has a relatively high working condition pressure. If it directly enters the desander, there is generally a serious problem of erosion of the desander structural parts. Seriously, it may cause equipment erosion damage and process shutdown, resulting in serious safety hazards in the on-site process operation. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-pressure impurity removal and sand filtration integrated device and a using method thereof, to effectively separate high-viscosity flocculent floating substances in natural gas, improve the separation effect of natural gas, and be able to alleviate the problem of erosion of the desander caused by the high pressure of the natural gas at the wellhead outlet.

[0005] The present invention is achieved by the following technical solutions:

[0006] A high-pressure impurity removal and sand filtration integrated device includes:

[0007] A buffer chamber for receiving natural gas exported from the wellhead;

[0008] A cyclone separation chamber, inside which a cyclone desander connected to the buffer chamber is arranged;

[0009] A filter housing communicated with the cyclone separation chamber for receiving natural gas separated by the cyclone desander;

[0010] An adsorption separation component, including a plurality of adsorption plates arranged in a staggered and spaced manner along the gas flow direction; the outer wall of the adsorption plate is a rough surface, and the adsorption plate has a temperature control chamber;

[0011] A temperature control component, used to introduce a cooling medium or a heating medium into the temperature control chamber to cool or heat the adsorption plate;

[0012] The buffer chamber and the cyclone separation chamber are both integrated on the filter housing.

[0013] The present invention sets a buffer chamber at the front end of the cyclone separation chamber to reduce the pressure and slow down the natural gas extracted from the wellhead, so as to prevent the natural gas from directly entering the cyclone desander for cyclone separation, which will cause great erosion to the cyclone desander, and at the same time, some heavier impurities such as mud and sand will settle. The cyclone desander of the present invention is an existing equipment, which can realize cyclone separation of natural gas, and can separate most of the heavier high-viscosity flocculent floating objects and formation water as well as impurities such as mud and sand. The high-viscosity flocculent floating objects and formation water that cannot be separated by cyclone enter the filter shell with the natural gas and are further separated by the adsorption separation component. During the movement of natural gas, the formation water entrained in the natural gas hits the adsorption plate, causing it to break and slow down and fall to the bottom of the filter shell. In addition, since the high-viscosity flocculent floating objects have the characteristic of changing viscosity with temperature, the lower the temperature, the greater the viscosity, and the higher the temperature, the lower the viscosity. The adsorption separation component of the present invention The temperature of the attached plate can be adjusted by the temperature control component. When adsorption separation is performed, the adsorption plate is cooled. When the high-viscosity flocculent floating matter entrained by the natural gas hits the adsorption plate with a lower temperature, on the one hand, the speed is reduced due to the impact. On the other hand, due to the increase in low-temperature viscosity and the rough surface of the adsorption plate, the high-viscosity flocculent floating matter entrained in the natural gas adheres to the adsorption plate and is separated from the natural gas. At the same time, the mud and sand will further settle in the filter shell. After the impact of multiple adsorption plates, the mud and sand, high-viscosity flocculent floating matter and formation water entrained in the natural gas can be almost completely separated.

[0014] In summary, the present invention adopts a buffer chamber, a cyclone centrifugal separation chamber and a filter shell capable of achieving adsorption separation, and can perform buffer deceleration, cyclone separation, and adsorption separation in sequence, thereby achieving three-stage separation; it can achieve effective separation of mud and sand in natural gas, formation water, and high-viscosity flocculent floating matter in natural gas, especially solving the problem of difficulty in separating high-viscosity flocculent floating matter in existing natural gas, improving the separation effect of natural gas, and being able to alleviate the problem of erosion of the desander caused by high pressure of natural gas at the wellhead outlet.

[0015] Furthermore, the present invention adopts an integrated design, which can reduce the floor space.

[0016] In a preferred embodiment, the temperature control chamber is provided with a first joint, which includes a main pipeline connected to the temperature control chamber, and a cooling pipe and a heating pipe are connected to the main pipeline; the cooling pipe and the temperature control component form a cold medium circulation loop; the heating pipe and the temperature control component form a hot medium circulation loop.

[0017] In a preferred embodiment, a cooling valve and a heating valve are respectively arranged on the cooling pipe and the heating pipe; the temperature control assembly further includes a control unit for controlling the start / stop and opening / closing degree of the cooling valve and the heating valve.

[0018] In a preferred embodiment, a plurality of adsorption plates in the adsorption separation assembly are connected in series through connecting pipes, so that a plurality of temperature control cavities are communicated, and the first joints are arranged in cooperation with the first and last adsorption plates.

[0019] In a preferred embodiment, each adsorption plate is provided with a first joint in cooperation.

[0020] In a preferred embodiment, a cleaning cavity is arranged outside the temperature control cavity of the adsorption plate. The cleaning cavity is an annular cavity, and a plurality of first through holes are arranged on the bottom and outer wall of the annular cavity; a water inlet communicated with the cleaning cavity is arranged on the adsorption plate, and cleaning water is introduced into the cleaning cavity through the water inlet.

[0021] The adsorption plate of the present invention utilizes low temperature combined with a rough surface to realize the adsorption and separation of high-viscosity flocculent floating substances entrained in natural gas. During use, some of the adsorbed high-viscosity flocculent floating substances may fall to the bottom of the filter housing with the formation water and be discharged, but there will still be high-viscosity flocculent floating substances adhering to the adsorption plate. In order to improve the use effect of the adsorption plate, the adsorption plate needs to be cleaned regularly. On the one hand, the adsorption plate can be heated to reduce the viscosity of the high-viscosity flocculent floating substances, which is beneficial to their detachment from the adsorption plate. On the other hand, the present invention realizes the cleaning of the adsorption plate by arranging a cleaning cavity and introducing cleaning water into the cleaning cavity, and using the water flow as a medium to detach the high-viscosity flocculent floating substances with reduced viscosity from the adsorption plate.

[0022] In a preferred embodiment, the top of the annular cavity is an open end; a water inlet valve is arranged on the water inlet, and the start / stop and opening / closing degree of the water inlet valve are controlled by the control unit.

[0023] In a preferred embodiment, the first through holes arranged on the outer wall of the annular cavity are inclined, and the outer ports of the first through holes are arranged downward.

[0024] In a preferred embodiment, the inlet pipe and the outlet pipe of the buffer chamber are arranged oppositely; a flow buffering component is arranged between the inlet pipe and the outlet pipe in the buffer chamber.

[0025] In a preferred embodiment, the flow buffering component includes a plurality of flow buffering columns or hollow cylinders or strip baffles; the strip baffles include corrugated plates or a plurality of protrusions are arranged on a flat plate.

[0026] In a preferred embodiment, the plurality of flow-slowing columns have overlapping portions in the radial direction such that the intake pipe and the outlet pipe cannot communicate directly; the lateral width of the plurality of flow-slowing columns is greater than the diameter of the intake pipe; the outer diameter of the hollow cylinder is greater than the diameter of the intake pipe; the width of the strip-shaped baffle is greater than the diameter of the intake pipe.

[0027] In a preferred embodiment, the top of the buffer chamber has an opening, and an annular plate is disposed in cooperation with the opening; the flow-slowing assembly further includes a base, and the flow-slowing columns, the hollow cylinder, and the strip-shaped baffle are mounted on the base, and the base is detachably connected to the annular plate; an annular guiding plate is disposed on the base outside the flow-slowing columns, the hollow cylinder or the strip-shaped baffle.

[0028] In a preferred embodiment, the flow-slowing column includes a housing, and a filter frame is detachably disposed inside the housing, and adsorption filler is filled in the filter frame, and a plurality of second through holes are disposed on the housing; a plurality of convex ribs are disposed on the outer circumference of the filter frame along the circumferential direction.

[0029] The present invention optimizes the design of the buffer assembly in the buffer chamber, which can not only achieve buffer decompression, but also achieve preliminary separation.

[0030] In a preferred embodiment, a collection chamber is further disposed on the filter housing, and the collection chamber is disposed below the cyclone separation chamber for collecting the particles and moisture separated by the cyclone desander; the upper part of the collection chamber and the lower part of the cyclone separation chamber are both disposed inside the filter housing; a drain port and a sewage discharge port are disposed on the collection chamber, the height of the drain port is higher than that of the sewage discharge port, and a baffle is disposed in cooperation with the drain port, and the baffle is used to prevent particles from being discharged from the drain port.

[0031] A method for using a high-pressure impurity-removing and sand-filtering integrated device includes the following steps:

[0032] When the high-pressure impurity-removing and sand-filtering integrated device is used for wellhead natural gas pretreatment, a cooling medium is first introduced into the temperature control chamber to pre-cool the adsorption plate and keep the adsorption plate cooled by the cooling medium during the use process; then the natural gas is introduced into the high-pressure impurity-removing and sand-filtering integrated device, and sequentially enters the buffer chamber, the cyclone separation chamber and the filter housing, and sequentially performs buffer deceleration, cyclone separation, and adsorption separation, and finally is discharged from the air outlet on the filter housing;

[0033] When the high-pressure impurity-removing and sand-filtering integrated device is not in use, a heating medium is introduced into the temperature control chamber to pre-heat the adsorption plate, and then a cleaning medium is introduced onto the adsorption plate to clean the adsorption plate.

[0034] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0035] 1. The high-pressure impurity removal and sand filtration integrated device of the present invention mainly includes a buffer chamber, a cyclone centrifugal separation chamber, and a filter housing capable of achieving adsorption separation. It can sequentially perform buffer deceleration, cyclone separation, and adsorption separation, realizing three-stage separation. Among them, the buffer chamber is used to achieve buffering to adapt to the working conditions of high-pressure natural gas at the wellhead, so as to alleviate the problem that the natural gas at the wellhead outlet erodes the desander due to high pressure; the cyclone centrifugal separation chamber can separate most of the heavier high-viscosity flocculent floating substances, formation water, and sediment. Adsorption separation can use the impact of natural gas during movement on the adsorption plate and the low temperature of the adsorption plate to achieve secondary separation of formation water in natural gas, and effectively separate high-viscosity flocculent floating substances in natural gas, improving the separation effect of natural gas.

[0036] 2. The adsorption plate of the present invention uses low temperature combined with a rough surface to achieve adsorption separation of high-viscosity flocculent floating substances entrained in natural gas; the present invention can also use high temperature and water flow flushing to remove the high-viscosity flocculent floating substances on the adsorption plate, realize automatic cleaning of the adsorption plate, and restore its adsorption separation function.

[0037] 3. The present invention is provided with a flow buffering component between the inlet pipe and the outlet pipe in the buffer chamber. The flow buffering component has a blocking effect on natural gas, can improve the flow buffering effect of the buffer chamber on the wellhead natural gas, realize the settlement of more impurities in the buffer chamber, and is beneficial to reducing the separation pressure of the cyclone desander; and, in an optimized manner, the flow buffering column includes a housing, and a filter frame is detachably arranged in the housing. The filter frame is filled with adsorption filler, and the adsorption effect of the adsorption filler can be used to adsorb a part of the high-viscosity flocculent floating substances, avoiding the corrosion of the cyclone desander by the high-viscosity flocculent floating substances. Using the adsorption of the adsorption filler and the subsequent low-temperature adsorption plate adsorption can further improve the separation effect of high-viscosity flocculent floating substances in natural gas, and the flow buffering component is detachably arranged in the buffer chamber, which is convenient for replacing the adsorption filler and maintaining its adsorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0039] Figure 1 is a schematic structural diagram of the high-pressure impurity removal and sand filtration integrated device of the present invention;

[0040] Figure 2 is a schematic structural diagram of the adsorption plate of the present invention;

[0041] Figure 3 is a top view of the buffer chamber in Embodiment 1 of the present invention;

[0042] Figure 4 is a schematic structural diagram of the flow buffering component in Embodiment 1 of the present invention;

[0043] Figure 5 It is a schematic structural diagram of the flow-slowing column in Embodiment 5 of the present invention;

[0044] Figure 6 It is a top view of the buffer chamber in Embodiment 2 of the present invention;

[0045] Figure 7 It is a top view of the buffer chamber in Embodiment 3 of the present invention.

[0046] Marks in the attached drawings and corresponding component names:

[0047] 1 - filter housing; 2 - buffer chamber; 3 - cyclone separation chamber; 4 - adsorption plate; 5 - filter assembly; 6 - cyclone desander; 7 - collection chamber; 8 - flow-slowing assembly; 9 - first joint; 10 - connecting pipe; 11 - air outlet; 12 - liquid discharge port; 21 - intake pipe; 22 - outlet pipe; 23 - annular plate; 41 - second joint; 42 - temperature control chamber; 43 - cleaning chamber; 44 - water inlet; 61 - intake joint; 62 - communication pipe; 71 - drain port; 72 - baffle; 81 - base; 82 - annular guide plate; 83 - flow-slowing column; 84 - hollow cylinder; 85 - strip baffle; 91 - main pipeline; 92 - cooling pipe; 93 - heating pipe; 94 - cooling valve; 95 - heating valve; 831 - outer shell; 832 - filter frame; 833 - rib; 834 - adsorption filler. Detailed implementation manners

[0048] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with embodiments and the attached drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and do not limit the present invention. The following described embodiments are some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0049] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that: the present invention does not have to adopt these specific details. In other embodiments, in order to avoid confusing the present invention, well-known structures, materials or methods are not specifically described. Materials, instruments and reagents used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels. The technical means used in the embodiments, unless otherwise specified, are all conventional means well-known to those skilled in the art.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0051] Embodiment 1:

[0052] For the pressure removal of wellhead natural gas, in addition to considering the separation efficiency, i.e., being able to effectively separate the sediment, high-viscosity flocculent floating substances, and formation water in the natural gas, factors such as the damage of the wellhead pressure to the equipment and the floor area of the equipment also need to be considered. Since the natural gas contains high-viscosity flocculent floating substances, the prior art has a poor separation effect on the high-viscosity flocculent floating substances. Based on this, this embodiment provides a high-pressure impurity removal and sand filtration integrated device, as Figures 1 - 4 shown, including:

[0053] A buffer chamber 2 for receiving the natural gas exported from the wellhead; an air inlet pipe 21 and an air outlet pipe 22 are respectively arranged on the buffer chamber 2. Among them, the air inlet pipe 21 is used to connect with the natural gas inlet to introduce the mined natural gas into the buffer chamber 2. The buffer chamber 2 utilizes its large accommodation space to reduce the pressure and slow down the speed of the natural gas. The slowed-down natural gas is exported from the air outlet pipe 22.

[0054] In a preferred case, in order to improve the speed reduction effect on the natural gas, the air inlet pipe 21 and the air outlet pipe 22 of the buffer chamber 2 are arranged oppositely; a flow retardation component 8 is arranged between the air inlet pipe 21 and the air outlet pipe 22 in the buffer chamber 2, and the flow retardation component 8 is used to further slow down the natural gas in the buffer chamber 2 by means of its blocking effect; as Figures 3 - 4 shown, in this embodiment, the flow retardation component 8 includes a plurality of flow retardation columns 83. Preferably, the plurality of flow retardation columns 83 have overlapping parts in the radial direction so that the air inlet pipe 21 and the air outlet pipe 22 cannot be directly communicated, that is, there is no straight gap between the air inlet pipe 21 and the air outlet pipe 22; the transverse width of the plurality of flow retardation columns 83 is greater than the diameter of the air inlet pipe 21, and the natural gas needs to bypass the flow retardation columns 83 before being exported from the buffer chamber 2 to improve the blocking effect on the natural gas; in this embodiment, the air inlet pipe 21 and the air outlet pipe 22 have the same size, as Figure 3 shown, the transverse width of the plurality of flow retardation columns 83 refers to Figure 3 the diameter of the circle formed by the 7 flow retardation columns 83 shown in

[0055] In a preferred case, in order to replace or overhaul the slow flow component 8, the top of the buffer chamber 2 has an opening, and an annular plate 23 is arranged in cooperation at the opening; the slow flow component 8 further includes a base 81, the slow flow column 83 is installed on the base 81, and the base 81 and the annular plate 23 can be connected by bolts. Preferably, an annular guide plate 82 is arranged on the base 81 on the side of the slow flow column 83. After the slow flow component 8 is installed, the annular guide plate 82 is arranged inside the annular plate 23, and when installed, the annular guide plate 82 has a guiding function.

[0056] A cyclone separation chamber 3, in which a cyclone desander 6 connected to the buffer chamber 2 is arranged; the cyclone desander 6 has an air inlet joint 61, and after passing through the side wall of the air inlet joint 61, the air inlet joint 61 is connected to the outlet pipe 22. The cyclone desander 6 has a top outlet and a bottom slag discharge port. The separated natural gas is discharged from the top outlet and enters the cyclone separation chamber 3, and the separated mud, high-viscosity flocculent floating matter and formation water are discharged from the bottom slag discharge port.

[0057] A filter housing 1, which is communicated with the cyclone separation chamber 3 and is used for receiving the natural gas separated by the cyclone desander 6; the buffer chamber 2 and the cyclone separation chamber 3 are both integrally arranged on the filter housing 1.

[0058] In a specific case, the buffer chamber 2 and the cyclone separation chamber 3 are sequentially arranged along the axial direction of the filter housing 1. The buffer chamber 2 is installed on the top of the buffer chamber 2, the cyclone separation chamber 3 vertically penetrates through the top of the filter housing 1, the top of the cyclone separation chamber 3 is located outside the filter housing 1 and is communicated with the inside of the filter housing 1 through a connecting pipe, the lower part of the cyclone separation chamber 3 is placed inside the filter housing 1, and the bottom of the cyclone desander 6 penetrates through the bottom of the cyclone separation chamber 3.

[0059] In a preferred case, in order to quickly export the mud, high-viscosity flocculent floating matter and formation water separated by the cyclone desander 6, a collection chamber 7 is arranged below the cyclone desander 6. The collection chamber 7 vertically penetrates through the bottom of the filter housing 1. The upper part of the collection chamber 7 is placed inside the filter housing 1, and the top of the collection chamber 7 is an open end for collecting the sediment and other particles and formation water separated by the cyclone desander 6; the lower part of the collection chamber 7 is placed outside the filter housing 1, and a drain port 71 and a sewage discharge port are arranged on the lower part of the collection chamber 7. The height of the drain port 71 is higher than that of the sewage discharge port. Preferably, a baffle 72 is arranged in cooperation with the drain port 71, and the baffle 72 is used to prevent particles from being discharged from the drain port 71. As Figure 1 shown, the baffle 72 is an L-shaped plate, and the end of the horizontal section of the L-shaped plate is connected to the inner wall of the collection chamber 7 and is placed above the drain port 71.

[0060] The adsorption separation component is arranged in the filter housing 1. The adsorption separation component includes a plurality of adsorption plates 4 arranged in a staggered and spaced manner along the air flow direction. The outer wall of the adsorption plate 4 is a rough surface, and the adsorption plate 4 has a temperature control chamber 42. The staggered and spaced arrangement in this embodiment means that there is a spacing between two adjacent adsorption plates 4, and the heights of the plurality of adsorption plates 4 are inconsistent, which is conducive to the full contact between natural gas and the adsorption plate 4. For example, Figure 1 As shown, the adsorption separation component includes 3 adsorption plates 4. The adsorption plate 4 uses low temperature combined with a rough surface to achieve the adsorption and separation of high-viscosity flocculent floating substances entrained in natural gas.

[0061] The temperature control component is used to introduce a cooling medium or a heating medium into the temperature control chamber 42 to cool or heat the adsorption plate 4. The temperature control component includes a cooling end and a heating end. Among them, the cooling end is used to provide a cooling medium, and the heating end is used to provide a heating medium. The cooling medium can be a low-temperature gas, which can cool the adsorption plate 4 to -5 - 10 °C, and the heating medium can be steam, etc.

[0062] In a specific case, the temperature control chamber 42 is provided with a first connector 9. The first connector 9 includes a main pipe 91 communicated with the temperature control chamber 42. A cooling pipe 92 and a heating pipe 93 are connected to the main pipe 91. A cold medium circulation loop is formed between the cooling pipe 92 and the cooling end of the temperature control component; a hot medium circulation loop is formed between the heating pipe 93 and the heating end of the temperature control component. Cooling valves 94 and heating valves 95 are respectively arranged on the cooling pipe 92 and the heating pipe 93. The temperature control component further includes a control unit, and the control unit contains a controller. The control unit is used to control the start, stop and opening degree of the cooling valve 94 and the heating valve 95. When it is necessary to cool the adsorption plate 4, the controller controls the cooling valve 94 to open and the heating valve 95 to close, that is, the cold medium circulation loop is conducted and the hot medium circulation loop is closed; when it is necessary to heat the adsorption plate 4, the controller controls the cooling valve 94 to close and the heating valve 95 to open, that is, the cold medium circulation loop is closed and the hot medium circulation loop is conducted.

[0063] The adsorption and separation principle of the adsorption separation component in this embodiment is as follows:

[0064] During the movement of natural gas, the formation water entrained in the natural gas hits the adsorption plate 4, causing it to break and slow down and fall into the bottom of the filter housing 1; and, since the high-viscosity flocculent floating matter has the characteristic of changing viscosity with temperature, the lower the temperature, the greater the viscosity, and the higher the temperature, the lower the viscosity. The temperature of the adsorption plate 4 of this embodiment can be adjusted by the temperature control component. When adsorption separation is performed, the adsorption plate 4 is cooled. When the high-viscosity flocculent floating matter entrained in the natural gas hits the adsorption plate 4 with a lower temperature, on the one hand, the speed is reduced due to the impact, and on the other hand, due to the increase in viscosity at low temperature, the high-viscosity flocculent floating matter mixed with the natural gas is attached to the adsorption plate 4 with the rough surface of the adsorption plate 4, and is separated from the natural gas. At the same time, the mud and sand will further settle in the filter housing 1; after being hit by multiple adsorption plates 4, the mud and sand, high-viscosity flocculent floating matter and formation water entrained in the natural gas can be almost completely separated.

[0065] In this embodiment, a plurality of adsorption plates 4 in the adsorption separation assembly are arranged in series through a connecting pipe 10 so that a plurality of temperature control chambers 42 are connected, and the first and last adsorption plates 4 are both provided with a first joint 9 .

[0066] In this embodiment, an air outlet 11 is provided at the rear end of the adsorption separation assembly at the top of the filter housing 1, and a liquid discharge port 12 is provided at the bottom of the filter housing 1. Preferably, a filter assembly 5 is further provided below the air outlet 11 in the filter housing 1, and the filter assembly 5 can use a foam net filter or an adsorption filler filter.

[0067] The method for using the high-pressure impurity removal and sand filtering integrated device of this embodiment includes the following steps:

[0068] When the high-pressure impurity removal and sand filter integrated device is used for wellhead natural gas pretreatment, a cooling medium is first introduced into the temperature control chamber 42 to precool the adsorption plate 4, which can be precooled to -5-10°C and the adsorption plate 4 is always cooled by the cooling medium during use; then the natural gas is introduced into the high-pressure impurity removal and sand filter integrated device, and enters the buffer chamber 2, the cyclone separation chamber 3 and the filter housing 1 in sequence, and performs buffer deceleration, cyclone separation, adsorption separation in sequence, and finally discharged from the gas outlet 11 on the filter housing 1;

[0069] When the high-pressure impurity removal and sand filtering integrated device is not in use, a heating medium is introduced into the temperature control chamber 42 to preheat the adsorption plate 4 , and then a cleaning medium is introduced onto the adsorption plate 4 to clean the adsorption plate 4 .

[0070] Embodiment 2:

[0071] like Figure 6As shown in the figure, this embodiment is based on Embodiment 1. The difference from Embodiment 1 is that the structure of the flow retardation component 8 is different. In this embodiment, the flow component 8 is a hollow cylinder 84. The outer diameter of the hollow cylinder 84 is greater than the diameter of the intake pipe 21 and less than the inner diameter of the buffer chamber 2. After the natural gas enters the buffer chamber 2, it can be led out through the gap between the hollow cylinder 84 and the buffer chamber 2. The hollow cylinder 84 also plays a role in blocking the natural gas.

[0072] In a preferred case, a number of through holes are provided on the side wall of the hollow cylinder 84.

[0073] Embodiment 3:

[0074] As Figure 7 shown in the figure, this embodiment is based on Embodiment 1. The difference from Embodiment 1 is that the structure of the flow retardation component 8 is different. In this embodiment, the flow component 8 is a strip-shaped baffle 85; the width of the strip-shaped baffle 85 is greater than the diameter of the intake pipe 21, and the flow retardation is achieved by the blocking effect of the strip-shaped baffle 85.

[0075] In a preferred case, the strip-shaped baffle 85 is a corrugated plate, or the strip-shaped baffle 85 is a flat plate, and a number of protrusions are provided on the flat plate; the above settings can increase the surface area of the strip-shaped baffle 85 and improve the blocking effect on the natural gas.

[0076] In a preferred case, a number of through holes are provided on the strip-shaped baffle 85.

[0077] Embodiment 4:

[0078] This embodiment is based on Embodiment 1. The difference from Embodiment 1 is that each adsorption plate 4 is provided with two first connectors 9. The two first connectors 9 are respectively used as the intake end and the outlet end. Specifically, one of the first connectors 9 is connected to the top of the adsorption plate 4, and the other is connected to the side wall of the adsorption plate 4. It can be Figure 1 the back of the position shown.

[0079] Embodiment 5:

[0080] As Figures 1 - 5As shown in the figure, this embodiment is based on Embodiment 1. In this embodiment, an optimization design is carried out through the buffer assembly 8, which can not only achieve buffer pressure reduction, but also achieve the preliminary separation of natural gas. Specifically, the flow buffer column 83 includes a housing 831, in which a filter frame 832 is detachably arranged. An adsorption filler 834 is filled in the filter frame 832. The adsorption filler 834 is an existing substance that can adsorb high-viscosity flocculent floating substances, which can specifically be activated carbon, activated alumina, polyurethane foam, etc. A number of second through holes are provided on the housing 831, and natural gas enters the adsorption filler 834 through the second through holes, and the entrained high-viscosity flocculent floating substances can be adsorbed by the adsorption filler 834; a plurality of convex ribs 833 are arranged on the outer side of the filter frame 832 along the circumferential direction. The plurality of convex ribs 833 realize a gap between the adsorption filler 834 and the housing 831, which can ensure that natural gas can pass through the flow buffer column 83 relatively quickly.

[0081] That is, in this embodiment, part of the natural gas entering the buffer chamber 2 is led out through the gaps between the plurality of flow buffer columns 83, and part is led out after being adsorbed and filtered by the adsorption filler 834.

[0082] In a specific case, one end of the housing 831 is fixed on the base 81, and the other end is an open end. The filter frame 832 can be inserted through the open end, and the open end can be cooperatively provided with an end cover connected by threads to fix the filter frame 832.

[0083] This embodiment can utilize the adsorption effect of the adsorption filler to adsorb a part of the high-viscosity flocculent floating substances, avoiding the corrosion of the high-viscosity flocculent floating substances to the cyclone desander 6. By using the adsorption of the adsorption filler and the subsequent adsorption of the low-temperature adsorption plate 4, the separation effect of the high-viscosity flocculent floating substances in natural gas can be further improved. Moreover, the buffer assembly 8 is detachably arranged in the buffer chamber 2, which is convenient for replacing the adsorption filler and maintaining its adsorption effect.

[0084] Embodiment 6:

[0085] As Figure 2 shown in the figure, this embodiment is based on Embodiment 1. In this embodiment, a cleaning chamber 43 is arranged on the outer side of the temperature control chamber 42 of the adsorption plate 4. The cleaning chamber 43 is an annular cavity, and a number of first through holes are arranged on the bottom and outer wall of the annular cavity; a water inlet 44 communicating with the cleaning chamber 43 is arranged on the adsorption plate 4, and cleaning water is introduced into the cleaning chamber 43 through the water inlet 44; a water inlet valve is arranged on the water inlet 44, and the water inlet valve is controlled by the control unit to start, stop and open and close.

[0086] In this embodiment, in order to improve the use effect of the adsorption plate 4, the adsorption plate 4 needs to be cleaned regularly. On the one hand, the adsorption plate 4 can be heated to reduce the viscosity of the high-viscosity flocculent floating matter, which is beneficial to its detachment from the adsorption plate. On the other hand, in this embodiment, a cleaning cavity 43 is provided, and cleaning water is introduced into the cleaning cavity 43. Using water flow as a medium, the high-viscosity flocculent floating matter with reduced viscosity is detached from the adsorption plate 4, realizing the cleaning of the adsorption plate 4 and improving the cleaning effect of the adsorption plate 4.

[0087] In a preferred case, the top of the annular cavity is an open end. The cleaning water in the annular cavity can overflow through the opening at the top to wash the outer wall of the annular cavity, so as to improve the cleaning effect of the adsorption plate 4.

[0088] In a preferred case, the first through hole provided on the outer wall of the annular cavity is inclined, and the outer port of the first through hole is arranged downward, which is beneficial to improving the cleaning effect of the adsorption plate 4.

[0089] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0090] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope that the technical content disclosed by the present invention can cover. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope under which the present invention can be implemented.

Claims

1. An integrated device for high-pressure impurity removal and sand filtration, characterized in that Comprising: A buffer chamber (2) for receiving natural gas exported from the wellhead; A cyclone separation chamber (3) provided therein with a cyclone desander (6) connected to the buffer chamber (2); A filter housing (1) communicating with the cyclone separation chamber (3) for receiving the natural gas separated by the cyclone desander (6); An adsorption separation assembly including a plurality of adsorption plates (4) arranged in a staggered and spaced manner along the gas flow direction; the outer wall of the adsorption plate (4) is a rough surface, and the adsorption plate (4) has a temperature control chamber (42); A temperature control assembly for introducing a cooling medium or a heating medium into the temperature control chamber (42) to cool or heat the adsorption plate (4); Both the buffer chamber (2) and the cyclone separation chamber (3) are integrally provided on the filter housing (1).

2. The integrated device for high-pressure impurity removal and sand filtration according to claim 1, wherein The temperature control chamber (42) is provided with a first connector (9), the first connector (9) includes a main pipe (91) communicating with the temperature control chamber (42), and a cooling pipe (92) and a heating pipe (93) are connected to the main pipe (91); the cooling pipe (92) forms a cold medium circulation loop with the temperature control assembly; the heating pipe (93) forms a hot medium circulation loop with the temperature control assembly.

3. The integrated device for high-pressure impurity removal and sand filtration according to claim 2, characterized in that, Cooling valves (94) and heating valves (95) are respectively provided on the cooling pipe (92) and the heating pipe (93); the temperature control assembly further includes a control unit for controlling the start / stop and opening / closing degrees of the cooling valve (94) and the heating valve (95).

4. The integrated device for high-pressure impurity removal and sand filtration according to claim 2, characterized in that, The plurality of adsorption plates (4) in the adsorption separation assembly are connected in series through a connecting pipe (10) to communicate the plurality of temperature control chambers (42), and the first connectors (9) are respectively provided for the first and last two adsorption plates (4).

5. The integrated device for high-pressure impurity removal and sand filtration according to claim 2, characterized in that, Each adsorption plate (4) is provided with a first connector (9).

6. The integrated device for high-pressure impurity removal and sand filtration according to claim 1, characterized in that, The adsorption plate (4) is provided with a cleaning chamber (43) outside the temperature control chamber (42), the cleaning chamber (43) is an annular cavity, and a plurality of first through holes are provided on the bottom and outer wall of the annular cavity; the adsorption plate (4) is provided with a water inlet (44) communicating with the cleaning chamber (43), and cleaning water is introduced into the cleaning chamber (43) through the water inlet (44).

7. An integrated device for high-pressure impurity removal and sand filtration according to claim 6, characterized in that, The top of the annular cavity is an open end; a water inlet valve is provided on the water inlet (44), and the start / stop and opening / closing degrees of the water inlet valve are controlled by the control unit.

8. The integrated device for high-pressure impurity removal and sand filtration according to claim 6, characterized in that The first through holes provided on the outer wall of the annular cavity are inclined, and the outer ports of the first through holes are arranged downward.

9. The integrated device for high-pressure impurity removal and sand filtration according to claim 1, characterized in that The inlet pipe (21) and the outlet pipe (22) of the buffer chamber (2) are arranged opposite to each other; a flow buffering assembly (8) is provided in the buffer chamber (2) between the inlet pipe (21) and the outlet pipe (22).

10. The integrated device for high-pressure impurity removal and sand filtration according to claim 9, characterized in that, The flow buffering assembly (8) includes a plurality of flow buffering columns (83) or hollow cylinders (84) or strip baffles (85); the strip baffles (85) include corrugated plates or a plurality of protrusions provided on a flat plate.

11. A high-pressure impurity removal and sand filtration integrated device according to claim 10, characterized in that, A plurality of flow - retardant columns (83) have overlapping portions in the radial direction such that the intake pipe (21) and the outlet pipe (22) cannot be directly communicated; the lateral width of the plurality of flow - retardant columns (83) is greater than the diameter of the intake pipe (21); the outer diameter of the hollow cylinder (84) is greater than the diameter of the intake pipe (21); the width of the strip - shaped baffle (85) is greater than the diameter of the intake pipe (21).

12. The integrated device for high-pressure impurity removal and sand filtration according to claim 10, characterized in that, The top of the buffer chamber (2) has an opening, and an annular plate (23) is cooperatively arranged at the opening; the flow - retardant assembly (8) further includes a base (81), the flow - retardant columns (83), the hollow cylinder (84), and the strip - shaped baffle (85) are installed on the base (81), and the base (81) is detachably connected to the annular plate (23); an annular guiding plate (82) is arranged on the base (81) outside the flow - retardant columns (83), the hollow cylinder (84), or the strip - shaped baffle (85).

13. A high-pressure impurity removal and sand filtering integrated device according to claim 10, characterized in that, The flow - retardant column (83) includes a housing (831), a filter frame (832) is detachably arranged inside the housing (831), an adsorption filler (834) is filled in the filter frame (832), and a number of second through - holes are arranged on the housing (831); a plurality of convex ribs (833) are arranged along the circumferential direction on the outer side of the filter frame (832).

14. A high-pressure impurity removal and sand filtration integrated device according to any one of claims 1-13, characterized in that, A collection chamber (7) is further arranged on the filter housing (1), the collection chamber (7) is arranged below the cyclone separation chamber (3) and is used for collecting the particles and moisture separated by the cyclone desander (6); the upper part of the collection chamber (7) and the lower part of the cyclone separation chamber (3) are both arranged inside the filter housing (1); a drain port (71) and a sewage discharge port are arranged on the collection chamber (7), the height of the drain port (71) is higher than that of the sewage discharge port, and a baffle (72) is cooperatively arranged at the drain port (71), and the baffle (72) is used to prevent particles from being discharged from the drain port (71).

15. The usage method of an integrated device for high-pressure impurity removal and sand filtration as described in any one of claims 1-14, characterized in that, It includes the following steps: When the high - pressure impurity - removing and sand - filtering integrated device is used for well - head natural gas pretreatment, first introduce a cooling medium into the temperature - control chamber (42) to pre - cool the adsorption plate (4) and keep the adsorption plate (4) always cooled by the cooling medium during use; then introduce natural gas into the high - pressure impurity - removing and sand - filtering integrated device, and it enters the buffer chamber (2), the cyclone separation chamber (3), and the filter housing (1) in sequence, and undergoes buffer deceleration, cyclone separation, and adsorption separation in sequence, and finally is discharged from the air outlet (11) on the filter housing (1). When the high - pressure impurity - removing and sand - filtering integrated device is not in use, introduce a heating medium into the temperature - control chamber (42) to pre - heat the adsorption plate (4), and then introduce a cleaning medium onto the adsorption plate (4) to clean the adsorption plate (4).

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